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FOX 50 runs HOT

Old 02-25-2006, 07:22 PM
  #101  
freelen
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Default RE: FOX 50 runs HOT

Its obvious that you were smarter than the instructions......I have been using Fox engines since about 1958 or 59 and have a bunch of them. never seen a Fox that wouldnt run if ya just followed Dukes instructions....set the low speed needle FIRST, then dial in the high speed and go fly.....:-)
Old 02-26-2006, 09:03 AM
  #102  
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Default RE: FOX 50 runs HOT

"mixture setting has no effect on how hot it runs"


And here is the problem.

A change in mixture should always have an effect on how the engine runs. If not, you have a problem, such as a clogged spray bar, occluded/leaking fuel inlet, defective fuel tank installation, leaking fuel line. Get this fixed and there is an excellent chance that the overheating problem will be alleviated.
Old 02-26-2006, 12:30 PM
  #103  
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Default RE: FOX 50 runs HOT

I have run a few FOX engines and I will place my money that the overheating is due to bad bearings. Replace these and the engine will purr!
Old 02-28-2006, 04:36 PM
  #104  
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Default RE: FOX 50 runs HOT

Woody, I ran the Fox .74 today with the AJC head button and the Fox carb,

Fuel----Fox 5% nitro fuel /20% castor
Prop APC 12x8
Plug, standard Fox idlebar
Peaked after 15 additional minutes at 5,000 rpm rich or 1 hour total=10,370 rpm
Peaked after 45 more minutes at 6,000 rpm=10,830 rpm.
Muffler--as pictured in post above.
Old 03-05-2006, 09:21 PM
  #105  
jessiej
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Default RE: FOX 50 runs HOT

I ran my new Fox .74 for the first time today. EZ carb, stock head button & muffler. 5% nitro, 20% oil, Fox idle bar as supplied. VERY user friendly. Nice idle and transition from the first with no adjustments at all, though I expect I will lean out the idle a bit after the engine has a bit more time on it.

jess
Old 03-15-2006, 01:59 PM
  #106  
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Default RE: FOX 50 runs HOT

Woody, I transferred the AJC button to my old Fox .74 ABC, this engine was a real pain when I got it, its been converted to Diesel for several years. With the AJC head button it runs like a clock and even with a 7mm MVVS carb and the Fox quiet muffler it still managed to turn the APC 12x8 at 10,775 on 5% nitro. Now it will be converted back to Diesel and put back on my Tiger 60.
Old 03-15-2006, 08:09 PM
  #107  
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Default RE: FOX 50 runs HOT

Hey Torque...

From deep within the secret underground Race labs....Here's my latest evil creation for the old trusty Fox .40...

Very slightly lighter (believe it or not) than the stock muffler, dead quiet and about 1000rpm stronger.





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Old 03-15-2006, 09:32 PM
  #108  
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Default RE: FOX 50 runs HOT

Race, how did you anchor the outlet pipe, iy's acool looking muffler.
Old 03-15-2006, 10:02 PM
  #109  
RaceCity
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Default RE: FOX 50 runs HOT

It's friction fit with a JB fillet. The "stinger" is a 3" piece of KS thin walled aluminum tubing inserted 1.5" into the can. There's no magic in those numbers...I'm just guessing my way along.

The can itself is secured to the front half of the Fox muffler with the original screws, and sealed with JB. (the slow cure kind). The pressure tap remains in the original location. The cantilevered weight of the mousse can "shouldn't" be a problem. Those cans are incredibly light. I have a plan "B" should the assembly prove itself insufficient.

Only static tests so far...the real proof is in the air, but all looks good so far. The model didn't really need any more power, but the noise reduction? My word....this thing is amazingly quiet. That was the shocker.

Kinda pricey though....$1.00+ tax for the can at Just-A-Buck. (Great fun to ask the kid at the counter "how much for two?") The other doo-dads were extricated from my Box-O-Stuff.

....To Be Continued.
Old 03-16-2006, 09:43 AM
  #110  
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Default RE: FOX 50 runs HOT

What the heck did you make that from? A fire extinguisher?
Old 03-16-2006, 01:17 PM
  #111  
RaceCity
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Default RE: FOX 50 runs HOT

White rain can...6oz size.

Weight? Nada. Probably less metal in that can than there is in the rear half of the fox muffler, and we all know that's not much.

Old 03-16-2006, 01:44 PM
  #112  
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Default RE: FOX 50 runs HOT

I recall I tried to take the rear part off one time, and it wouldn't come loose after taking the screws and pressure nipple off. Does it need heat to take it off?
Old 03-16-2006, 01:54 PM
  #113  
RaceCity
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Default RE: FOX 50 runs HOT

I needed to use a little "thermal persuasion" on mine. Give it a minute or so with the Monokote heat gun and wearing a heavy glove, just sort of "rock" the rear portion of the muffler a little at a time...it'll eventually come loose.
Old 03-16-2006, 02:26 PM
  #114  
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Default RE: FOX 50 runs HOT

OK, I was just taking stuff apart to see how it all goes together. Didn't want to break something out of courosity so I just put the screws back in.
Old 03-20-2006, 03:49 PM
  #115  
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Default RE: FOX 50 runs HOT

One of our Fox haters came to the field one day while I was flying a Q-500. His comment, "I don't believe it, Tony's got himself a Webra!"
I landed, taxied back to the pits, shut down, and coyly made sure he saw that I was using a Fox 40 Delux.
Old 03-20-2006, 06:41 PM
  #116  
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Default RE: FOX 50 runs HOT

heh heh....there ya go Tony.

Give 'em a nice blast of castor exhaust and then just smile...

Love it.
Old 05-26-2021, 08:46 AM
  #117  
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15 years later, anyone alive and using Fox anymore now that the company disappeared, or are these just closet stuffers now?
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Old 12-20-2021, 07:14 PM
  #118  
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Boy, been a while since I've been on this site. And yes, at 77, about half my glow powered planes ae still using Fox. They ALSO MAKE UP nearly half my collection. BTW, I ALSO have, and use, a number of O. K. Cub engines. Even a couple Wen-Macs.
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Old 12-24-2021, 04:33 AM
  #119  
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Originally Posted by J330 View Post
15 years later, anyone alive and using Fox anymore now that the company disappeared, or are these just closet stuffers now?
I got rid of all of my Fox junk. I didn’t have much luck with them. Happier with Enya, ST, Jett, Novarossi, etc.

edit: I take that back. I do still have 1 Fox left. It’s my piece of crap .50 that my buddy and I put an MDS .40 piston and liner into (with about 10 gallons of fuel through it). It never ran well with the Fox .50 piston/liner, but it actually runs pretty decent with the MDS parts in it.

Last edited by 1QwkSport2.5r; 12-24-2021 at 05:03 AM.

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