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#1
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more radial fans like fw190?
The fw190 had a relatively compact, streamlined housing
for its radial engine, apparently due to an extra fan at the cooling air intake. If this was so successful why hasn't it been done more often? I may have noticed that in more recent aerobatic models from east europe... |
#2
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#4
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"frank may" wrote in message om... I think the Sea Fury & some other tightly cowled Centaurus powered a/c used fans. Didn't the Constellation use fans too? I think the FW 190 installation was well studied. It was excellent. A few of the Typhoon/Tempest dervatives also used Germanic style radiators a'la FW190D series and also achieved a speed improvement. The 490mph XP72 which was a P47 derivative had a fan. http://www.warbirdsresourcegroup.org/URG/xp72.html (Stephen "FPilot" Bierce) wrote in message ... (jt) wrote: The fw190 had a relatively compact, streamlined housing for its radial engine, apparently due to an extra fan at the cooling air intake. If this was so successful why hasn't it been done more often? I may have noticed that in more recent aerobatic models from east europe... The Skyraider also had the extra cooling fans, IIRC. But most of the radial engine applications after the war were for transport planes (which could afford to have larger cowlings), cropdusters (which could go without cowls) and some helicopters (which had different cooling systems). Stephen "FPilot" Bierce/IPMS #35922 {Sig Quotes Removed on Request} |
#5
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Subject: more radial fans like fw190?
From: "The Enlightenment" Date: 8/19/2004 6:36 AM Pacific I think the FW 190 installation was well studied. It was excellent. A few of the Typhoon/Tempest dervatives also used Germanic style radiators a'la FW190D series and also achieved a speed improvement. The radial on the FW 190 was built on license from Pratt & Whitney. Arthur Kramer 344th BG 494th BS England, France, Belgium, Holland, Germany Visit my WW II B-26 website at: http://www.coastcomp.com/artkramer |
#6
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The radial on the FW 190 was built on license from Pratt & Whitney.
No. FW had built Pratt and Whitney engines under license in the earlier 1930s but BMW 139 and the latter BMW 801 used in the FW 190s were BMW's own designs, not licensed. Cross licensed were not that uncommon, though. Both sides used things lisenced from the other and after the war paid the licensed in full. Allies to Germany, as well as Germany to Britain and US. Though I'm not sure if Soviets ever paid for their licenses or copies... jok |
#7
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Subject: more radial fans like fw190?
From: "Jukka O. Kauppinen" Date: 8/19/2004 7:35 AM Pacific Standard Time Message-id: The radial on the FW 190 was built on license from Pratt & Whitney. No. FW had built Pratt and Whitney engines under license in the earlier 1930s but BMW 139 and the latter BMW 801 used in the FW 190s were BMW's own designs, not licensed. Own designs based on what they learned from the P&W license. Arthur Kramer 344th BG 494th BS England, France, Belgium, Holland, Germany Visit my WW II B-26 website at: http://www.coastcomp.com/artkramer |
#8
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ArtKramr wrote:
Subject: more radial fans like fw190? From: "Jukka O. Kauppinen" Date: 8/19/2004 7:35 AM Pacific Standard Time Message-id: The radial on the FW 190 was built on license from Pratt & Whitney. No. FW had built Pratt and Whitney engines under license in the earlier 1930s but BMW 139 and the latter BMW 801 used in the FW 190s were BMW's own designs, not licensed. Own designs based on what they learned from the P&W license. As was the US Space program - and most of the advanced aerodynamics - based on what you learned from Nazi Germany. Ken |
#9
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Subject: more radial fans like fw190?
