RE: New prop for H9 40 Alpha
To replace the spinner use #EVO040219 to replace the weighted prop driver then any spinner will work. Also I have found that the APC 10x7 is the best all around prop to use. Keep in mind that ths will increase top speed. To retune the engine file the stops off, this gives you full range of the needles. Loosen the set screw on the low speed needle and reset the the needle then tighten the set screw back so you can still use the lever for a fine setting. The plane plane top end will increase about 20mph. Dennis