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General control line discussion => Open Forum => Topic started by: Sam Laughery on October 14, 2007, 06:54:20 PM
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I bought a Fox 35 and a Mcoy redhead NIB at a flea market a couple of years ago for $50. Not a bad deal. They both run great. I finally took my LA 25 off my Ringmaster and put the Fpx 35 with an APC 10X5 on it. It flies great just like I remember the Ringmaster back in the 50s. The only problem I had today was that the engine slowed down a little anytime I did an outside manuver. I have a feeling it may be the tank or tank placement. It is slightly higher than the center of the engine. Any suggestions? I also need to know where the CG is for the ringmaster and what the best fuel is for the Fox. Thanks for your help.
Sam
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Puting the tank on centerline is worth a try and as for balance, I think that the RM will do well balanced about 1 3/4 back .....and as for fuel, the Fox will give you excellent service on Fox Super fuel.......5% nitro, 29% castor oil, and the balance methanol....I would stay away from any synthetics myself...Regards, Phil
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The slowing of the Fox during outside maneuvers is common on profile type mountings. It can sometimes be a little disconcerting. Try moving the tank up some more and if it gets worse, go back down. move the tank about 1/16th inch at a time for these adjustments. Try different plugs and different props to see if that cures it.
I run Fox super fuel for both of the engines you listed.
Going up in nitro on the fox to 10% won't hurt it as long as you stay with high oil content--- STAY AWAY FROM SYNTHETICS on that engine.
Bigiron
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Sam,
Check your personal messages.
Joe
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I run several Fox 35's on profiles. I mount my tanks about 3/8" above the centerline of the engine. As for the CG, I couldn't really tell you. I've never checked it.
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You say it is slowing down, does that mean its rich or lean. If rich, then raise the tank alittle. If lean then you have to lower the tank. I have a profile with an Enya 35, Adimisin muffler that the tank is a good 1/2 inch below the center line. You also don't say if it runs the same upright as it does inverted. Somewhere on this site Bob Z. has a procedure for setting proflie mounted engines on the ground. Have fun, DOC Holliday
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H iSam,
The gurus have spoken! Marvin knows more about a Fox 35 than Duke did. y1 ;D
25%-29% castor oil for both engines, that's for sure. Adding an ounce or two (no more) of Klotz to a gallon of fuel is often recommended to help keep excess varnis build up from happening. I really like to add an ounce of Randy Smith's Aero-1 (Snake Oil! LOL!!) to my gallons of fuel.
One hint: don't let the McCoy ever get a real lean run...........