jlingrel

I bought an OS 32F oin eBay and a new MACS tuned pipe, but it came with no directions. Anyone have some idea as to how to tune a pipe. have never tried it in the past.

John

piper_chuck

My Feedback: (12)

Here's a good description: http://www.macspro.com/tuning.asp

jlingrel

That is good. I will try what they show there. Should make for an interesting Shrike 10

John

piper_chuck

My Feedback: (12)

I suggest rigging up a test stand to get the pipe length right. I also think a .32 is too big for a Shrike 10, but it's your plane.

Ernie Misner

I have an OS 32 on an Uproar. Most guys would put a 46 on the Uproar, but that OS 32 with a black Mac's one piece muffler gives that plane unlimited vertical. It is hard to believe how that little 32 can put out!

Ernie

DarZeelon

Ernie,


The black OnePiece mufflers by Macs are not even claimed to add power to any engine.

Their only real advantage is light weight (which is a replacement for power...), but it is offset by the very unreasonable price they are sold at.
If you remove the baffle from the original muffler, you will get a free demonstration of the RPM this engine is capable of.

Adding a real tuned muffler (like those from MVVS) will really boost the performance, but you will need some kind of adapter.


The Uproar is a light enough aircraft for even this small engine, to pull up vertically.

jlingrel

While I was living in Egypt, the Egyptians (they are crazy) were flying Sig Wonders with the OS 32. It should work very well on the 10 Shrike

John