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Cox Engine of The Month
August-2024
balogh's
![](https://i.servimg.com/u/f95/15/46/86/41/1_balo14.jpg)
"Cox TD09 R/C Beast of Burden featuring Kamtechnik head and DIY metallic fuel nipple"
![](https://i.servimg.com/u/f95/15/46/86/41/sponso12.png)
PAST WINNERS
balogh's
![](https://i.servimg.com/u/f95/15/46/86/41/1_balo14.jpg)
"Cox TD09 R/C Beast of Burden featuring Kamtechnik head and DIY metallic fuel nipple"
![](https://i.servimg.com/u/f95/15/46/86/41/sponso12.png)
PAST WINNERS
Golden Bee basic running problem
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Re: Golden Bee basic running problem
DaveyMo wrote:Ah, now we’re talking! I swapped out the needle to an older version and she runs just fine. Sweet motor it is. Thanks, Chris.
Balogh: The P-C are very clean. Like so many of the Cox 049s here stateside, the parts I have come from motors run only once or twice. I have a source for an original Number 2 cylinder and I might go with that for longer flights.
Dave Mo…
Davey Mo-its the little things like this that can catch you out-and you only find out by chance..or by someone who's been there before telling you. An analagous situation arises with the British DC engines-which if you're unfamiliar with them, ranged from the Bambi of 0.15cc thru, 0.5, 0.75, 0.76, 0,.8, 1 1.5 2.5 3.5 and 5cc...at various times. we'll forget about the Bambi and 3.5 and 5cc models-(which used their own unique NVAs)-but the 0.5-2.5cc range -often branded as DC Quickstart -all used what appeared to be the same needle valve assembly-totally conventional-a brass spraybar and nut, a steel needle and an alloy thimble, with a two sided tension spring-all very distinctive as a 'DC NVA'....except that there was one subtle difference-the length of the tapered portion of the needle projecting past the thimble. is different -depending on the size of engine-so one size fits the smaller 0.5 and 0.76cc dart and Merlin, a different -but otherwise identical sized unit-except for the needle length-fit the bigger spitfire and Sabre models You can see a repro one here:
https://www.ebay.com/itm/116245172240?itmmeta=01J4AVDB0T3ZRWV6QJ52Z680H3&hash=item1b10c09010:g:WYIAAOSwB1Vgios2&itmprp=enc%3AAQAJAAAA0BxHpNaPqTNJg4YhidbMO6QNEFIKht57%2F9TwXTLWqNfq1XUNFPht6cF3q%2FchOkuKBOkdSrBQZIv
You can imagine that if the needles are swapped-things will be quite different in terms of settings-even though the functionality of the needle is unaltered-a 0.5 diesel needs a lot less fuel every revolution than a 1.5cc one. Again something you only find out the hard way-and because the needles are visually indistinguishable at a glance-you only notice the difference if you compare two different ones side by side...
ChrisM
ffkiwi- Gold Member
- Posts : 381
Join date : 2018-07-10
Location : Wellington, NZ
Re: Golden Bee basic running problem
Excellent tip Chris….. Going in my repairs file!!….. I haven’t ran into that one before but I could see it being very frustrating if one didn’t know …. Thanks for sharing it
![Very Happy](https://2img.net/i/fa/i/smiles/icon_biggrin.png)
rdw777- Diamond Member
Posts : 1531
Join date : 2021-03-11
Location : West Texas
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» Babe Bee running Problem
» 70s Golden Bee not running
» golden bee running issue
» "Racket Is Golden" Bernie's Backplate on a Golden Bee
» COX TeeDee 010 extended run tank/mount
» 70s Golden Bee not running
» golden bee running issue
» "Racket Is Golden" Bernie's Backplate on a Golden Bee
» COX TeeDee 010 extended run tank/mount
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