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


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No mounting hole horseshoe backplate

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No mounting hole horseshoe backplate Empty No mounting hole horseshoe backplate

Post  Jason_WI on Sun 03 May 2020, 13:55

Scored my first no mounting hole horseshoe backplate. The Cox engine handbook mentions it and that very few were made. Doesn’t even have a picture of one. Top engine in the first pic. Pic 5 has a close up.

https://www.ebay.com/itm/153914791936

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Post  Levent Suberk on Sun 03 May 2020, 14:28

That mount plate is a part of Fokker Triplane, however I don't know how it can be mounted on model, perhaps it slides into a rail.

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Post  Marleysky on Sun 03 May 2020, 17:11

That’s a pretty cool find!! Good eyes there Jason! OK now ya gotta Print a mount for it!
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Post  Oldenginerod on Sun 03 May 2020, 17:34

I reckon I have one of those in my stuff. I'll have to dig it out. I seem to recall that it may have the two lower holes rather than none.
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Post  dckrsn on Sun 03 May 2020, 18:58

Good on you, Jason.
I remember discovering my first. Kinda goes
hand in hand with the postage stamp backplate
without the tabs on the sides.
Bob
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Post  roddie on Sun 03 May 2020, 19:45

I see that the Cox Fokker DR1 model's engine came with the protective steel tab that covered the engines' exhaust-port and had a mounting-flange that mirrored the crankcase gasket. I guess it was a later effort (following the mesh screen?) to prevent burns to the fingers whilst tuning the engine.

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Post  dckrsn on Sun 03 May 2020, 20:51

Roddie, Cox actually made 3 different height deflectors. I
guess it had to do with exhaust porting, per the Daniels/Sitter
handbook. Huh... It took me a while to find the correct one for
a Spook restore.
Oh yeah, the "Radiator Clamp" deflector too.
Bob


Last edited by dckrsn on Mon 04 May 2020, 17:17; edited 1 time in total
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Post  Cribbs74 on Sun 03 May 2020, 21:54

Going to show my ignorance here, if it’s a Fokker engine how can it be rare? Was it changed somehow or was it just a short run in the Fokker.

Glad you got it though!
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Post  Jason_WI on Sun 03 May 2020, 22:11

6000 horseshoe backplates without mounting holes were made before switching to the version with holes. Not rare but hard to find. Kinda like windup drive plate engines.
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