Most Overrated aircraft of WWII.....?

The most over-rated aircraft of WW2


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If two stages were a setting, two stages plus two speeds would equal four settings. Unless there was some way to flip the second stage off, you have two settings.


For the 2-stage superchaged versions of the R-2800 and R-1830 as used during the ww2:
Engine-stage supercharger was always turning if the crankshaft was turning - IOW, single speed only for that stage. The auxiliary stage was de-clutched in low altitude, thus it used no engine power to turn; all supercharging was done by engine-stage S/C.
Above ~5000 ft, the aux S/C was clutched in, using the 1st set of gears (1st speed). Incoming air was 1st compressed by aux stage, than by engine-stage - ie. 2-stage supercharging. Above ~20000 ft, the aux S/C was shifted into second gear (2ns speed now), again 2 stages of supercharging.

So we have a combination of 1 stage being just with 1 speed gearing, and 2nd stage being with 2 speed gearing + neutral setting. What we can make from the 'apples + oranges' equation?
 

So we have a combination of 1 stage being just with 1 speed gearing, and 2nd stage being with 2 speed gearing + neutral setting. What we can make from the 'apples + oranges' equation?
Thanks Tomo! I was halfway through this very explanation, but you beat me to it and said it more clearly than I would have.
I never cease to marvel at how much confusion reigns about radial engine supercharging. Imprecise terminology and overly complicated explanations combine with preconceived notions to lead to faulty understanding. I never really understood it myself until we took an 1820 apart, reassembled it and ran it in mech school.
 
I remember a statistic: the casualty rate for strategic bombing by the 8th AF and its British equivalent was not only higher than the ground forces engaged in combat, but greater than the Japanese kamikaze squadrons.

If I remember correctly, the 8th's pilots had to get 25 good missions under their belts....

The Special Attack groups, not so much....
 
The P-39D was a 1942 airplane so it should be compared with the A6M2 which was in service at the same time. P-39D would not outclimb the A6M2 but would climb at about the same rate at combat power (3000rpm). P-39D was significantly faster at all altitudes, 368mph at 15000' vs 316mph for the A6M2 from the official IJN tests. The captured Zero would reportedly do 330-335mph in US Navy tests, still slower than the P-39D.

1942 P-39s biggest problem was performance with the ever present drop tank. The tank made climbing above about 18000' difficult as that was it's combat ceiling (1000fpm). Cruising at below 18000' meant the A6M2 would almost always be above. Later 1942 P-39L was lightened by 650lbs in an AAF test in September at Guadalcanal and would operate at 27000'. But then in a couple of months the P-38F/G would be in theater.
 

Agree, Swampyankee. As the saying goes, nothing is totally useless, some things can be used as a bad example.
 

OK, just a point--What the guy is saying is that the Spit pilots have to ry and dedstroy the bombers, '109s & such are just a very nasty nusence. Thr '109s, on the other hand, need only concentrate on the RAF fighters so the only time Spits engage DLW fighters is when defending against a German attack--and historically, the guy who attacks is at a serious advantage. I've seen estimates that, at least through Korea, most fighters that were lost had pilots who didn't even realize that they were in the enemy;s Revi....

PGF
 

But destroy all the airfields close enough to the Chanel, now he has to send bombers without escorts--and BoB pretty much proved that the '110 was useless as such--and it's 17 September but way earlier....

Or hit Dresden, now the DLW has to pull back a lot of those fighters from Abbeville....
 
No it doesnt, Me110s were perfectly capable of mauling any unescorted bomber even heavily defended ones like the B-17. The British had given up daylight raids on Germany before the BoB started.
 

Ah....Ma Deuce?
 
No it doesnt, Me110s were perfectly capable of mauling any unescorted bomber even heavily defended ones like the B-17. The British had given up daylight raids on Germany before the BoB started.
But if the RAF still has Hurries, and maybe even a few Spits--for Eleven Group....
 

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