Showing posts with label biplanes. Show all posts
Showing posts with label biplanes. Show all posts

Sunday, May 5, 2019

The Gloster Gladiator, an inappropriate, but so useful, biplane fighter! (revised the August 30, 2021 *)





{Sources : William Green, Famous fighter of the second World War - Vol. 2 -1962 ; En Wikipedia, article éponyme; 
http://surfcity.kund.dalnet.se/gladiator_norway.htm}



How to design an outdated fighter before her maiden flight!




In October 1931, the F.7/30 British specification defined the need for a new fighter able to fly at 250 mph (402 km/h), with good climbing times and having a good visibility.

The armament will gather four 7.7 mm machine-guns.

In these requirements, this program
 looked very similar to the French one of 1930 which lead to the ordering of Dewoitine 500, Loire 46 and of Spad 510.

Amazingly, the prototypes from this British program were not technologically superiors to those designed in France 2 years earlier.

The Gloster Gladiator was the archetypal fighter designed as a modest progress compared to her forerunner, the Gloster Gauntlet, to restrict the manufacturing costs.

So, the technological momentum of the 30's, that gave birth to the best fighters of the WW II, was very scarcely touching this fighter.

At this historical moment, in all technologically advanced countries, most of the designers conceived low-wing  monoplane fighters.

The conception of the last British biplane fighter began during the Spring of 1934, simultaneously with that of the Messerschmitt 109 (!).



If William Green ranked the Gladiator among his "so-calledFamous Fighters of WW II, he explained this honor was gained mostly to the extraordinary narrative (= fake news)  created by the British propaganda to hide the high level of unpreparedness of UK for the war to be.


The last British biplane fighter



The Gloster Gladiator  was
 8.36 m long.

She weighted 1460 kg empty and 2086 kg for take off.

Her wingspan was 9.83 m and the wing area totaled 30 m².

The wing loading of c70 kg/m² ensured an excellent maneuverability. 
May be, such a huge wing area could have induced some laziness in roll.

The Bristol Mercury IX  engine, of rather large diamet
er (~131 cm) delivered 825 hp at 2 650 t/m and 13,000 ft (3,952 m) and 840 hp at 2,750 t/m and 14,000 ft (4,256 m).

The maiden flight occurred the Septembe
r 12, 1934. 


The perfecting was quick, so an official mass production order occurred at mid-1937.


Very good performances... for 1932 !


The top speeds vs altitude performances were as follows (official data of 1937, at Martlesham Heath):

       0 m         325 kph

1,000 m         339 kph

2,000 m        357 kph

3,000 m        373 kph

4 000 m        389 kph

   4,500 m          395 kph 


5,000 m        392 kph

6,000 m        385 kph

8,000 m        361 kph

9,000 m        321 kph


You may found 407 kph (W. Green) which may be explained by the fitting of an enclosed and streamlined cockpit canopy. 


The other value of 414 kph is not explicated. May be, this value was released as a counter-fire against possible criticisms arousing against the abnormal slowness of the Hurricane and Spitfire mass production

Obviously, the Sea Gladiator (which see), heavier because of her enhanced armament and all the supplementary equipment used on aircraft-carrier, was a bit slower.

The total range of the Gladiator was 715 km, allowing a tactical radius of, at least, 200 km.


The maximal cruising speed was 340 kph. But the true economical one was 300 kph. 



The climbing times were:

1,000 m         1' 30"

2,000 m         3' 00"

3,000 m         4' 21'

4,000 m         5' 42"

  4,500 m         6' 48" ==> (the time needed by the MS 406 for 4,000 m!)

5,000 m        7' 42"

6,000 m      10' 42"

8,000 m      16' 15"

9,000 m      23' 48"



Above 4,000 m, these climbing times were average: The supercharger of the Mercury engine was clearly insufficient.


Moreover, the dwindling of performances above 6,000 m confirms that 9,000 m was its service ceiling.



If one compare the Gladiator to the Avia B 534 of similar power, one can see a very similar  horizontal top speed but a very faster climb ability of the B 534, the time to 5 000 m of the Czechoslovak fighter being 2 to 3 minutes better than the one of the British one, whose service ceiling was circa 1,000 m lower. 



The Gladiator fighter won the British contest, even if the Bristol 133 contender, with her retractable landing gear, was 
20 kph faster.

The use of a metallic Fairey-Reed fixed pitch air-screw allowed a smoother running of the engine, a slightly better top speed but a lower climbing speed.

The fighter was ordered in July 1935, and the production was sufficient to induce a commercial interest in 14 countries (at the end of the 30's, numerous countries were in need of
fighters, even obsolete ones).

The first mass produced Gladiator rolls out in July 1936. 



Gloster Gladiator I  - 


The 72 squadron (18 fighter) was the first equipped in UK, in February 1937.

In September 1937, eight squadrons had been fully equipped. 

They were the spearhead of the aerial protection of London (at this precise moment, the first series Hawker Hurricane, ordered at mid 1936, was delivered but not operational until February 1938).

Most of the British pilots enjoyed with the good maneuverability of the new fighter, however, those who were coming from Bristol Bulldog equipped squadrons - a fighter having a wing loading of only 55 kg/m² - feel their new fighter too brutal in quick evasive maneuvers and that she was subject to flat spins rather difficult to recover. 

A lot of crashs induced a supplementary order of 28 examples (Source : En. Wikipedia, January 05,  2019).



The Gladiator in action 



The Septembre
 3, 1939 - the date of the WW II beginning - among the 28 squadrons having already used the Gladiator - only 13 were still equipped with her, the 15 others used of Hurricane or of Spitfire.

