What can I expect for performance gains with the Constant Speed Propeller Conversion, and how does it change the weight and balance?
It is hard for us to give very exact performance figures because Super Cubs vary so tremendously and we definitely don’t want to mislead anyone. All we can do is provide how ours performed with the various propellers. We tested our Cub, which is 180 H.P., 29 in Tundra tires, and by no means built to go fast. With the McCauley pitched for “climb” performance, top speed was about 90-95 MPH. With a McCauley pitched for “cruise” performance it would max out at about 105 MPH. With our constant speed, the top end is now about 115 MPH. So we figure most Cubs should have about a 20% improvement in cruise speed if compared to a Borer “Climb” prop, and of course, something less if compared to a cruise prop. As far as the take-off performance goes, our prop will perform at least as well and probably better than even a “Climb” Borer prop. This is because the engine can produce its full rated power by going directly to 2700 RPM immediately upon throttle advancement. This is definitely a significant
