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Post  poorbs Tue Dec 18 2012, 14:23

Can someone tell me what the recommended prop size and nitro % for a Cox Medallion .15 is, and how does this engine compare to the TD .15 in terms of RPM or power?

Thanks
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Post  Jason_WI Tue Dec 18 2012, 15:28

8x4 prop and 25% nitro should get you 13k to 14k RPM on a Medallion 15. My TD 15 Special Mk II will get 16.1k with an 8x4 prop and 25% nitro.
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Post  Admin Tue Dec 18 2012, 15:32

Here's some charts taken from the Medallion and TD manuals. Those manuals are free to download at the link located in the sidebar on the left just above the Cox Engine of the Month.

Recommended prop size for Medallion .15 Medall10

Recommended prop size for Medallion .15 Tee_de10

As for the kind of prop, fuel and location used for the above tests, I can't say. However, a few other manuals say this.
Recommended prop size for Medallion .15 Test_r10
(Race Power Fuel being 30% Nitro, 20% oil with 18% of it being Castor)

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Post  Cox International Tue Dec 18 2012, 16:01

poorbs wrote:Can someone tell me what the recommended prop size and nitro % for a Cox Medallion .15 is, and how does this engine compare to the TD .15 in terms of RPM or power?

Thanks

If you are looking for the original Cox 8x4 competition prop, here it is:

http://coxengines.ca/cox-.049-.15-texaco-propeller-grey-8-x-4.html
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Post  John Goddard Thu Dec 20 2012, 04:17

I'm probably wrong but I thought that Cox
Fuel was 15+25 % nitro blue and red cans.
Very Happy
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