[martin417]

Originally Posted by travis

So, if a 12x3.8sf propeller is not the best candidate, what is a better one? Let’s make the design criteria D<=12” and a cim with 1:1 transmission. I had a hard time finding pitches below 3 in the 12” class, especially ones that didn’t run at the more like 15Krpm nitro speeds. Would an APC 12x10E thin electric be more my speed maybe? If there isn't a good option in the 12" range, I could maybe squeze into a size 14.

I have a working drive train, so the propellers are just gravy at this point. Even a modest 1/4lb thrust is justification enough for installation in my opinion.

Thanks,
Travis

Theoretically, a CIM should be able to swing that 12 x 3.8 prop at 8500 rpm, giving you 4 1/2 lb. thrust, and only using .35 HP. Sounds like a good candidate to me.