Fox combat special

It's the MK 3, I'm thinking ae tryin' ae Tatone peacepipe.

Oh man, now you’ve gone and done it.

I’ll let Ken get into the particulars, but in short a Peacepipe on a fire breathing Fox combat is a bad idea.

Is a muffler required where you fly?

I've used a Peacepipe on other engines with not so favorable results. This was with mildly timed sport engines. The internal chamber and the outlet is considerably small. The MK III really doesn't want to run slow even with the venturi insert. I would feel that the Peacepipe would essentially hold back too much offering a extended lean run which would really be overheating. One other problem with the MK III is the stock head button design. The head chamber is totally flat with the hole for the plug only. What happens with this is that it tends to really force a lot of pressure directly into the plug area which takes the plug out in short order. Unless your engine has adequate head shims or someone has already changed the head design, if you combine the already known problem with a lean overly hot run, I can see this engine eating plugs on a regular frequency. One can only try and hope for the best.

Giggle....I stirred up ae hornet's nest....Here is the plan, I'm gaunnie turn a double bubble in the heid button (like K&B did on the DF engines) I'm also gaunnie raise the heid clearance tae .019. And I'm usin FAI fuel wi 25% sig castor. I cannae change the crank timing well, (I'm auld and shaky hands) Wish m' luck?

I ran the engine today wi the suction insert. What ae pussycat. I love this engine! it works on zero nitro well. I'm no gaunnie modify it. No need.

Cribbs74 wrote:
Is a muffler required where you fly?

A muffler doesnt have to be as restrictive as might be thought. As long as it is seen to be on the engine. "nah, its not that noisy, see ive even put a muffler on it" Lol. Wont defeat the noise meter types, but the odd person in the local park it can work with.

I shouldnt talk, I do have to muffle my engines properly in the local parks to stop exactly that above.

Good luck with your flight! I love that you have your engines running on FAI fuel. Its on my list of things to try with my own engines. even though its said they wont run or run very poorly (Cox 049) I want to give it a bit of a go.

Yabby

Hiya Yabby, I use zero nitro on all my engines even Cox. The Cox ones , I use one heid shim and get 17K on ae 5X3