Nevertheless, a good decision was the transformation of the 
Gladiator in an aircraft-carrier embarked fighter (with an enhanced armament of 6 MG): That was a very better solution than using the 30 kph slower and less agile Blackburn Skua in this role.

The HMS
 Courageous was the first equipped with Sea Gladiator, in May 1939. 


Subject of large exportations at the end of the 30's, the Gladiator was quickly implied in various conflicts.  
I chosen to give a brief, summary of her activities on secondary fronts.



In China, 36 Gladiator have been ordered in 1937 by the Chinese 
government to conter the Japanese invasion (which began in September 1931).

The first combat occurred at the end of February 1938. 


W. Green wrote the Chinese pilots, whose aerial training was minimal and who experienced very odd take off conditions, experienced a lot of problems.

A new management and new methods of aerial training were used, allowing more balanced casualties between Chinese and Japanese pilots (who, actually, were using Mitsubishi A5M fighters).

However, in 1940, Japaneses pilots used of the deadly Zéro fighter...



The Winter War, between USS
R and Finland, was triggered by the invading of Finnish territories by the armies of the dictator Joseph Staline, the Novembe30, 1939. 

Twelve Swedish Gladiator came, in January 1940, to help the 30 similar fighters used by Finland.

During the 62 days preceding the 
armistice signed the March 13, 1940 between the 2 countries, the Finnish Gladiator pilots claimed 53 victories at the cost of 14 fighters

Undoubtedly, the Gladiator outclassed easily the Polikarpov I 15 or I 15 bis.


During the Continuation war, which begun side, by side with Hitler, the Juin 
22, 1941, the Gladiator claimed a unique victory, demonstrating that the surviving aircrafts were only used for advanced training.
William Green (op. cit.) wrote: the British fighter was inefficient against the faster Soviet bombers and against the more recent Soviet fighters (Polikarpov I 153 and I 16)also faster.                            



At the end of the Fall of 1939, during the so-called Phoney War, several Gladiator were sent in France by the British 
government, to "cover" the British Expeditionary Force.

W. Green has written that they achieved several victor
ies but, also "they were inefficient against the faster German bombers and also against the better armed German fighters".
These propositions are not logically compatible...

However, some Gladiator from some coastal regions claimed they had downed one Dornier 18 flying-boat before downing a Messerschmitt 110 fighter...




The real war



The Norwegian Campaign was the precise moment the Gladiator was confronted to the Luftwaffethe worst enemy the Allied had to confront until 1945.

In West Scandinavia (Norway and Danemark), Hitler launched his Weserübung operation, the April 6, 1940, to secure the access of Germany to the 
Kiruna Swedish first quality iron ore supplies.

During the Winter, the North of Baltic Sea - Golf of Bothnia - being frozen, the iron ore needed to be transported by trains until the Norwegian harbor of Narvik, which stays always in free water.

Hitler knew the Military Norwegian 
Aviation was only symbolic, especially when one take into account the vastness of the Norwegian territory (from the North to the South, that extremely rugged country is circa 1,600 km long). 

This Air Force consisted in:
  • One unique fighter squadron --> 12 Gladiator (!)
  • A bout fifty recco-bombers Fokker CV-D, purchased at the end of the 20's, able to carry four 50 kg bombs each, at 215 kph, 
  • Half a dozen of Heinkel 115 torpedo-bombers. 
The prior conquest of Danemark allowed first the securing of the strait of Danemark and the control of the Baltic Sea, but, in the immediate time, it allowed also the shortening of flying distances for all the German aircrafts implied in the Weserübung operation:
  • The distance from Hambourg (Germany) to Oslo (Norway) is circa 710 km, 
  • The distance from Aalborg (Danemark) to Oslo is circa 322 km! 




Copy of Google Earth : Norwegian coasts of the Lofoten islands and of the fjord where is Narvik
- Only very good pilots were able to land in such a landscape! --



Norway being a especially rugged country (see the above map), it was not wise for the Germans to sent there their most performant airplanes but the tough Stukas (Ju 87).

They rarely used their Messerschmitt Bf 109 E preferring their longer ranging Bf 110 to protect the precious Heinkel 111 and Stuka Ju 87.




Naval operations


The German operation impl
ied the Kriegsmarine to transfert thousands of soldiers able to capture the most important Norwegian harbors.

At this precise date, the German ships might hardly count 
on an aerial cover during the transit to Narvik (Northerly to the Polar Circle).  

The good luck of these ships resided in the Allied incapacity to gather most of their aircraft-carriers for their own counter-attack operations.

At the dawn of the April
 9, 1940, six German fleets proceeded to each key harbor:
  • Ten German destroyers had to disembark about 2,000 mountain troops by surprise at Narvik. This very important convoy had to conquer the strategic heart of this campaign, so, it was escorted by the up to date and very powerful battle cruisers Scharnorst and Gneisenau
  • The Admiral Hipper heavy cruiser and four destroyers disembarked their troops at Trondheim; 
  • The Köln and Königsberg cruisers as also some logistic ships went to Bergen;
  • The Karlsruhe light cruiser and some smaller ships went to Kristiansand; 
  • The Blücher heavy cruiser and the "pocket battleship" Lützow (ex-Deutschland), the Emden light cruiser and some other light ships should proceed to Oslo; Other mountain troops and paratroopers were carried by the Luftwaffe
  • Four minesweepers proceeded to Egersund. 


Position of the Weserübung key-harbors


Always, but at Oslo, the Norwegians were totally surprised. In all other places, they were also totally unarmed when the German soldiers appeared.

At Oslo, the alarm was activated in real time because all the local deciders were very experienced and very aware of their duty. 

