Barry M14
Member
- Joined
- Aug 8, 2014
- Messages
- 89
- Location
- Hampden, Ma.
- Aircraft
- American Ranger AR1
- Total Flight Time
- 1,500 +
I had a WarpDrive in flight adjustable and I found it almost completely useless below 2500 feet. Rotax recommends all day cruise setting to be 35 inches of manifold pressure at 5500 RPM. If I set the prop for 5700 RPM on full power takeoff which is only 100 RPM less than the 5800 max that Rotax recommends (for a climb setting ) for under 5 min. At that setting I can just get about 33.8 Inches of manifold pressure at 5500RPM in straight and level flight. I have a 914 So as I go to 3-5 thousand feet and higher is when I would wish for the option of an in flight adjustable prop especially because of the 914 is still making full power at high altitude. I have found that since I switched to gyros that scenario happens very little now so I got rid of it
The next time I go over New York at 9,500 ft. I will look at my manifold pressure gauge and see how high it will go at 5500 RPM. I am guessing it will be around 32 Inches of manifold pressure.
I would think a 912 would benefit far less than a 914.
The next time I go over New York at 9,500 ft. I will look at my manifold pressure gauge and see how high it will go at 5500 RPM. I am guessing it will be around 32 Inches of manifold pressure.
I would think a 912 would benefit far less than a 914.