Paul Eastham
Well Known Member
Hi,
I am curious what you all are getting for your 75% cruise speed. I'm coming up a few knots short of the book value, though I have not spent much time debugging it yet. I'm hoping some tweaking of my heavy wing and/or leg fairings will resolve it.
Don't forget to post your equipment installed with your speed.
My airplane: RV-9A, O-320, one lightspeed ignition. Van's recommended sensenich prop, nothing else fancy, and all fairings installed including intersections.
At 75%, I get about 156 KTAS / 180 mph. That's at 8000 DA, 2530 RPM, 22.1 MAP. 9.5-10 GPH.
Van's publishes 75% cruise at solo weight as: 187 mph = 162.5 knots
I am curious what you all are getting for your 75% cruise speed. I'm coming up a few knots short of the book value, though I have not spent much time debugging it yet. I'm hoping some tweaking of my heavy wing and/or leg fairings will resolve it.
Don't forget to post your equipment installed with your speed.
My airplane: RV-9A, O-320, one lightspeed ignition. Van's recommended sensenich prop, nothing else fancy, and all fairings installed including intersections.
At 75%, I get about 156 KTAS / 180 mph. That's at 8000 DA, 2530 RPM, 22.1 MAP. 9.5-10 GPH.
Van's publishes 75% cruise at solo weight as: 187 mph = 162.5 knots