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Cox Engine of The Month
September-2021
crankbndr's

"Cherry Bomb" .051 engine

More info on this engine!




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Help! What is this????

Post  mitchg95 Tue Jun 04, 2013 12:05 am

got this today for $5
What is this???? OXQt62Tl
What is this???? D0Ug2D4l
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Post  ian1954 Tue Jun 04, 2013 1:41 am

It is a 1956 Fox Comet 07.

.0698 ci
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Post  ian1954 Tue Jun 04, 2013 7:00 am

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Post  Cribbs74 Tue Jun 04, 2013 8:20 am

Yep,

It's a Fox .07

$5 is a good deal for that. Especially since it has the tank with it. It should clean up well. I've wanted one of those you lucky dog.
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Post  mitchg95 Tue Jun 04, 2013 8:51 am

thanks a bunch guys! glad i can put a size and name to this engine. It needs a new back plate as two of the mounting lugs are busted off
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Post  Cribbs74 Tue Jun 04, 2013 8:59 am

@mitchg95 wrote:thanks a bunch guys! glad i can put a size and name to this engine. It needs a new back plate as two of the mounting lugs are busted off

It can be used without the tank if you wanted to fire it off. I saw a NV on Ebay for $10 if yours is missing.

Ron
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Post  mitchg95 Tue Jun 04, 2013 9:26 am

@cribbs74 wrote:
@mitchg95 wrote:thanks a bunch guys! glad i can put a size and name to this engine. It needs a new back plate as two of the mounting lugs are busted off

It can be used without the tank if you wanted to fire it off. I saw a NV on Ebay for $10 if yours is missing.

Ron

Thanks Ron, I might just strap it to a board, my nv is missing unfortionetely
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Post  Mark Boesen Tue Jun 04, 2013 10:03 am

hey Mitch,

It's actually the second version of the 'Comet' engine made by Fox, your engine was first built in '59-'61 and is the 'long stroke' version with the aluminum spacer used on the P-40, designed to keep plastic from melting. Yours have the second version of tank, so it's probably 1960ish?
They're pretty good engines, like Ron said, cut tank off and use as beam mount, Fox actually did this with all the engines they got stuck with when Comet filed bankruptcy, more power then a Babe Bee

What is this???? P4007211
What is this???? Pictur11
What is this???? 61-k5k10
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Post  mitchg95 Tue Jun 04, 2013 4:58 pm

Thanks everyone, just have to find a needle valve then i can run it. It has really good compression, better than i thought it would have
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Post  Ken Cook Tue Jun 04, 2013 6:08 pm

I'm not so sure that's the .07. It could be the .049. George GCB on the forum has several of the examples and gave a detailed description of those engines some time ago. The reason I'm curious, I believe the .07 had a triangular web casting supporting the front of the case from the bottom. There's some other differences and he's quite knowledgeable in regards to them. I also may have my thought process reversed, That left handed mentality I suffer from. I do own a .07 and one thing that I do recall that stands out from memory without digging it out of the box I have it stored in was the metal ground off of the case. The Comet logo was cast onto the case and then ground off leaving a distinguishable mark. Plugs are also getting harder to locate on these engines. Ken


Last edited by Ken Cook on Tue Jun 04, 2013 6:11 pm; edited 1 time in total
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Post  mitchg95 Tue Jun 04, 2013 6:11 pm

@Ken Cook wrote: I'm not so sure that's the .07. It could be the .049. George has several of the examples and gave a detailed description of those engines some time ago. The reason I'm curious, I believe the .07 had a triangular web casting supporting the front of the case from the bottom. There's some other differences and he's quite knowledgeable in regards to them. I also may have my thought process reversed, That left handed mentality I suffer from. I do own a .07 and one thing that I do recall that stands out from memory without digging it out of the box I have it stored in was the metal ground off of the case. The Comet logo was cast onto the case and then ground off leaving a distinguishable mark. Ken

i think it might be the .07, i compared the piston size of one of my cox .049s with the one in this engine and it is definetely bigger
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Post  Ken Cook Tue Jun 04, 2013 6:22 pm

Looking at Mark's engines, I have the same styles. My engine on the right is the .07, no triangular web casting like I originally thought. The cylinder base is considerably thicker on the .07 compared to the .049 on the left. This is noticeable in Mark's pictures as well. I did notice though that both cases have the grinding marks on the side of the cylinders where I thought this was just on the .07 only. Ken
What is this???? Dscn1827
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Post  mitchg95 Tue Jun 04, 2013 6:44 pm

