ORIGINAL: rsmith0525
Hey guys, I maiden my SD 50 os55. I wasn't satisfied with the speed. Used a 13 x 8 then 12 x 8 prop, things looked a little more promising but my satisfaction level hasn't been peeked. The engine has only had 8 tanks put through it so I'm still in the breaking in mode. Thinking about putting a larger engine in her and using the os55 in the viper 500 when it gets off backorder. Any ideas for the SD for me?
WAY too much prop......... it is a 55 not a 75 !!
Just the 13" disk area out there is like having a big anchor on it.
9x8, 10x7, 10x8, 11x6 the largest
You want the engine turning over 13,000 at ground peak rpm. Preferable over 14,000 - up to 14,500 rpm
Bolt a 10x7 on it and give it a shot. It will not be rocket fast, but it will be a LOT faster than what you saw with a 12x8.