I am building a "Ruffy" which will be powered by a Fox 35 w/hemi head and stuffer plate. Any suggestions for a prop choice would be appreciated. I will be using a uniflow tank and ST type needle valve assembly.

my fox with the same add ons  really likes the APC 10 X 5.  the RSM 10 X 6 is also a good one as is the Rev-Up 10 X 6W .

  Bigiron

My Fox is like yours except that I took the hemihead off because it was too powerful.  I'm running a Taipan 11 x 5.  People say the APC 10.5 x 4.5 is a good prop for the Fox 35.  It's a matter of fly and try.

The RSM 10X6 is outstanding on both Fox 35 and OS Max S 35 engines.  It's pitch measures a little less than 6, so it is more like a 10X5.5.  It is also light and pretty well balanced as it comes of of the package.
Steve

I agree, I have been using one on my Fox 35 with hemi head and stuffer back[late on my Arctic fox and it really works good.Also the old BYan O's work very well.

Brett, are we talking wood or nylon props?

I sometimes wonder about this "flying apart" of nylon props (yellow ones and TF red and white)...I have heard about.. read about it... have used them a lot in the beginning of my modeling career.. but I have never seen one come apart when used on a stunt engine..

Wood is a good way to go as Bret stated about flexibility.. I have used the black thin bladed Master Airscrews on my OS 35s with great results.. I like them because they balance easy.. and they are cheap and come in a wide array of sizes that my local HS seem to carry... a great RC prop..

Sometimes when a Fox is "working too hard".. I switch from a TF 10x6 to a 10x5, these are the round blade ones... my favorite... I have a nice supply of them. I find the BY&O 10x6 can be too much and use a 10x5 unless you up the nitro.. 10% nitro with 25% castor... is a good compromise... a little more oil if it is 80 degrees or above.