Compression and prop size?

**RknRusty** Sat Mar 10, 2012 4:40 am

I'm new to high compression on Bees. Do any of you folks adjust compression when you change props? I'll be using different sized props on the Li'l Satan/Black Widow. I'm running pretty high compression right now and did all the test runs with a 5x3 prop. But when I feel like doing some aerobatics without such a white knuckle factor, I use a 6x3. I wondered if more or less compression might be better with that much difference in size. Any rule of thumb like you use for nitro content?

microflitedude Sat Mar 10, 2012 5:33 am

One shim for every 10% percent of nitro. 24% = 2 shims.

Mark Boesen Sat Mar 10, 2012 6:00 am

microflitedude wrote:One shim for every 10% percent of nitro. 24% = 2 shims.

That's probably more true for a standard head then a hicomp head, I'd think it might be hard to needle a 1702 on 20% with two gaskets, usally a larger prop you'd want less compression.

**RknRusty** Sat Mar 10, 2012 6:12 am

microflitedude wrote:One shim for every 10% percent of nitro. 24% = 2 shims.

Yeah, that much I know, with regular heads.

Mark Boesen wrote:...usally a larger prop you'd want less compression.

Thanks Mark, I'll keep that in mind when I try out my setup this Weekend.

Mark Boesen Sat Mar 10, 2012 6:24 am

yep, its pretty cool when you see a big improvement in performance!

Surfer_kris Sun Mar 11, 2012 3:29 pm

RknRusty wrote:Do any of you folks adjust compression when you change props?

Lower compression for larger props, a shim or two is all it takes, unless you go into texaco mode.

Sponsored content

Compression and prop size?

Compression and prop size?

Re: Compression and prop size?

Re: Compression and prop size?

Re: Compression and prop size?

Re: Compression and prop size?

Re: Compression and prop size?

Re: Compression and prop size?