Originally Posted by Larry3215
If your using A123 cells, then a 13" prop is probably safe for a first test but it will likely still be pushing that motor. Be prepared to prop down.
Those are not the most efficient motors so I would stay on the lower end of the power range Dr kiwi suggested above and use throttle management.
Yeah, I'll do some static testing of course and try to keep an eye on things. I don't fly a plane like this very hard. Just cruise it around with some basic aerobatics thrown in. I'll only be full throttle for short vertical up-lines. I suspect a 12x6 or a 12x8 might be the ticket.
I had a Somethin' Extra converted to electric a couple years ago with an AXI 4120 and CC Phoenix 60. I was flying it on a 4S1P 4000mAh Li-PO with a APC 13x6.5E. It performed really well. It was a beautiful, kit-built SE that I wish I'd have held on to. I sold it at a fun fly and the guy crashed it that night
I have this setup hanging on the wall and have an opportunity to acquire another SE so I thought I'd give it a try.
I fly with a Hitec Aurora and have a full sensor station on order that will allow me track RPM, motor & ESC temps and current while in flight. I ordered it for another, much larger project (B.USA 1/4-scale FOKKER D.VIII). However, I might slip the sensor station in the Somethin' Extra for some test flights to get everything worked out.