Remi,
A few years ago I measured the speed difference "before and after" for my
monowheel
speed kit over a range of speeds from 90 to 135 kts. The lower speed gain
was only about 5 kts but, understandably because drag increases at speed
squared,
the top of the speed range had an 8 kt gain. Overall, the average gain
over this speed range was 6.5kts.
It's a worthwhile improvement in speed especially if you cruise at 120kts+ but
I can't help thinking that the design of the fairings could be improved. All
of the flap bracket fairings have a very broad trailing edge and the curved,
open tops at the back must induce drag as the air curls over into it.
Regards
Roger Mills
G-BVUV
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