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Cox Engine of The Month
September-2021
crankbndr's

"Cherry Bomb" .051 engine

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Post  944_Jim Sun Apr 22, 2018 2:49 pm

Hi All,

Please help with a decision. I have been working on a BRM from tracings I found on OZ and HPA.

Now that I'm close to final assembly, I wanted hard numbers on bellcrank assembly and engine mount details.

Today I found a copy of Pat King's BRM clone. I hope he chose to up-size the wing...or I blew printing the original patterns. His root chord is five inches, while mine is four inches.

This kit is going to a boy at church...so it really needs to be able to stay in the air, and land with durability in mind.

What is the root chord on the original BRM?
Should I make a new wing?

Thanks in advance for any help you can provide...I'm all ears (well, eyes).



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Post  NEW222 Sun Apr 22, 2018 3:22 pm

Replied. See your e-mail..... Very Happy
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Post  944_Jim Sun Apr 22, 2018 3:55 pm

@NEW222 wrote:Replied. See your e-mail..... Very Happy

Big THANKS to Chancey.

It turns out I cut my wood based on his BRM templates. I lost the ones I used for patterns. He generously supplied his copies, and they confirm that I'm on the right track with this bird.
Completed pics with new owner will follow soon!
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