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Cox Engine of The Month
October-2020
Jason_WI's

"Pieces and parts RR-1. New crank, rotary valve, and drive plate. Early #1 cylinder. Drilled out golden bee backplate. Battle hardened crankcase and tank."



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Anyone ever seen one of these ?

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Thinking Anyone ever seen one of these ?

Post  happydad on Thu Sep 24, 2020 3:05 am

Evening All:
     While looking for deals on the usual site i stumbled on this:

Anyone ever seen one of these ? Coxavi10

Has anyone ever seen one of these. It looks like the Queen Bee reed holder +

Anyone ever seen one of these ? Coxavi11

I would like to fid out if it is for the Queen Bee, or for another size Cox Engine.

HELP ME PLEASE.

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Thinking Re: Anyone ever seen one of these ?

Post  Jason_WI on Thu Sep 24, 2020 3:11 am

It was for the Cox Avion P51B Bendix Trophy Racer airplane. Used this special backplate and needle valve. I have one or two in my collection.
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Post  happydad on Thu Sep 24, 2020 3:22 am

Jason_WI wrote:It was for the Cox Avion P51B Bendix Trophy Racer airplane. Used this special backplate and needle valve. I have one or two in my collection.

Jason_WI: I saw the plane, but the engine looked like a normal horseshoe backplate engine from the picture I saw. Did it need a special backplate? How was the reed-needle valve assembly mounted?

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Post  batjac on Thu Sep 24, 2020 3:46 am

I have one of these in the spares box also. It was also used on another plane, but I can't remember which at the moment.

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Post  getback on Thu Sep 24, 2020 7:45 am

I have 1or2 of those also , didn't know what they fit or how its held in ?
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Post  Mudhen on Thu Sep 24, 2020 8:54 am

Anyone ever seen one of these ? Shinn_10

It was used for the Avion Shinn 2150-A.
First using turned aluminum, then later in Delrin, (various colors.)

Anyone ever seen one of these ? Shinn_11
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Post  Oldenginerod on Thu Sep 24, 2020 5:15 pm

The Delrin version looks identical to the Testors Pipe Bomb rear end, except it had a ridge to clip it into place. Huh...
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Thinking Re: Anyone ever seen one of these ?

Post  batjac on Thu Sep 24, 2020 5:47 pm

That's it!  The Shinn is what I was thinking of.

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Thinking Worth $20...

Post  happydad on Thu Sep 24, 2020 8:52 pm

getback wrote:I have 1or2 of those also , didn't know what they fit or how its held in ?

get back: according to the seller, this item is worth $20. That is one of the things that tweeked my interest. Also the fact that the air intake is similar to the Queen Bee, but smaller. I have been thinking of making something  like this to stick on the back of a standard extruded Cox engine. Other people have made things already, but used a lathe to make one. I need to finish cleanup of the garage now!
   I have even used the old gray horseshoe backplate and tried different ways of getting air and fuel mixed and into the back of the gray backplate. More to try.

If you are interested in letting me borrow 1 of those bad boys, or sending me the measurements, I would be forever indebted.

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