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Does anyone know what this contraption is??? Cox_ba12




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"Cox .049 Circa 1975, custom."

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Does anyone know what this contraption is???

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Post  Cox International Yesterday at 12:19 pm

Does anyone know what this contraption is??? Engine11
Does anyone know what this contraption is??? Engine12
Does anyone know what this contraption is??? Engine10
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Post  Levent Suberk Yesterday at 12:34 pm

Hi Bernie, I think that this engine E.D. fuel tank fitted Cox.
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Post  Cox International Yesterday at 12:41 pm

Levent Suberk wrote:Hi Bernie, I think that this engine E.D. fuel tank fitted Cox.

Sorry Levent but I don't understand ...
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Post  Kim Yesterday at 1:05 pm

There was one entered in one of the "Tach Races" 10 years ago or so.  Should be in the "Class Photos" from that event.

I'll try to find it.  IT DID run, but I can't remember its placing.

Here 'Tis:

Does anyone know what this contraption is??? Tach10

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Post  Cox International Yesterday at 1:11 pm

Thanks but it's a "homebuilt, correct?

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Post  Kim Yesterday at 1:18 pm

Cox International wrote:Thanks but it's a "homebuilt, correct?

Think so...
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Post  gkamysz Yesterday at 2:33 pm

Piston port induction conversion. There have been a few built over the years. There is one pictured on the TD page of Hepperle's site.
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Post  Cox International Yesterday at 2:42 pm

Just looked it up and it's Andrew Coholic's conversion from 1999.

Thanks everyone!

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Post  Levent Suberk Yesterday at 2:48 pm

Cox International wrote:
Levent Suberk wrote:Hi Bernie, I think that this engine E.D. fuel tank fitted Cox.

Sorry Levent but I don't understand ...

I thought that it is an E.D. engine fuel tank fitted to Cox .049, but it is not. It must be a home built TD with a thimble as a fuel tank.

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Does anyone know what this contraption is??? Scree186
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Post  Cox International Yesterday at 2:50 pm

Yes Levent, and the engine has now been identified Smile
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Post  gkamysz Yesterday at 4:22 pm

I just looked again and see it's identified as SP .049, Side Port. Coholic's used a TD case, while this one uses Space Hopper parts.
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Post  GallopingGhostler Yesterday at 4:35 pm

Levent Suberk wrote:It must be a home built TD with a thimble as a fuel tank.
Does anyone know what this contraption is??? Scree186
Adds new meaning to Thimble Drome. Very Happy

Could the crankcase be from a .049 Sportsman?
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Post  rsv1cox Yesterday at 5:06 pm

Does anyone know what this contraption is?

I don't know, but I sure want to build one.  Gathering parts, my Mothers old sewing kit will have to give up a Thimble.

Does anyone know what this contraption is??? Engine19
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Post  GallopingGhostler Yesterday at 5:11 pm

My bad, Doh!  the .049 that looks like my .15 Sportsman is a Space-Hopper, https://sceptreflight.com/Model%20Engine%20Tests/Cox%20Spacehopper.html as mentioned by  @gkamysz. Very Happy

The experimental sideport is an interesting concept, but overall, the sideports although considered easy starting (Fox .09 Rocket and AC Gilbert Thunderheads come to mind), they were not that powerful.

If I had a Space-Hopper, I'd keep its reed valve and rest as original. Cool
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