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At 1941 I think it was a very closed match between the Merlin 45 and the DB 601E as best produced V-12 engine in numbers.
One out of this two engines...
At 1941 I think it was a very closed match between the Merlin 45 and the DB 601E as best produced V-12 engine in numbers.
One out of this two engines.
Edit.
The Allison lagged to much at altitude through it's single stage supercharger.
The Jumo 211 was too large and too heavy for it's performance output at this time.
The Allison lagged too much at altitude through it's single stage supercharger.
Jumo 211 F: 1340PS
lenght: 2172,5 mm
width: 804mm
height: 1053mm
Dry weight without intercooler 720kg
DB 601E: 1350PS
lenght: 1722mm
width: 739mm
height: 1027mm
Dry weight without intercooler 610kg
The Allison didn't have a low critical altitude. It was about the same as all other single-stage single-speed supercharged engines. The Allison was designed with a turbocharger as the high-altitude component and it was removed by the USAAF from the P-39 and P-40 due to lack of turbochargers for all planes. Theyw ere saved for the bombers and the P-38 only. Unfortunately for my love of the Allison, even WITH the turbocharger, it still had issues in 1941 that were corrected by early-to-mid-1943, but were not yet fixed in 1941.
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Don't buy it Wuzak.
5 - 6000 feet is not important when you have 15,000 - 20,000 foot ceiling and you need 25,000 - 35,000 feet. Neither one was sufficient for Europe and BOTH were OK for the PTO and MTO.
Don Berlin was allowed to build ONE turbocharged P-40 and it flew VERY well at 30,000+ feet. It was never adopted, but Don intended it to be a turbo unit after the first few ... but was never allowed to do so.
The XP-39 turbo unit WAS woeful, but the P-63 fixed all that and was a VERY good high altitude fighter that was about 12 mph slower than the P-51D at the P-51D's best altitude. At many other altitudes, the P-63 was faster, rolled better, climbed better, and turned better. Of course, it still had the abysmal Oldsmobile cannon ... and that was just plain awful, but was never the fault of the airframe.
Thanks. BTW, should we consider the DB601E as a 1350PS machine in 1941?
You only have four choices.
Allison
Merlin
DB 601
Jumo 211.
So I'd have to pick the DB 601 inverted V-12 by virtue of it's fuel injecttion rather than a carburetor. Of course, if picked, I'd mandate an elctric starter!
If you delete the electric starter, I'd pick the Merlin. Fuel inject the Merlin and I'd pick it first.