ORIGINAL: left seat
I am considering converting a Hanger 9 62 1/2 in wingspan Cessna over to electric. It currently has an OS 46 Ax in it. I don't like the mess of glow fuel so I am considering the conversion. I purchased a Turnigy L5055B brushless outrunner rated at 600kv. The plane will weigh about 7 1/2 lbs with the big 6s 22.5v lipo. Since the rpm will be, 22.5v x 600kv=13200rpm swinging a 12-8 and using a 70A ESC do you thing this is the correct set up or should I go to the smaller 18v lipo which would reduce the rpm 10800 and lighten up things about 1lb? Is my prop size and plane weight about right, what would you recommend?
It is a Cessna not a rocket!
With that prop the plane will have 10lbs of pull and will cruise flat out at 100mph... can you say FLUTTER!!!
Drop the prop to 11 inches for a 1:1 power to weight ratio and drop the pitch to about 5... e.g. an 11x5 or 11x4.5 E prop to increase your flight time and put the plane into the right speed range.
At worst use a 12x5 or 12x6 prop, but the plane will be speedy and you'll be sacrificing potential flight time for thrust...
You need NOT change anything else.
The same combo on a different plane could benefit from the 12x8 prop or even the 13x8, but not the Cessna.