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Cox Engine of The Month
September-2020
sosam117's

"Traded an electric charger for this "Complete" (original) Cox Thimble Drome Olympic .15 engine. Right corner is photo as received."



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Cox space hopper ball bearings?

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Post  Patrick block on Wed Apr 29, 2020 5:51 pm

As much as I search the Internet I can't find information, not even a photo of the version with bearings of the Cox space hopper, does anyone know more about this rare engine? Thank you very much to all
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Post  Ken Cook on Wed Apr 29, 2020 6:25 pm

I've never seen a ball raced Space Hopper. Not suggesting that some were never made. There's always those myths that some were produced but I've never in my life .   Are you sure your not confusing the Space Hopper with the larger Olympic .15? The Space Hopper doesn't have ball bearings, the crank  rides in the aluminum case like any other Bee.


Last edited by Ken Cook on Wed Apr 29, 2020 6:45 pm; edited 1 time in total
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Post  Mark Boesen on Wed Apr 29, 2020 6:37 pm

I think Mud made one for the tach race years ago, but yes, i don't think there was ever one made. Hopefully Mud will see this and respond.
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Post  Patrick block on Wed Apr 29, 2020 6:40 pm

It is not a confusion, I know very well that the space hoper does not have bearings and that its older brother the Olympic 15 did, I read somewhere that a version of the space hoper 049 was made with bearings but since the performance was not improved it was stopped manufacturing, maybe it was only a prototype, but still I would be very satisfied if you find any photo, I am curious. I'll keep looking....
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Post  Ken Cook on Wed Apr 29, 2020 6:43 pm

I'm sure you came across the same conversation between Tim Wiltse and Bill Robinson. He claims to have owned the engine and now he no longer has it. He also mentions it's the only example he's ever seen himself.


This is what I copied:

The BB version, except for the nose of the crankcase, looked just like the plain bearing version.

The large portion of the case extended fractionally further to accomodate the rear bearing, and instead of remaining a reduced diameter all the way to the prop washer it had an increased section to allow the insertion of the front bearing. As I remember, the prop washer was similar to the TeeDee, to protect and shield the front bearing.

In relative numbers, very few Space Hoppers were made, and only a very small fraction of those were the ball bearing version.

I don't recall ever having seen any other than the one I had.

It was an experiment of Roy Cox's that didn't work, the plain bearing engine would pull more rpm with everything else being the same.

And I've still not pulled out the name of the fellow who prepped the"Special" engines.
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Post  Mudhen on Wed Apr 29, 2020 7:27 pm

I've never seen the ball bearing Space Hopper engines.
Dale Kirn told me about them, but that they were finished a few years before he started at Cox.
My guess was somewhere around 1959.
I do have these, but it's a post hijack.
Still interesting.
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Post  Cribbs74 on Wed Apr 29, 2020 8:27 pm

Pretty cool!
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