These men were responsible of the 280 mm cannon batteries and of the torpedo launchers which controlled the entry of the Oslo Fjord d'Oslo.
They identified instantly the threat and sunk quickly the Blücher, inducing a partial retreat of the remainder of the fleet and delayed the disembarkation of the soldiers and the capture of the Norwegian capital for at least 24 hours.


Aerial operations


All the 
Norwegian fighters  were at Oslo. 
Some crash being experienced during the training, only seven Gladiator were actually available.

These Gladiator were confronted to the Luftwaffe which had sent thirty Junkers 52 to drop or to disembark paratroopers on the 
strategic sites allowing the control of the Norwegian capital.

The German transport airplanes were protected by Messerschmitt 110 and a significant amount of Heinkel 111 were dedicated to support them.


Very quickly, the Gladiator downed 5 enemy aircrafts(1 Ju 52, 2 Bf 110 and 2 bombers), at the cost of one Norwegian fighter. 


Such a balance was excellent, especially when one take into account the fact that all the downed aircrafts were multi-engined and 4 among them were a very faster than the biplane fighters: The Norwegian pilots need to destroy either the two engines or the enemy pilot to obtain a victory!

Other downed German aircrafts were claimed by AA fire servants. 

In such an occasion, I must remember the words of a French fighter pilot: "An enemy aircraft damaged by the fighters is an easy prey for the AA fire".




Two German bombers (He 111) downed in Norway 


A bit later, 2 Gladiator, not efficiently camouflaged, 
were destroyed by strafing during their refueling.

The four last remaining were sent to frozen lakes, but, without refueling and devoid of tactical informations, they stay there and were later destroyed by the enemies.

The total lack of secondary airfields demonstrate clearly the political Norwegians authorities had never imagined their country would become a war theate
r (!).


Astonishingly, the 
Allied operations in Norway, although long-time premeditated at London (since more than one year in the British Admiralty), did not start until April 10, 1940.

Such a slowness of British reaction was clearly correlated with the extremely weak character of the Premier Neville Chamberlain whose conceptions were totally belied by the real facts since March 1939!



The first British strikes occurred when 16
 Blackburn Skua attacked the German ships at Bergen, after a rather long trip, with a one-way leg of nearly 500 km.

This mission was successfully completed with the sinking of the Koenigsberg light cruiser!

But the real purpose of the Allied, Narvik, was too far away for either the Fleet Air Arm or the actual RAF. 
Such an offensive action needed imperatively of aircraft-carriers.

Yes,
 the September 3, 1939, the UK entered war with 7 aircraft-carriers (exactly the same amount than the USA): 
  • Argus,  
  • Glorious
  • Courageous
  • Furious
  • Eagle
  • Hermes,
  • Ark Royal.

Unfortunately, a lot of mistakes had deprived the Royal Navy and the Fleet Air Arm of the Courageous, sunk by a German U-Boat.



You may object that, at this precise moment, 
France had actually two carriers, the Béarn and the Commandant Teste.

The very short sighted conceptions of the deciders in the 
French War Minister have embedded our aircraft-carrier in the stupide mission of terrestrial aircraft transporter (from USA to Casablanca).

Nevertheless, our Spad 510 were still efficient and, with minimal adaptations, they would have been very useful on board of the Béarn, giving an real air cover to the Allied operations.

The handful of existing LN 40 dive bombers would have been also very efficient against the German cruisers.

The Commandant Teste was an excellent sea-plane carrier (up to 25 aircrafts), with 5 cranes and 4 catapults.




The Commandant Teste - 



She had a decent AA fire armament, especially twelve 
100 mm canons of 45 calibers with a vertical range of 10,000 m.

Her total range was 8,500 nmi (De. Wikipedia) and she was able to destroy - or disable - 
significant amount of ennemis ships at several hundreds of kilometers.

The main criticism about her was a rather low top speed (22 kts during trials): The seamen deciders cannot, actually, imagine that such ships were already their real capital ships!

Her excellent Latécoère 298 torpedo-bombers flew at 300 km/h and were able to stop any fleet passage as far as 500 km or destroy U-Boats with bombs.



Among the British carriers, the Furious was available.

Protected by the Warspite battleship, she carried only 18 
Swordfish torpedo-bombers, being devoid of fighters.
That was an amazing choice, knowing she may carry from 36 to 48 aircrafts!

The April
 12, after the bombing of German captured ex-Norwegian ships for the loss of 2, the Furious needed to refuel at Tromsö.

During the trip, her Swordfish bombed a frozen lake were numerous Junkers 52 were landed: Two Ju 52 were destroyed, several other were
 damaged. 

The
 April 18, the Furious, still devoid of fighters cover, was attacked, likely as a retaliation operation, by a unique Heinkel 111 which damaged her very seriously, limiting her top speed to 20 kts.

She went back to Tromsö but was forced to return to UK for more serious repairs.

These works lasted until the May
 18, when she had to leave to Norway with a squadron of Gladiator which had to be based at Bardufoss (80 km North of Narvik), keeping on board 6 Sea Gladiator and 9 Swordfish for her own protection (at last!).


The
 April 24, another British aircraft carrier, the Gloriousreturned from the Mediterranean theater, entered at last in the Arctic Ocean operations.

The carrier ferried the squadron 263 with 18 Gladiator which landed on the ice of the frozen Lesjaskog lake, in the South west part of Norway.

On Avril
 25, 2 Gladiator downed a Heinkel He 115 torpedo-bomber.

The Germans, for the loss of 3 bombers,
 bombed the lake were the British fighters have landed. 

