tag:blogger.com,1999:blog-2234859350538626498.post1740546000205663390..comments2024-02-03T09:29:43.275-08:00Comments on Flashback on glorious planes: The Dewoitine D.520 - Politics and proficiency in complete opposition (Enriched 26 / 11 / 2016)Drixhttp://www.blogger.com/profile/13286966270077187785noreply@blogger.comBlogger6125tag:blogger.com,1999:blog-2234859350538626498.post-21718833817694877272016-11-28T00:58:21.852-08:002016-11-28T00:58:21.852-08:00Good day and sorry to be insistent.
I would just ...Good day and sorry to be insistent.<br /><br />I would just to inform you and who reads this blog that I got a complete answer for first three questions:<br /><br />https://ww2aircraft.net/forum/threads/dewoitine-520-technical-details.45909/#post-1299631<br /><br />that I would share here.<br /><br />So D.520 pilots could take advantage from slightly deploying flaps during combat and, maybe, shorten takeoff run by a further extension.<br /><br />Oddly, there's no record of their complaints about negative-G cutoff while following Bf 109 in sudden dives, like did their British collegues about Spitfire and Hurricane.<br /><br />At least, now we have a more complete historical picture, I think.<br /><br />Thanks for all the help,<br />greybeardAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-2234859350538626498.post-47380144494171314522016-11-26T09:19:43.736-08:002016-11-26T09:19:43.736-08:00Hi Drix and thanks again for further info.
You ar...Hi Drix and thanks again for further info.<br /><br />You are right: inverted flight is just one of negative G conditions; I was wrong, sorry.<br /><br />Lack of mixture lever, as well as of EGT, looks like a good hint to guess an automatic device to adjust mixture.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2234859350538626498.post-5720320068906609962016-11-26T06:17:59.013-08:002016-11-26T06:17:59.013-08:00As you know certainly, France was completely occup...As you know certainly, France was completely occupied by Germans in November 1942 in retaliation for operation Torch.<br /><br />The Germans used of D 520 for the training of their young pilots and recovered all the flight manuals. The Armée de l'Air in French North Africa used some surviving D 520 but, after the Libération, the D 520 flew back to France.<br /><br />Very few were in good conditions and their flight manuals where not sufficiently conserved. <br /><br />I do not agree with you for inverted flight, which is a -1 G flight.<br /><br />On the flight panel of this fighter, there was no EGT nor mixture lever. <br /><br />Remember, for French deciders, the only enemy was Germany, and the target of the French bombers were at most at 500 km from the French bases...<br /><br />Drixhttps://www.blogger.com/profile/13286966270077187785noreply@blogger.comtag:blogger.com,1999:blog-2234859350538626498.post-39400604234114799082016-11-25T15:39:20.741-08:002016-11-25T15:39:20.741-08:00Good evening and thank you very much for your kind...Good evening and thank you very much for your kind answers!<br /><br />It's a pity not to have a D.520 flight manual to check about the use of flaps.<br /><br />I guess that inverted flight and negative G's are not quite the same thing, and, as such, managed in same way. I think negative G's were definitely dealt with by injection carburetor, having no float chamber (the one flooded with fuel in such condition). I read an earlier version of HS 12Y (that mounted on VG.33) had float carburetors...<br /><br />Again, a flight manual would have helped also about leaning the mixture, as well as a detailed description of cockpit left side (was there a mixture lever?).<br /><br />Again a big thanks for your cooperation.Anonymousnoreply@blogger.comtag:blogger.com,1999:blog-2234859350538626498.post-49521935970490704242016-11-25T02:02:44.971-08:002016-11-25T02:02:44.971-08:00Hello !
Your 4 questions are all relevant.
The o...Hello !<br /><br />Your 4 questions are all relevant.<br /><br />The only one I can answer clearly is the #3: Yes, the D 520 used full automatic propellers, the Ratier electric one in a first time, a more easy to adjust Chauvière one later (which was unfortunately nos as good for speed performances as the Ratier).<br /><br />Regarding the three other questions, I have no such precise answer.<br /><br />For the #1 question, I never read anything about the use of the flaps during combat. <br /><br />Nevertheless, the concept of combat flaps was known in the French aeronautic reviews at least from 1936, because the Mureaux 190 and the Hanriot 220 were explicitly fitted with!<br /> <br />Perhaps, the victories of Adj. Pierre Le Gloan against 4 Fiat 42 biplanes in June 1940 were explained by such a practice ?<br /><br />The #2 question is very interesting, but I never read any mention of G cut in any French pilot combat account. <br /><br />Moreover, in the beginning of the 20's, the French pilots were frequently confronted, in aerobatic competitions, with the excellent German pilot Gerhard Fieseler who was demonstrating inverted looping. <br /><br />So, the French carburetors used in aerobatics engines were adjusted for inverted flight.<br /><br />It's difficult to believe that the French combat engines were not using such carburetors.<br /><br />Question #4: The EGT was known since 1934-1935 in the transport companies. <br /><br />But I do not know if such a device was fitted on D 520. Sorry...<br /><br /><br /><br />Drixhttps://www.blogger.com/profile/13286966270077187785noreply@blogger.comtag:blogger.com,1999:blog-2234859350538626498.post-31381902207804126942016-11-24T01:52:12.846-08:002016-11-24T01:52:12.846-08:00Good day and thanks for this precise article.
If ...Good day and thanks for this precise article.<br /><br />If I'm not going off thread, I would like to ask a few details that could help me to better understand operational behaviour and capabilities of this fighter.<br /><br />1.Could the flaps be set at any angle between "raised" and "landing" position, so to get also an help in combat and for takeoff?<br />2.Did have its engine (Hispano-Suiza 12Y45) problems with negative G's?<br />3.Was its Ratier propeller automatic (I mean, in same fashion of the Bf 109)?<br />4.Was its mixture variable in flight, so to lean it to reduce consumption?<br /><br />Thanks for any help!<br />Anonymousnoreply@blogger.com