I flew a 180 HP CS prop RV-7a the other day and it seemed 20 knots slower than I expected.. what should be causing it? IO-360, 180 HP, Whirlwind 2-Blade CS prop, electronic ignition, wheel pants and full fairings throughout..
7500 feet, 8500feet and 9500 feet. WOT played with RPM from 2300, 2400, 2500 and 2600. Leaned to 80 ROP, only saw 152 to 155 knots TAS. Even in the descent, it felt like it wasn’t as slippery as my -4.. it felt like it was dragging a parachute going downhill.. I don’t see any obvious signs of drag.. although the folded trailing edges are way under bent, could that be it?
7500 feet, 8500feet and 9500 feet. WOT played with RPM from 2300, 2400, 2500 and 2600. Leaned to 80 ROP, only saw 152 to 155 knots TAS. Even in the descent, it felt like it wasn’t as slippery as my -4.. it felt like it was dragging a parachute going downhill.. I don’t see any obvious signs of drag.. although the folded trailing edges are way under bent, could that be it?