Only 5 five fighters stayed available, many casualties occurred among the pilots. The squadron 263 needed to be evacuated to the United Kingdom.

Once the wounded pilots 
treated and the destroyed fighters replaced, the # 263 returned to Norway, landing at Bardufoss the May 25.


The same day, the Ark Royal aircraft-carrier, equipped with Blakburn Skua, shared also the aerial cover of the fleet.

The Allied operations continued despite the enhancement of the German forces. 


The arrival of Hurricane, too late, was insufficient to change the game. 

The 3th of May, France suffered the loss of the Bison destroyer, powerful but weakly defended against aerial attacks with only four 37 mm cannons and some 13.2 mm machine-guns (!).

However, after disembarking the French and Polish units, the Allied might, at last, use of modern Hotchkiss H 39 
tanks which were useful to free Narvik, the May 28.

This victory occurred too late, the Battle of France was badly engaged and all Allied soldiers and materials returned in Great Britain. 

{Fortunately for us, the 12 Hotchkiss H 39 then rescued played a historical role, because they were later assigned by General De Gaulle to the general-to-be Philippe Leclerc de Hautecloque who used them in the beginning of his fight against the troops of Mussolini in Libya (1940-1941).}


The worst defeat of the Royal Navy during the 1940 year occurred the June 8, 1940, in front of the Kriegsmarine: It was the total loss of the Glorious aircraft-carrier with her two very courageous escort destroyers and the death of 1,500 seamen. 10 Gladiator were inboard, as also 5 Sworfish. None of them was used!



The Gladiator fighted gallantly in the Mediterranean theater, especially at Malta, against the Regia Aeronautica, later en Greece as also in Syria, the Vichy Air Force.

These fighting were not easy, nevertheless, e.g. the victories on the Fiat CR 42 have been obtained on aircrafts totally devoid of radio!


The Battle of Malta was the proof that Benito Mussolini, as also most of his high ranking officers, shared a very short strategic sight.

Malta was not only a British 
colony, but was also the hub of all the informations (by submarine cables) coming from Balkan, Middle East, North and East Africa and Asia.

Moreover, these islands constituted an incredibly safe anchorage for a battle fleet.

Who holds Malta holds the Mediterranean Sea!


Logically, the first duty of Mussolini, instead to attack the French 
Alpine "Ligne Maginot" on the June 10, 1940, would have been to send his better soldiers at 100 km of the South Sicilian coast to conquer the powerful Maltese lock.

In such a case, any British fleet which would tempt the crossing from Gibraltar to Suez would have experienced huge losses. 


Fortunately for us, this never occurred.

During the first month of the war against Italy, the Regia Aéronautica was not very active on Malta because it was very engaged over France near Toulon, in the Alpes - where the weather was very stormy, inducing heavy losses - and in North Tunis
ia.




Tactical situation of Malta


Moreover, the Italian attacks against Malta were not sufficiently efficient for the British airmen who have been confronted to the Luftwaffe at Dunkirk. 

A bit later, the arrival of 
Hurricanes was a bad news for the crews of the Italian bombers.


For me, it's amazing the Gladiator were never based in Australia, at the moment of the enhancement of a true will of conquest was very clear in Japan. 


This biplane fighter would constitute an excellent learning tool to create an great Royal Australian Air Force (which was created mainly by the US).



Marmaduke Pat Pattle was the most famous among the 
Gladiator pilots. 

Flying the Gladiator since May 1937, he was already an experienced pilot before the outbreak of WW II.

In 1940, he went in Balkan to help the Royal Helenic Air Force against the Regia Aeronautica

Confronted from the beginning to the Italian pilots, he downed more of them than German ones, who entered war against Greece only some weeks before the operation Barbarossa (the invasion of USSR).

In less than one year, he obtained 15 victor
ies with the Gladiator and 35 others with the Hurricane Mk I...


As Squadron Leader, he was very demanding with respect to his pilots, especially a high concentration on mission as also a great flight discipline.

His fighting time lasted only 7 months from the 4th of August 1940 to the 20th of April 1941, the day at which he was downed by a Bf 110 near Athens!


One may dream to his score if he as benefited from a Spitfire...


In Syria, les Gladiator appeared dangerous for the Vichy Dewoitine 520, damaging seriously the Dewoitine 520 of the great French ace Pierre Le Gloan, after he had downed one Gladiator.



Conclusion #1


The history of this completely obsolete fighter highlights two lessons:
  • Better an obsolete fighter than no fighter at all. Obviously, the tactics used must take into account the better points of the fighter and a thorough training is of paramount importance
  • However, the definitive obsolescence must be detected. After that, the fighter cannot be used in her fighter role (but for training or for ground support).
For the French, and especially for me, the Finnish example during the Continuation War, demonstrated that the Morane-Saulnier 406 was an even better fighter than the Gladiator




Conclusion #2: One very big regret...  


Some months after the maiden flight of the Gladiator, the engineer Folland created a brand new fighter using the same engine, the Gloster F- 5/34 which was christened "Noname Fighter" by the Gloster personals

This fighter was 9.76 m long.

She was weighting 1,900 kg empty and 2,450 kg for take off.

The wingspan was 11.63 m and the total wing area was 21.26 m², so the wing loading was 115 kg /m².

This wing loading was intermediary between the one of the operational Hurricane Mk I  and of the first operational Spitfire MK I.

{English Wikipedia published 88 kg/m² but this is not possible, considering the other data.}

Using the same 840 hp Mercury engine than the Gladiator, the top speed was 508 kph at 4,875 m.

The total range was 850 km.

Her climb speed to 6,000 m was 11 minutes, very near to that of the very lighter Gladiator, and her service ceiling was 10,000 m.


