109 e4 performance

[Robo.]

Originally Posted by Kwiatek

Regarding V15a performance in these test it didnt have variable-speed hydraulic supercharger control and of course it was a prototype plane ( in most cases prototypes reach better performacne then serial production planes)

Nice job Kwiatek, just to remind you that the V15a was identical to series E-1 and it has had some problems to reach the guaranteed power output and the difference in PS had to be calculated, hence the staggered line. In this case the prototype certainly performed worse... As for the supercharger, that's just as you wrote, the V15a had the same supercharger also, but the test was commited without it on purpose (as per the test description).

Originally Posted by Kwiatek

Swiss 109 E-3 reached 464 km/h with original prop and from German test we got 467 km/h.

The French test was very accurate as for the top speed, also in the same ballpark. That's for the E-3 with 601A and 9-11081A, at 1.3 ata, 0m. What was the rad setting? Also 1/4 open?