Mufflers for McCoy

[Carl Cisneros]

does any one make a muffler for the McCoy 35?
also the Fox 36X motor as well.

thanks

[Andrew Tinsley]

Hello Carl,
Unfortunately the metallurgy of the McCoy is suspect, the extra heat build up due to the muffler will not do it any good.

Andrew

[rustler]

McCoy did make a flow-through muffler. Definitely fits the older McCoys and probably the red head stunts. Didn't offer much noise reduction, and probably not much heat retention.

[Balsa Butcher]

Back in the day Tatone Peace Pipes were popular. One OTS flier still here still uses them on his McCoys with good results. Available on E-Bay or someone here may have one that they can spare. 

[Avaiojet]

Here ya go, check this out!

http://stunthanger.com/smf/index.php/topic,35927.0.html

http://stunthanger.com/smf/index.php/topic,7960.0.html

[James C. Johnson]

I have run the Tatone Peace Pipe on the RH 35... a stock one makes the engine run hot about mid-flight and the engine begins to sag. I trimmed the end (opened it up) and Dremeled the insides ... I did this to a OS Jetstream muffler too... the engine runs a lot better but still will run hot if you run it on the lean side. The Jetsteam ran great on an OS35s .. IMO, the tongue mufflers work just fine.. another muffler I customized for the Fox 35 was the OS 702, the front where it mounts to the exhaust needs to be ground flat, then I make a gasket with thick gasket paper and Pematex it to the muffler. This prevents it from sliding around and the sound is wonderful and no overheating... the trick is to experiment. Definitely make the holes point down, last year, I started flying again after a long lay off... and I mounted my tongue muffler with the hole up (brain fart) ... my hand was being burn while adjusting the needle and had oil all over it...what a mess..

JJ

[Paul Smith]

I agree with the position that the McCoy is a low price low quality product.  If you have one that runs at all you are lucky.  A lot of McCoy buyers were not so lucky.  If it runs, leave it wide open and enjoy it while you can.

I the past I have tried to muffle engines that were made to run wide open with limited success.  Better to use an engine that was engineered for a muffler.

[Andrew Tinsley]

I agree with the low price low quality comment. But they are a surprisingly good DESIGN from the period. I have done a rebuild on more than one RH35 using decent materials (effectively a new engine but using a rebushed case). The resultant engines were very good indeed. Shows what they could have been like!
Before anyone berates me for wasting my time on such "junk". I enjoy doing offbeat things, and it was just an interesting experiment that worked well.

Andrew.

[Carl Cisneros]

The 35 Red Head I have is an excellent motor.
After choking cold, and flipping a few times to get the fuel up in to the jug,
all I do is hook up the glo-start flip it backwards and she is off and running.

The only thing I did was replace the phillips head screws for allen head screws.

running a 10-5 on 10% with about 25% 80-20 mix oil.