The maiden flight date appears to be very classified (!), but excellent pictures were published in the Flight release of the June 24, 1937, especially the one displaying a "Noname Fighter" breaking very near from the tail of a modern bomber. 

That was the proof the pilot was absolutely confident to the aerodynamic reaction of his fighter in mock combat!

So, I'm doubting a lot when En. Wikipedia is publishing a maiden flight at the end of 1936 (you will also fund a maiden flight in December 1937! LOL).

Fitting a narrower but more powerful engine like the 1050 hp P & W 1830, the Gloster fighter would have a top speed of 547 kph, very near than the operational Spitfire Mk I.


Pressure were  exerted on Folland to slow his work on the Noname, the Gladiator being so important!  
Unfortunately, this is totally wrong, the first squadron was Hurricane equipped only in February 1938 (following the same source)! 

This very promising fighter was nevertheless very praised by her test pilots:
  • She was more maneuverable without the heaviness of the controls usually encountered at high speed;
  • She took off after a shorter ground running and she had a better climb at low altitude than all the other British fighters;
  • She displayed a very better all-round visibility than all others British designs!


                                         
The Gloster F 5/34 Noname Fighter. The fore part may had some family aspect with that of the A6M2 fighter



Knowing how exaggerated were the published speed performances of the Hawker Hurricane Mk I :
  • Air Marshall Dowding giving 490 kph instead of the 525 kph claimed with the Rotol airscrew, 
  • The Gloster F5/34 Noname Fighter would have allowed a very better service during the Battle of France as also in BoB.

A French friend had recently published a good explanation: The Gloster company was the property of the Hawker trust from 1934. 

This is enough, but this is the demonstration than Hawker did not really take into account the actual interest of the British fighter pilots...

One may imagine how more performant should be a Noname Fighter fitted with the significantly more compact and more powerful Pratt & Whitney 1830 engine !




Sunday, April 7, 2019

The Avia B 534, a very strategical biplane fighter (Revised the 07 / 11 / 2020)


In 1938, for France, the common sens would have been to go to war with Hitler's Germany, even without any approbation of our British Allies. 

The rationale is as follow. 

Theoretically, France had, actually, two allies on the East part of Europe: Poland and Czechoslovakia. 
If the first one was much more populated, the second one had numerous military assets!

But the Poland dictatorship suffered of huge tactical weaknesses:
  • Its territories were open to most of its potential enemies (USSR and German Third Reich):
  • A completely obsolete military policy:
    • no sufficiently numerous and efficient armored vehicles,
    • no efficient and sufficiently numerous fighter planes, 
    • too few bombers, 
    • an amazingly scarce artillery endowment  for their numerous Infantry divisions (1/5 of the German ones!),
  • A foreign policy deliberately hostile to its most powerful neighbor, the USSR, and, simultaneously, no real allies.


Physical map of the today Poland: The Westward  shift of Poland by the Potsdam agreement, logically, annihilated the East Prussia. But the mountains stay only in the South, protecting Poland only against Czechoslovakia!


Military speaking, Czechoslovakia was in a considerably better shape than Poland, with a real Air Force, good tanks and armored vehicles.

So, we may focus our attention on an amazing Czechoslovakian fighter, the Avia B 534, which was really superior to the more recent British Gloster Gladiator

The huge moral weakness and the short sighted policy of many French (and British) politicians forbade us to see how this fighter was a game changer, if used at the right time.



A really useful biplane fighter


This little fighter have been designed by the Czech engineer František Novotný.

She was of classical structure, built with welded high tensile steel tubes with fabric covering, as was also the British Hurricane fighter.

She was 8.10 m long and weighted 1,440 kg empty and 1,980 kg for take off.

The wingspan was 9.40 m and the total wing area was 23.56 m². So, the wing loading was 84 kg/m², allowing an excellent maneuverability.


The engine was a Hispano-Suiza 12 Ydrs licence produced by Avia and delivering 850 Cv at 3,200 m.




-Avia B 534 of the 3rd series -  The air intake was designed to overcome the boundary layer problems, but the radiator seemed not to take into account the Meredith effect, unfortunately.



The first flight of this fighter was successfully made the
 25 of May, 1933. 

Immediately, the engineers understood this aircraft had even better potentialities and the following prototypes were significantly perfected and series production was ordered in 1934.  

The fuselage was well streamlined, allowing a top speed of 395 kph (in the literature, you may found from 37 kph to 410 kph following the variants). 

With backward exhaust pipes, this fighter would have been able to fly at list 15 kph faster! 

The maximal cruise speed was 345 kph. The total range was given from 500 to 580 km following the sources (The two fuel tanks totaled 347 liters).

An other source have given an economic cruising speed of 300 kph.

The B 534 was typically a target defense interceptor as were also the Messerschmitt 109 and the Spitfire.

The main asset of this fighter was an amazingly good climb speed:
  • The service ceiling was 10,600 m (to be compared to the 8,000 m of the Polish PZL 11C).
  • The time for 5,000 m was 5' 30" (some sources wrote 4' 28"), i.e. from 1 to 2 minutes faster than the Messerschmitt 109 E of May 1940!
The armament gathered four 7.92 mm machine guns and was very similar than the one used in the Gloster Gladiator, but with a 80 m/s faster muzzle velocity.

{The B  634 was the last and the best streamlined variant of the Avia biplane fighter. 

But, at the time this prototype was flying, Avia unveiled the B 35, a monoplane fighter which used a fixed landing gear. 

This new fighter demonstrated excellent flying qualities and her top speed exceeded those of the B 534  by 100 kph. 

