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Engin ID Help w/ pics (1 Fox / 1 McCoy)

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Engin ID Help w/ pics (1 Fox / 1 McCoy)

Old 06-28-2013, 05:40 AM
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Default Engin ID Help w/ pics (1 Fox / 1 McCoy)

Hi all. I'm not an enthusiast, but I've been asked to sell some old RCairplane items for a family estate.

I'd like to have as much information as possible and any assistance would be greatly appreciated.

Engine #1 - McCoy Redhead 29: I'd like to know the year (based on the other items on the box it was in, I think early 60's?




Engine #2 - Fox: It's in a Fox 35 box, but every image I've seen of a fox 35 has the "35" under the "Fox". Any clues?


Thank you for your time!!

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Old 06-28-2013, 06:57 AM
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Default RE: Engin ID Help w/ pics (1 Fox / 1 McCoy)

1965 ish. for Fox and 56-66 for the McCoy
Old 06-28-2013, 07:29 AM
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Default RE: Engin ID Help w/ pics (1 Fox / 1 McCoy)

If the Fox box is original to the engine, then it's a "Rocket", not a "Stunt". I don't know very much about old Foxen, but if I recall what I've read on various forums correctly the Rocket series were low-priced, cheaply made versions, made to run fast (rather than for Stunt use).

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Old 06-28-2013, 09:27 AM
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Default RE: Engin ID Help w/ pics (1 Fox / 1 McCoy)

My Fox 35, bought in 1954, has a three bolt backplate, the exhaust is on the other side, and it does not have provision for a second needle valve, or for a muffler. I have the engine and the box somewhere. I flew stunt and combat with it.
Old 06-28-2013, 10:32 AM
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Default RE: Engin ID Help w/ pics (1 Fox / 1 McCoy)



Your particular Fox Rocket .35 was first made in 1962. It had a plain head not painted red, a larger intake venturi with a insert. The lateral mounting hole spacing was increased from 1.5 inches to 1 and 5/8 inches. Fox stopped putting the "Rocket" name on the engine bypass side.
Fox made and sold the engines for several years.
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Old 06-28-2013, 12:59 PM
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Default RE: Engin ID Help w/ pics (1 Fox / 1 McCoy)

The McCoy in it's box looks really pristine.
Old 06-28-2013, 01:00 PM
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Default RE: Engin ID Help w/ pics (1 Fox / 1 McCoy)

I remember flying both those engines back in my 20 years in control line before 1970. I bought the .35 sized McCoy in 1959, it looked the same, and flew it on a Flite Streak and a couple of other planes for several years. It's not a speed engine, but was good for stunt and sport acro. I ran a 10-6 prop and it 1-flip started nearly every time.

The Fox Rocket .35 was sort of an inexpensive knock off of the needle bearing Combat Special. At least that's the way I saw them from my two. It was plain bearing with a 1-piece crankcase as compared to having needle bearings and a removable front housing. Note the boss in the center of the back plate. It has a dimple in the center for drilling and tapping for a pressure fitting. We used crankcase pressure to the tanks of combat and rat race engines in those days. The Rocket ran like a scalded ape, but could also be worked on a little for improvement.

Both engine have porous, cast iron pistons, as I recall, and steel cylinders. They need a high or all castor fuel and a long break-in, maybe up to 3 hours running 4-cycling rich. The castor seasons the piston like your wife's iron skillet. Never run all synthetic in an iron piston engine. The synthetic oil will take the seasoning off the piston in a couple of runs. I imagine that your wife, like mine has, threatened to whack you over the head if you put the iron skillet in the dishwasher and took the seasoning off.
Old 07-02-2013, 03:25 AM
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Default RE: Engin ID Help w/ pics (1 Fox / 1 McCoy)


Bill Mohrbacher the ultimate authority on Fox engines has this information about the 1962 Fox 35 Rocket engines as compared to the earlier ones.




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