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If I know that the size of the 2 blades prop is 9 x 6, how do I convert that to a 3 blade size? Is it the same pitch but the blade length is only two thirds as long as one of the 2 blade's blade? I know the result is only a starting point but we have to start somewhere.
It's really a case of suck it and see .Experiment is my mantra for stuff like this.Just try it and see what the results are. You could ask the aero bods on say Aeromodeller or RCME ( Flying Models ) forums of a number of others.👍
get a watt meter they are cheap and you can read the current drawn at full revs ( although its not moving) this will give you an idea as to the run time of your battery and the capability of your ESC to handle the load. I think every one who uses electric motors and especially lipo batteries should have one!
"that's not a bug its just an undocumented creature."
Sir Terence David John "Terry" Pratchett, OBE (28 April 1948 - 12 March 2015)