Unfortunately, during a fly past at low altitude and at very high speed, the test pilot, not accustomed to such a speed; tried a too tight maneuver, triggering the fatal crash of his aircraft.


Facing the Avia B 534, Germany may used initially of early Messerschmitt 109 C or D whose engines delivered about 700 hp, weighted 350 kg more for take off and were using of a similar armament.

Monoplane and fitted with a retractable landing gear, these Bf 109 variants were able to fly only 50 to 60 kph faster than the B 534.
However, their climbing time was, by far, not so good, their operational ceiling was 2,000 m lower, these two flaws allowing the Czechoslovakian pilots to catch them by surprise. 
As they were also very far to demonstrate a maneuverability similar to the one of the B 534

Moreover, in July 1938, 50% of the Bf 109 were unable to fly: In other words, entering simultaneously in war with France and Czechoslovakia in the Fall of 1938, the Hitlers's Germany had no "roof" to protect the German peoples from any aerial strikes.

The Czech pilots who fought brilliantly in France from 1939 to June 1940 demonstrated theirs excellent qualities of fighters pilots, of their excellent marksmanship and of their good tactical sense.

In the case of aerial battle, the Messerschmitt fighters facing the B 534 would have been in a very similar situation than the US P 40 fighters against the Japanese A6M2 Zéro fighters in 1942.

The only advantage of the German fighter pilots was their excellent Freya radars, once they were operating! 

Nevertheless, in his war memory, Adolph Galland reported, in the beginning of the Phoney War (in the Fall  of 1939), a scramble of all the wing after an alert, this resulting of the downing of a Bf 108 Taifun in which was a high ranking Luftwaffe officer! 




The Czecoslovakia war (starting point for a possible What if...)

Caution : Any "What if" is a pure fiction. 
This may be used as a demonstration that, at a precise moment in the History, other choices would have created a completely different fate for a lot of peoples in numerous countries.

I'm ignoring the degree of efficiency the Sudetenland peoples might exerted in sabotaging the capacity of the Czechoslovakian Army: That is the main objection to my "What if...".


The possibilities of the Avia fighter as I described previously regard only the 1938-1940 period and facing the Luftwaffe.

The real question is: Was France really at risk against an overwhelming Wehrmacht at the end of 1938, when French Premier Daladier was still wanting to save Czechoslovakia?



Some real facts 


In 1938, Czechoslovakia was the most powerful and the most reliable Ally for France since 1918 (remember, since the 20's, United Kingdom favored the German rearming and, simultaneously, was repeatedly objecting against our own rearmament).

From a tactical point of view, Czechoslovakia was in no way a flat country.

The Czech part is almost entirely surrounded by mountains and the Slovakian territories consist mainly in mountainous regions, excepted in the plain where flows the Danube, which is also a mighty natural break.



Mountainous terrain of Czechoslovakia in 1969 (very similar to the one of 1938) -


Moreover, the numerous forests reduced the capacity to detect troop displacements on the ground.

So, the penetration of an enemy army in such a country was not a walk in the park (I personally knew, in 1965, a Hungarian scientist who had fought successfully against the Wehrmacht together with the Slovakian Resistance in Slovakia)! 

For the Wehrmacht, it might appeared rather similar to the penetration in a very large Ardennes massif (alone, the today Czech Republic has more than twice the total area of Belgium). 

Nothing to see with Poland (in August 1965, I was driving car in these two country: The Czech roads constituted a much better training area than the Polish ones!) 


From the other hand, the Czechoslovakian fortifications were not so easy to break through

General Guderian (in Heinz Guderian, Erinnerungen eines Soldaten) wrote, after WWII, these fortifications were not so impressive than it was commonly said. 
Nevertheless, he wrote also the Wehrmacht would have experienced too much unnecessary human casualties.
It was especially true because the Czechoslovakian Army had already mobilized 33 divisions in 1938
That is very differed greatly from the Polish army which, in Septembre 1939, began only to mobilize troops after the entry of the German troops in Poland.

The Czechoslovakian armored units totaled about 350 Skoda LT vz. 35 tanks, fairly armored, fast, well armed and easy to handle. They appeared as equivalent to the Pz III.




Škoda LT vz 35 : Agile, reliable, fitted with a 37 mm cannon (V0 of 675 m/s), these tank was able to destroy easily almost all German tank Pz I, Pz II and Pz III. Its only dreadful opponent was the Pz IV (which was far from operational status).


Czechoslovakia was about to use of a even better tank, the LT vz. 38.

Today (and repeatedly), several authors wrote an inappropriate argument: They argue that 350 tanks of the armored Czechoslovakian Army could be overwhelmed by the 1,900 German tanks available in 1938. 
These so-called tanks gathered only Pz I and Pz II which were, in fact, only light armored vehicles devoid of efficient armor (the thickness exceeding rarely 16 mm in 1938). 

So, each Czechoslovakian tank would had no difficulty to destroy them in great number.

(Remember, on year later the Polish soldiers destroyed a lot of them with their Boys anti-tank riffles.)

The Panzers III were at an experimental status (and were vulnerable to the Czech 37 mm cannon) and the Pz IV was in an even less advanced status



A German author, Mr Milan Hauner, highlights very thoroughly all the difficulties occurring for Czechoslovakia facing the Wehrmacht in September 1938. 

He appears to neglect the Czechoslovakian Air Force, on the pretext that this force consisted mainly of biplane fighters Avia B 534 and that it gathered only 200 bombers.

But that was not true in the Summer of 1938 : The Czechoslovakian "fighter command" was a very rude adversary for the actual Luftwaffe.


