Author Topic: props (Read 625 times)

roger · « **on:** July 10, 2009, 01:52:54 PM »

what is a good prop size for a .15 motor and what about wood props? im running a os. .15 motor. and what about the grey props the ones that look old timey?

john e. holliday · « **Reply #1 on:** July 11, 2009, 09:23:22 AM »

Start with 7-6. Then try an 8-5 or 4. A lot depends on the airplane design also. DOC Holliday

roger · « **Reply #2 on:** July 11, 2009, 09:49:10 AM »

thank you

Paul Smith · « **Reply #3 on:** July 11, 2009, 01:31:20 PM »

I would rule out wood, since you want flywheel action to keep the engine running. Heavy is good, at least for the prop.

You need a size prop that lets the engine get to it's rated HP RPM. With a 70 MPH speed limit, you don't need a lot of pitch.

bfrog · « **Reply #4 on:** July 11, 2009, 06:55:19 PM »

In 15 carrier I use an APC 7X4 on my Cox Conqest engine. I have tried other sizes and that seems to work the best. The Cox spins up really well so I can't say this prop is the best for other engines but it works for me.

Author Topic: props (Read 625 times)

roger

props

john e. holliday

Re: props

roger

Re: props

Paul Smith

Re: props

bfrog

Re: props