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The G-10 might be the 'poor mans K-4' but its performance was more or less the same as the K-4.
...the figure of 480 NF's is hypothetical at best, as it is still unclear though having on hand what condition what were they in.
Del, the Soviets give better performance values for the La-7 than what can be read on your graf. The 'forsage' is available only in low compressor gear, so in both compressor gears the La-7 can beat the 670 km/h mark.
Keep also in mind, that the speed figures attained in these trials are not corrected for compressibility effects.
If it's not too much a problem for you, could you please point me to the tests (somewhere at the Internet , there La-7 pdf was being pointed out on in this forum not long ago). Gordon Khazanov give 612km/h at SL and 658 at 5900m (for 1944 production) and 613km/h at SL and 661 at 6000m (for 1945 production).
Hi Milosh,
Fixed trim tabs are not very user friendly and are mostly set at the factory.