Fox .15 slant plug  
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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Tachometer Readings >> Fox .15 slant plug
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Fox .15 slant plug - 7/4/2007 4:02:52 PM   
buzzard bait


 

Posts: 1025
Joined: 1/1/2003
From: Ithaca, NY, USA
Status: offline 		Fox .15, slant plug, MKX carb (circa 1980)

10% nitro (Omega with extra castor added), McCoy 59 plug

Master Airscrew Scimitar 8x4 = 12,300 rpm

This engine was designed for 25% nitro, so there is probably more power available with the right fuel. Needed a hot plug to start and run well on 10%.

Jim
       Post #: 1

RE: Fox .15 slant plug - 5/3/2008 7:04:06 PM   
jeffie8696



Posts: 1272
Joined: 5/10/2007
From: coralville, IA, USA
Status: offline 		Fox 15 slant plug . 15%nitro 20% castor Sig fuel, 8X4 Master Airscrew , OS A3 plug. 15,500 rpm.This is the transition model with the better carb adapted by the factory to the C/L engine. I have 3 of these and they all run like this. Problem is getting a muffler.

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_____________________________

Castor, its like Vitamin C for glow engines. I am not Dom from Airwolf but I do resemble him.......Unfortunately

(in reply to buzzard bait)
       Post #: 2

RE: Fox .15 slant plug - 5/4/2008 2:09:40 PM   
buzzard bait


 

Posts: 1025
Joined: 1/1/2003
From: Ithaca, NY, USA
Status: offline 		Mine has the last carb they sold with it - MKX, I think? It is identical to the carb on my Schneurele ported .15BB. I think the lackluster performance is due to the head shim still being in place. With the figures you got it must have about the highest power/weight ratio available in such a small engine.

I have the stock muffler and this engine is the most deafening little cuss I've ever owned (well, my Cox .15 TD might have beaten it, but that was a long time ago). It's not just a simple expansion chamber either - it has two concentric chambers with perforated holes between them. I haven't dared to try it without the muffler, so maybe it actually does something, and it would be even worse without it. I am really spoiled by OS mufflers, and for that reason alone I haven't decided if I'll use this on a plane. Jim

(in reply to jeffie8696)
       Post #: 3

RE: Fox .15 slant plug - 5/4/2008 9:24:02 PM   
jeffie8696



Posts: 1272
Joined: 5/10/2007
From: coralville, IA, USA
Status: offline 		Oh I Will get a muffler on this thing yet and use it. It is way too powerful to let languish.

_____________________________

Castor, its like Vitamin C for glow engines. I am not Dom from Airwolf but I do resemble him.......Unfortunately

(in reply to buzzard bait)
       Post #: 4

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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> Tachometer Readings >> Fox .15 slant plug
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