gun synchronization to fire through propeller arc

[Harri Pihl]

Originally Posted by Harri Pihl

I have seen more detailed results (which contained hitting probabilities) posted by Mr. Hopp somewhere but can't find these right now.

Mr. Hopp kindly sent me a copy of the report. It's a calculated comparison of the MK103 and MK108 and quite large, 12 pages. As an example following hit percents are listed against the B-17 at range of 400m and angles of 0, 15 and 60 degrees:

MK103
0deg 36,6%
15deg 22,8%
60deg 7,5%

MK108
0deg 36,4%
15deg 12,7%
60deg 3,0%

So in the calculation the velocity has signifiqant impact on hitting probability particularly in the case of large deflection. However, the MK108 battery was found to be superior due higher rate of fire, lower weight and more compact size. Obiviously these hitting percents appear to be rather high given that in practice pilots tended get much worse hitting percents, I have seen values below 5% quoted.