@Ken Cook wrote: Looking at Mark's engines, I have the same styles. My engine on the right is the .07, no triangular web casting like I originally thought. The cylinder base is considerably thicker on the .07 compared to the .049 on the left. This is noticeable in Mark's pictures as well. I did notice though that both cases have the grinding marks on the side of the cylinders where I thought this was just on the .07 only. Ken
What is this???? Dscn1827

very cool engines indeed Ken Smile I cant wait to run this engine Smile I have a enya .09 with left side exsaust that I need a nv for as well
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Post  Mark Boesen Tue Jun 04, 2013 10:13 pm

The .07 was designed for Comet by Fox to give more power to the heavy plastic Comet RTF's, the .049 came after and was sold as a 'Hobby Engine'.
If you look at Ken's engine you see the one on the left is a Comet redo, where the Comet logo was ground off. Note: both engines are the same size.

A couple winters ago I spent alot of time researching/studying the Comet/Fox engines and with the help of Bill Mohrbacher and old notes from John Krickel, we pretty well got'er figured out. It's all posted on the 049 Collectors forum.

What is this???? 07-04910
What is this???? 61-k3-10What is this???? Fox_0410


Last edited by Mark Boesen on Tue Jun 04, 2013 10:56 pm; edited 2 times in total
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Post  mitchg95 Tue Jun 04, 2013 10:16 pm

Thanks Mark!!! Yup It is indeed the .07, mine has 9 thin fins and flat topped piston
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Post  Mark Boesen Tue Jun 04, 2013 10:46 pm

Ok, here's your baby: Yes, I think we can call it a 1959! Aluminum spacer under cylinder and new for '59, heavier cast fuel tank.

(email Doug Martin: foxengines@aol.com for a needle and a couple glowheads)

What is this???? 59-k2_10


Last edited by Mark Boesen on Tue Jun 04, 2013 10:54 pm; edited 2 times in total
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Post  mitchg95 Tue Jun 04, 2013 10:50 pm

wooo, we have a year of manufacture year! I love having those Smile
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Post  Mark Boesen Tue Jun 04, 2013 10:53 pm

@mitchg95 wrote:wooo, we have a year of manufacture year! I love having those Smile

yep, because we know of product change dates...unless some stinking kid swap parts back in '64!!!
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Post  mitchg95 Tue Jun 04, 2013 10:56 pm

lol, stinking kids
i am looking foward to propping this thing soon
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Post  Mark Boesen Tue Jun 04, 2013 11:10 pm

They're pretty nice engines, like a Cox, use lots of oil, 6x3 prop. Here's a photo of a old photo of a Nobler i designed for a 1/2A contests years ago, i built it with a flat wing for 20 more points...but put flaps on it, the Fox pulled it around pretty nice!

What is this???? 20130612
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Post  mitchg95 Tue Jun 04, 2013 11:53 pm

@Mark Boesen wrote:They're pretty nice engines, like a Cox, use lots of oil, 6x3 prop. Here's a photo of a old photo of a Nobler i designed for a 1/2A contests years ago, i built it with a flat wing for 20 more points...but put flaps on it, the Fox pulled it around pretty nice!

What is this???? 20130612

i like your design Mark, very cool. Any videos of it flying?
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Post  Ken Cook Wed Jun 05, 2013 4:28 am

It appears I have my engines backwards in terms of .049-.07. Thanks for clearing that up. Ken
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Post  Mark Boesen Wed Jun 05, 2013 9:52 am

@mitchg95 wrote:
@Mark Boesen wrote:They're pretty nice engines, like a Cox, use lots of oil, 6x3 prop. Here's a photo of a old photo of a Nobler i designed for a 1/2A contests years ago, i built it with a flat wing for 20 more points...but put flaps on it, the Fox pulled it around pretty nice!

What is this???? 20130612

i like your design Mark, very cool. Any videos of it flying?

nope, the plane was built probably 11-12 years ago. I used it to fly in a 1/2a contest held yearly in Sandwhich, IL. We flew the PAMPA beginner pattern and the rules gave you 20 point for a flat wing, it flew pattern, but the third loop was pretty iffy!

Here's the Beginner pattern: http://www.control-line.org/DesktopDefault.aspx?tabid=35
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Post  mitchg95 Wed Jun 05, 2013 11:03 am

thanks for the link Mark, those patterns look really cool and I will try them once I learn to fly cl planes. Looks like a very good plane Smile
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