The meteorological factor was also completely absent from Mr. Hauner's conceptions. 
In Fall, France is subject to succession of meteorological depressions which carry a lot of nimbostratus (storm clouds) displacing following mainly a West - East direction
This might have very strong repercussions on the managing of any aerial warfare: The French airmen would had the knowledge of the future weather that the German ones could not have.

In Czechoslovakia, e.g. at Prague, the first days of October may be rainy, later, the weather became a little more sunny, with frequent morning fogs (which favored ambushes). 

During the following weeks, the temperatures decrease strongly. 

Winter begins really in November with numerous snow falls.

Likely, the Germans should attempted to intimidate the populations, using the bombing of the largest city of the country, as they do in May 1940 at Rotterdam

Today, we know the Wehrmacht of 1938 was not "winter proof"!

Anyway, Germans must have sufficient forces to confront with France, this implying to conserve a lot of bombers and fighters. 

Germany was absolutely not immune from Czechoslovakian raids! 


Inside the Luftwaffe, the Dornier 17 D / F bombers were almost all involved in the Spain Civil War where their performances were seen, in 1938, as no more efficient.

In Germany, some 500 examples belonged to the Dornier 17 M / P variants, and the B variant was just about to be delivered.


The much more powerful Heinkel 111 C might be specialized for the long and fast offensive raids. 
They would likely be used for French objectives (insofar the French military deciders demonstrated a strong reaction).


In 1938, the twin-engined Junkers 86 was the most frequent German bomber with 600 examples. 

These aircrafts were 18 m long and had a take off weight of about 8,000 kg.

The wingspan was 22.50 m and the wing area totaled 82 m², allowing the very low wing loading of 100 kg/m². 





Junnckers 86  A or D - 


The two diesel engines Junkers Jumo 205 C-4 of this bomber delivered 600 hp, allowing a normal bomb load of 800 kg.

Her top speed was 325 kph at 3,000 m.

The service ceiling of the Ju 86 was 5,900 m : So, the normal flight level had few chance to exceed 4,000 m. 

In top speed, the Junkers was similar to that of her French counterpart Bloch 210 but her bomb load was 50 % of that of the Bloch and her ceiling was 60% less high... 

This bomber had no chance against the Avia B 534.

{Parenthesis: In Wikipedia, you may found essentially informations on the  stratospheric variant Ju 86 P which did not exist at all in 1938. 
This high altitude recco-bomber was first seen over Great Britain, during the final part of BoB, demonstrating an operational ceiling of 12,000 m without opponent before 1942 until the Spitfire Mk VII entered operational service.
If this bomber variant was technically interesting, its strategical interest was rather weak.}


OK, in 1938, Germany had about 1,300 to 1,500 bombers, but the Jagdwaffe had only 600 Bf 109 with a doubtful reliability (50% were not available in July 1938).

As wrote Adolphe Galland after WW II, politicians and generals always imagine the Mastering of the Air may be obtain only by bombing

Nevertheless, once their bombers will be flying towards the enemy territoriesthey became the preys of the enemy fighters, but when they benefited from a strong protection

At the end of October 1940, Hitler was forced to fall back on the less effective night bombing to stop the loss of bombers and of their valuable crews, decimated by the strong aerial battles occurring from the May 10, 1940 to the Fall of that year (Battle of Britain).


In the case of an aerial offensive against Czechoslovakia, and taking into account a strong reaction of France, Germany would have no real allies :
  • Poland would stay neutral, with a focus against its Ost boundary with USSR.
  • Italia would be also neutral, but with a temptation to enter in Albania.
  • The Great-Britain would have been divided between pro-Hitler and anti-Hitler. It would be not easy for Mr Chamberlain to condemn France and Czechoslovakia without tarnishing his international image . 
The Czechoslovakian fighter pilots might used of classical interception schemes

The climbing to 5,000 m with the B 534 consumed about 5', so the German bombers were attacked 10 to 15 minutes after the take off of the B 534

We know also the German bombers of 1938 suffered a strong adverse influence of the bomb load on their top speed : A fully loaded He 111 was unable to exceed 300 kph...) .

The attacks of the Czechoslovakian fighters on the German bombers could result in a better score than the one obtained by French and Allied fighters achieved the May 10, 1940.  

Such good result of the better climb speed of the B 534, on the clearly slower German bombers as, also, in the division of the existing bombers in two fleets: One for the French front and one for the Czech front. 

One may also take into account the Jagdwaffe was, in 1938, about one third of the power facing the Allies in 1940. It would also have been necessarily divided in two.

The 20 to 80 Potez 630 and 631 long range fighters, already in service in the French Armée de l'Air, being as fast as was the Bf 109 D, they were not easy prey for them, so, some of them they might play an in-flight early warning role

If the French fighting planes have consisted in Nieuport 161, the mastery of the Air would have been instantly achieved.

Nevertheless, in the historical case the Curtiss H 75, D 510, D 501 et Spad 510 would have been also extremely dangerous for the Luftwaffe.

In the case of an Allied attack, the Bf 109 C / D needed 8 minutes to reach the same altitude (10 minutes for 6.000 m). 
They had an as short range than the Bf 109 E of the Battle of Britain because their fuel tank were of smaller dimension (337 liters)...


 The Czechoslovakian bombers 


Some sources attribute 200 bombers to the Czechoslovakian Air force.
For the End of the 1938 Summer, it had :
  • 54 Bloch 200 bombers, seen as rather efficient for night bombing. They had, in the Czechoslovakian production only, a more important bomb load of 1,400 kg (instead of 1,200 kg in the French production) and 5 machine guns (instead of 3 in the original product) for its defense . 


