Thanks Hobbsy,
Then I just wander why Webra is telling on that www-page those figures for Power and RPM. Here is my way of thinking and
I wander what is wrong: - Using the Calculator of Pe and assuming APC propeller, and power aim 3bhp (out of 3.25) and
the RPM to be 13500 (out of 16000), and iteractively chaning the DxP of the propeller, in few iteractions I come to the
cases like those:
APC 13x7 @ 13500 gives 3.11 bhp, and speed of 144 km/h, thurst = 7.19kg,
APC 12.5 x 8 @ 13500 gives 3.00 bhp and speed 165 km/h, thurst = 6.84kg,
that is what I exactly would like to have, but it seems Webra is the wrong
engine for this speedy performance, is it so ?
BR,
Nick