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Strange looking Olympic. 15 Cox_ba12




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April-2024
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"Kress ducted fan with new Cox Conquest 15 RC"



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Strange looking Olympic. 15 Empty Strange looking Olympic. 15

Post  Boats13 Wed Feb 28, 2024 5:04 am

Did COX ever offer a factory "choke valve" throttle for the Olympic. 15? It appears to be threaded in, just like the venturi.  It is not anodized,  nor is it polished. The body is cube shaped with a long actuator arm. It's attached to a long intake tube and has a simple non-fluted straight short tube on the outer end. It has a screen across the large opening,  so you can't tell if has a rotating barrel or butterfly  valve. If it's homemade,  it's very well machined.  The rest looks like standard Olympic.

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Strange looking Olympic. 15 Empty Pics of said Olympic

Post  Boats13 Wed Feb 28, 2024 12:33 pm

Strange looking Olympic. 15 Screen12
Strange looking Olympic. 15 Screen13


It is on the evilBay. There are 8 of us watching it. The seller hit a motherlode of Oly's and Sportsmans (is that even a word?) He has the Sports priced higher than the Olympics.

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Post  1/2A Nut Wed Feb 28, 2024 2:24 pm

Having bearings will help make a great project engine for a boat.
Bearing with IC boat project is really the best way to go.
Outrigger hydro or sports boat with a muffler and pressure tap.

RISE RC setup here with a converted TD .049 / Sportsman backplate

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Strange looking Olympic. 15 Empty Couldn't find Rise RC

Post  Boats13 Wed Mar 06, 2024 5:05 pm

Neat looking setup! Did they just use reeds and cap off the front rotary valve? The $300+ with shipping was just too much for me to justify for my Prairie Bird kit. But man what a sound it would make, I think your right!

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Post  1/2A Nut Thu Mar 07, 2024 11:11 am

Yes, the front was sealed up with a plastic body and the backplate was swapped out
with a Sportsman .049 backplate with a high speed reed.
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