    Document of  the author - a French MB 200


    • About 60 Tupolev SB for daylight bombing, able to deliver a bomb load of 600 kg , 


    Tupelev SB - from 425 to 450 kph.

    • At least, 400 Letov S 328 biplanes able to recce and bombing missions (with a  bomb load of 500 kg). The exceptional  maneuverability of these Letov 328 would favor their use for harassing the enemy columns, as the Germans will do with their rather similar Henshel 123.


    Letov 328 - 


    Quid of the USSR? 


    The Soviet Union wanted a free passing through Poland territories in order to go to Czechoslovakia. 

    If France had a real high level foreign minister, instead of the poor Mr. Georges Bonnet, it would be possible to answer two point to the Stalin's demand:
    • France will be an active player in this crisis. So, all European countries would clearly understand who will be their real allies against Hitler.
    • Nobody was able to prevented URSS land troops in Eastern Prussia.
    Such an intervention, taking into account the strong Prussian predominance in the high ranking officers of the Wehrmacht, Hitler should necessarily divert a lot of military means to salvaged the birthplace of the Teutonic Knights...


    At this moment, USSR disposed of a non negligible fleet of submarines, cruisers and destroyers (and even of rather powerful battleships) which might represented a thread for the Kriegsmarine in Baltic.

    From the other hand, the Red Army had several thousand of T26 and BT tanks, which appeared very powerful in 1938. 

    They were very fast (Christie suspension) and they had a 45 mm cannon efficient at more than 1 km.




    Soviét tank BT 5 - The triumph of the Christie suspension: 72 kph on the wheels, 52 kph on caterpillars)


    The Soviet Aviation was very numerous with some thousand of fast fighters as the Polikarpov I 16 and of SB bombers faster than the German bombers and hard for the German fighters.





    Tupolev TB 3  - A very heavy bomber loaded with two  fighter-bombaers I 16 (with two 250 kg bombs each) displaying her capability to carry a load of 5 tons (in 1941) !



    USSR might use also of 800 bombers Tupolev TB 3 able to carry easily 5 tons of bombs, or dozens of paratroopers. 

    This bomber was 25 m long.

    Her wingspan was 40 m and the wing area exceeded 230 m².

    She had a weight of 12,600 kg empty and from 19,000 to 24,000 kg for take off (following the variants).

    She had a top speed of 288 kph at 4,000 m (source : Wikipedia in deutscher Sprache of the March 9, 2019).

    There were no difficulty for 350 TB 3 to carry 8,000 of para troopers over Eastern Prussia after an intense night bombing!




    The French Armée de l'Air 


    For the 1938, the bomber units of France used of:
    •  190 Bloch 200 (for night bombing), 
    • 140 Amiot 143, 
    • 150 Potez 540, 
    • 240 Bloch 210, 
    •   60 Bloch 131,
    •   30 Farman 222-2.

    France had about 800 bombers.

    Knowing that fourteen Amiot 143 have been send at daylight, the 14 of May, 1940, over the Sedan town occupied by the Guderian's Panzer divisions, while flying at only 750 m AGL.

    Knowing that except the two bombers downed, and one landed in the fields inside the French lines, the others bombers, severely damaged, returned to their airfield (but were not repaired). So, the real score was 3 absolute losses and ten damaged bombers...

    OK, they have been escorted by 12 MS 406 (!).

    Are you thinking seriously these bombers would have suffered more losses against the 1938 Jagdwaffe than 2 years later, facing better armed and 100 kph faster fighters?

    Ok, the survival of French bomber crews would have been very better if the Bréguet 462 have been ordered at the end of 1936 and the Amiot 340 during the Summer of 1937.



    Epilogue and provisional conclusion


    Early in 19398, the Czechoslovakian government proposed to sell to France, for a very low price, 200 Avia B 534 (source: L'Aviation de Chasse Française, 1918-1940, Cuny & Danel, Docavia #2, p. 144). The proposal was exceptionally interesting.


    Unfortunately, the French deciders refused, because they were not aware of the great chance that was for our armies: Such excellent fighters were available for numerous very useful first line purposes.
    The Morane 406 were very few (25 copies delivered for the end of 1938) and also completely outclassed by the Spad 510, which was slower than the Avia fighter.

    After the availability of new and better fighters, the Avia B 534 could have been used in a secondary defense line, 150 to 200 km inside the French boundaries.



    Even bigger mistakes have been done by Mr Daladier during the Sudeten crisis
    They were announced by the inappropriate Vuillemin's visit in Germany.

    This honest man was not able to decipher properly the brain of the completely dishonest Marshall Goering! 

    Instead, our general might have visited Prague and Bratislava.
    • The first mistake was to refuse the tripartite discussion with USSR and Czechoslovakia. Some tactical agreements were easy to finalize. The literature said sixty soviet divisions were ready to help the Czechoslovakian army...
    • The second mistake was to follow the English politician Neville Chamberlain in his completely unrealistic proposals!  The French Premier had only to refuse any discussion on Czechoslovakia in the absence of this country and of the USSR.
    • The last mistake was to wait before the order of mobilization of the French Army. Hitler's generals were not happy to resume the World War. Some seemed ready to eliminate their Fuehrer. Our capitulation was seen by these persons as a demonstration that Hitler was right!...

    I want, at last, to highlight the extraordinary short geopolitical sighting of Colonel Beck, the 1938 minister of Poland. 

    Mr Beck, instead of backing the Czechoslovakianbacked the German point of view in order to obtain the Teschen town as a tips

    Obviously, the Wehrmacht attacked the Poland, with the help of USSR.

    Without any immediately active Allies, Poland was defeated in three weeks...