From: Ken Duffey Date: 8/19/2004 7:57 AM Pacific Standard Time Message-id: ArtKramr wrote: Subject: more radial fans like fw190? From: "Jukka O. Kauppinen" Date: 8/19/2004 7:35 AM Pacific Standard Time Message-id: The radial on the FW 190 was built on license from Pratt & Whitney. No. FW had built Pratt and Whitney engines under license in the earlier 1930s but BMW 139 and the latter BMW 801 used in the FW 190s were BMW's own designs, not licensed. Own designs based on what they learned from the P&W license. As was the US Space program - and most of the advanced aerodynamics - based on what you learned from Nazi Germany. Ken Fine.Let's just keep everything honest. Arthur Kramer 344th BG 494th BS England, France, Belgium, Holland, Germany Visit my WW II B-26 website at: http://www.coastcomp.com/artkramer |
#10
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"ArtKramr" wrote in message ... Subject: more radial fans like fw190? From: "Jukka O. Kauppinen" Date: 8/19/2004 7:35 AM Pacific Standard Time Message-id: The radial on the FW 190 was built on license from Pratt & Whitney. No. FW had built Pratt and Whitney engines under license in the earlier 1930s but BMW 139 and the latter BMW 801 used in the FW 190s were BMW's own designs, not licensed. Own designs based on what they learned from the P&W license. The BMW801 was pure BMW Engineering however they no doubt did learn something from their earlier liscensed production of PW radials. I did think that the 139 was a PW derivative though I think through the Bramo company with which BMW united. The 801 had a innovations such as a multipoint direct in cylinder injection of the fuel and completely automatic control of mixture and boost. The pilot only had a throttle to opperate. It's installation in the 190 was excellent: the engine was tightly cowled to improve aerodynamics with airflow being provided by a geared fan opperating at about 3:1 to provide cooling. The exhausts were beautifully installed and provided an ejector effect to induce cooling and thrust. I believe that only one Soviet fighter is regarded to have achieved this level of perfection. Around the cowl was a circular oil tank that was armoured and thus protected the cylinder heads. It was thus a very tough battle damage resistent engine that provided the pilot with a massive piece of armour when going in head on against an american bombers 50s. The much loved US Gruman Bearcat for instance was inspired and the P47 was built specifically to deal with the 190. It's weakness was that its performance dropped of at altitude. The answer to this was the BMW801T which was turbo supercharged version. Focke-Wulf built some 190s with the turbo supercharger built into the belly as a bulge (unlike the P47 it wouldn't fit in the compact fueselage) but they did not persue the idea perhaps it was inelegant and the turbo metals were in short supply for such as massively produced aircraft. About 600 of these engines with a very neat intercooler installation ended up on the Ju388L high altitude reconaisence bomber where they were very neatly installed with the intercooler as 5 segments behind the engine. (The Ju388 also had a night fighter version built to deal with B29s attacking at night) (The Ju 388 seems to have had the same type of periscopic sighting system as used on the A26 invader only it had twin 13.1mm MG in a remote tail turret) However Fock-Wulf decided to install water cooled V12s into the Fw 190 to get high altitude performance. The 432 mph Fw 190D9 had a jumo 213A enigine but the Fw190D11 and Fw190D12 (only 70 entered service) had a Jumo 213E engine with the same two stage intercooler arrangement as the Merlin in the Mustang and could manage 460mph. Oddly for such an engine seems to have been heavily armoured for ground attack and torpedo bombing (they were used by the Soviets after the war for this) Apparently the annular radiators of the German V12s were quite battle damage tollerant as well as aerodynanic. The same type of engine jumo 213E with more performance ended up in the 475mph TA 152 H0 and TA 152H1 (H-1 had wet fuel tanks in its wooden wings for greater range) as this had very large wings it could not only fly extremely high it could out turn any Allied fighter. You can tell a Fw 190D9 from a Fw 190D11/D12/D13 by the latter lacking cowl guns and having an oval air intage instead of round and using a cannon firing through the propeller boss. One of these (The Fw 190 D13 I think) was to end up with a long barreled Mk 103 30mm cannon as a tank buster. It was this aircraft that I guess would have finaly replaced the Stuka. Arthur Kramer 344th BG 494th BS England, France, Belgium, Holland, Germany Visit my WW II B-26 website at: http://www.coastcomp.com/artkramer |
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