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Post  crankbndr on Fri Aug 30, 2013 9:53 am

This is my latest corntraption, keeps me out of the bars. It removes the spray bar from the venturi, ready for tests, just need to come up with a way to mount it.

Cox Killer Bee backplate Img_2111

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Post  Kim on Fri Aug 30, 2013 9:56 am

Cool !
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Post  Cribbs74 on Fri Aug 30, 2013 11:00 am

I really like that. Any chance you could do a writeup?

You might have to build a cage to mount that or use long screws and standoffs. Of course there is always the hole in the firewall option. Problem with that is NV adjustment.

Ron
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Post  microflitedude on Fri Aug 30, 2013 12:51 pm

I made a similar sample a year or two ago, never attempted to start it though. Yours looks much better.

Cox Killer Bee backplate Custom10
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Post  pkrankow on Fri Aug 30, 2013 1:29 pm

DUDE!!! I've been thinking about this too!

My idea is to take a sure start snorkle and put the TeeDee NVA on the top of that with the original venturi bored out to the reed seat diameter. I jut don't have parts yet.

Phil
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Post  anm2 on Fri Aug 30, 2013 1:32 pm

crankbndr wrote:This is my latest corntraption, keeps me out of the bars. It removes the spray bar from the venturi, ready for tests, just need to come up with a way to mount it.

Cox Killer Bee backplate Img_2111

Cox Killer Bee backplate Img_2112
How does the venturi attach to the backplate? Andy
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Post  WingingIt74 on Fri Aug 30, 2013 1:44 pm

That's pretty slick man!
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Post  cryo-one on Fri Aug 30, 2013 6:54 pm

Another   attempt

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Post  pkrankow on Fri Aug 30, 2013 7:31 pm

What size are the threads on the tee dee venturi?

Phil
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Post  dckrsn on Fri Aug 30, 2013 7:41 pm

Phil, that would be 1/4" x 32 tpi, like a standard glow plug.
Weird huh?

Bob
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Post  dinsdale on Sat Aug 31, 2013 6:48 am

That's a really impressive idea. Do you think it would work with one of these carbies?
http://coxengines.ca/cox-.049-.050-.051-tee-dee-carburetor-assembly.html
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Post  crankbndr on Sat Aug 31, 2013 7:14 am

Opening up the backplate for the TD parts I used progressively larger drill bits till till it screwed in, I had a backplate that had never been drilled for spraybar, I must have got it from CI.
Finding a way to mount it is difficult because of the problems Ron mentioned, the NV and fuel input are in the way for any bracket to mount to backplate so some kind of standoffs might work.
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Post  crankbndr on Sat Aug 31, 2013 7:19 am

microflitedude wrote:I made a similar sample a year or two ago, never attempted to start it though. Yours looks much better.

Cox Killer Bee backplate Custom10
Thats pretty cool, you must not have a way to mount or you would have run it. Maybe we can hold them in our hand.Very Happy  Just kidding, don't try that at home.
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Post  crankbndr on Sat Aug 31, 2013 7:29 am

cryo-one wrote:Another   attempt

Cox Killer Bee backplate IGkHj6J
Have you run this yet to see how it works?
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Post  crankbndr on Tue Oct 01, 2013 8:37 pm

This idea was a failure, the venturi could not hold the needle valve body tight so when running the needle valve moved a lot.
When I held the NV in place for a steady run it turned 19.5K (25%N and 5/3 prop) but I can get that on a regular Killer Bee plate.
Back to the boneyard.

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