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29 July 2018, 01:10 AM
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#1 |
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Forum Ace of Aces
Join Date: Feb 2000
Location: Germany
Posts: 4,654
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Purpose of channeled metal plates…
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Have a look at the following photos: http://www.theaerodrome.com/forum/pi...pictureid=1847 and https://imgur.com/a/iFHmEdx What was the purpose of these long curved plates? It seems that they were sometimes removed from the Fokker D.VII and this might mean that these devices were not really necessary.  For me there are two possibilities: keeping away the blast of both guns from the valves (maybe causing lubrication problems?) and/or channeling bullets away from the upper part of the engine (the latter sounds a bit strange and in this case both plates would have had a considerable weight due to the needed thickness/stability). Further photos of these metal plates (or the lack of them) can be found here (the different Fokker D.VII kits, archive photos): http://www.wingnutwings.com/ww/  Who has an answer?  .
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Best regards from Germany Volker Nemsch  "My words came out fine. The problem is that they were incorrectly processed by your brain." (???) "Much to learn, you still have." (Yoda) "I never said all that shit!" (Confucius) |
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29 July 2018, 04:08 PM
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#2 |
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Rest in Peace
Join Date: Jan 2010
Location: Moruya,NSW. AUSTRALIA
Posts: 2,646
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My "guess" Volker would be to keep the heat of the muzzle blast off the exposed rockers & valve springs.
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Regards Barry H. Its a fine line indeed between going out in a Blaze of Glory or having Crashed & Burnt! Member of The Australian Society of World War Aero Historians Inc. |
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30 July 2018, 04:36 AM
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#3 |
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Forum Ace of Aces
Join Date: Oct 2004
Location: Cheltenham
Posts: 3,438
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Barry is correct; blast deflectors. Last thing you need is bits of expended powder/grit on the valves. They are folded from steel into sort of an inverted 'W', with a flat between the Vs, not curved.
Regards John
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Vintage Aviation Team Hangar 005, CNC3, Caledon Ontario Facebook.com/VintageAviationTeam |
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30 July 2018, 05:00 AM
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#4 |
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Forum Ace of Aces
Join Date: Feb 2000
Location: Germany
Posts: 4,654
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Thank you for...
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... for your answers. I always thought it more probable, that the blast was more a problem than a bullet. But now I know it. "...not curved ..." The term "curved" was caused by my lack of corret British technical terms. I just wanted to express that this sheet of metal was "not flat"...  .
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Best regards from Germany Volker Nemsch "My words came out fine. The problem is that they were incorrectly processed by your brain." (???) "Much to learn, you still have." (Yoda) "I never said all that shit!" (Confucius) |
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30 July 2018, 08:07 AM
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#5 |
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Forum Ace of Aces
Join Date: Oct 2008
Posts: 4,831
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Here is a good view of the section of the Blast Protectors .
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. J M ,.....Not young enough to know everything ! |
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30 July 2018, 11:07 AM
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#6 |
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Forum Ace of Aces
Join Date: Oct 2008
Posts: 4,831
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Stutze fur Flugzeugzerstorer
I notice this machine also , is fitted with the support for the device .
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. J M ,.....Not young enough to know everything ! |
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30 July 2018, 01:53 PM
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#7 |
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Forum Ace of Aces
Join Date: Oct 2004
Location: Cheltenham
Posts: 3,438
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..and rectangular ejection chutes. Nice find, John.
Volker, your English is much better than my German. Regards, John
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Vintage Aviation Team Hangar 005, CNC3, Caledon Ontario Facebook.com/VintageAviationTeam |
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31 July 2018, 09:46 AM
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#8 |
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Forum Ace of Aces
Join Date: Feb 2000
Location: Germany
Posts: 4,654
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Wow...
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... another picture of this little known device for holding the "Flugzeugzerstörer"!  Sometimes you get answers to much, much older questions here. .
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Best regards from Germany Volker Nemsch "My words came out fine. The problem is that they were incorrectly processed by your brain." (???) "Much to learn, you still have." (Yoda) "I never said all that shit!" (Confucius) Last edited by Volker_Nemsch; 31 July 2018 at 10:01 AM. |
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31 July 2018, 03:44 PM
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#9 |
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Forum Ace
Join Date: Feb 2005
Posts: 810
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I think that the role of these blast troughs is not so much concerned with the grit and dirt that might be emitted by the guns themselves but even more the grimy grease and oil on the engine that the muzzle blast of the guns would dislodge and blow into the valve train, including the camshafts and rockers. Another great argument for valve covers! Ransom
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31 July 2018, 03:51 PM
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#10 |
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Forum Ace
Join Date: Feb 2014
Location: Owen Sound Ontario Canada
Posts: 2,175
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Perhaps they might also prevent the muzzle blast from igniting any oil/grease on the engine?
Tony
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