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Cox .074 Queen Bee nelson plug - Page 3 Empty

Cox .074 Queen Bee nelson plug

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Cox .074 Queen Bee nelson plug - Page 3 Empty done diss befor not same way

Post  davidll1984 on Fri Mar 20, 2020 10:21 pm

Cox .074 Queen Bee nelson plug - Page 3 Image50
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Cox .074 Queen Bee nelson plug - Page 3 Empty my own desing of same engine

Post  davidll1984 on Fri Mar 20, 2020 10:40 pm

is a 1/18 bugy frame mod wit lot part from 1/16 bugy clutch part my own desing flyweel coling on crank case just removed da big cooling head for bether pic of carb in place it used hd crank tee dee piston with black widow cilender ex slit open no spi has twin boost port 1eatch side tuned pipe is made of nitro fuel primer ae bing long time y tes new carb desing my carb best set up is from .o6 ap wasp slide end turn model kwick responce end slow rpm cox tee dee is lost of power sur start perform grate for plane not for cars or boat try find ap wasp carb esy fit to queen bee back plate bing long time done mode to airplane to is lot power gain but wit wasp .o6 wy not just put right in wat y did cox work fine as is for aircraft stil nice improvment good work Cool
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Post  Basswood on Sat Mar 21, 2020 8:31 pm

smooth_bill wrote:Basswood,

Is that really your name?

I've never seen one of those mufflers, but it sure looks like it would be easy to adapt.

I have and still own a few Enya engines, but can't imagine that 492 muffler suiting any of them? What the heck was it made for?

One of my best friends moved to Phoenix over a year ago. I was planning to visit them last year, but he suddenly passed away. I've always wanted to visit the VSC stunt event held in Tuscon now and that would have been a great trip.

Keep me posted on your engine testing please.

I'm hoping to test the new Bernie back plate mount on one of my Pee Wee engines. The only time I've flown a Pee Wee powered c/l airplane (Scarinzi Queen Bee), I was always wishing for a longer engine run. Now I don't fly anymore, but can at least test the back plate mount with a larger tank.

Bill

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Basswood is just a nick name I've had for some time. long story.
I had never seen one of these Enya M492 mufflers before ether. just like the way they looked and figured I would mod one to fit a Cox .049 or Q-B. they do also have larger sizes of available as well. but keep in mind they are made to fit Enya engines so it may take some work to use them on Cox engines. I really think the exhaust is key on these engines as in many cases I've seen it slows down the engine, not good.
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Post  Basswood on Sat Mar 21, 2020 11:48 pm

David
My son in law is into these cars, So I know a little about these cars but not enough to be of much help other than the exhaust is probably key with them too. hopefully we can all learn more about it here with some testing and experiments.
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Cox .074 Queen Bee nelson plug - Page 3 Empty Re: Cox .074 Queen Bee nelson plug

Post  ffkiwi on Tue Mar 24, 2020 12:02 am

Surfer_kris wrote:Those muffler were made for the .049 and .061 engines by Enya:
Cox .074 Queen Bee nelson plug - Page 3 Img_5111

The same design also served the rarely seen Enya 08....AFAIK though-all three engines use the same basic muffler-but with slight differences in the ID of the centre hole-but I've never done a thorough comparison of all three-if anyone has an 08 in their pile, it would be useful to measure the cylinder OD at the exhaust port belt position...

ChrisM
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Post  Surfer_kris on Tue Mar 24, 2020 7:01 am

I have never seen the .08 one around here either, I guess it was only made for the internal market in Japan.

From the labels of the mufflers that I have, the .06 and .08 used the same muffler while the .049 had a dedicated (smaller) one. The upper lip on the muffler is made to fit in-between the lowest cooling fins, so that would have to be enlarged for use on the Cox .074 or .09 engines, I guess.

I doubt that the Enya muffler will be very different from the Cox ones though, I think that the circumferential idea is for ease of production mainly (no keyed cylinder threads on the smaller engines) and it doesn't work as well as an exhaust that matches the port orientation. My best (least restrictive) DYI muffler was made to match the ports and it work very well in terms of a low power loss:

Cox .074 Queen Bee nelson plug - Page 3 Cox_be12
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Cox .074 Queen Bee nelson plug - Page 3 Empty In regards to carburetor mods

Post  Lukemiester on Thu Oct 08, 2020 7:08 pm

I have a queen bee that I haven’t run yet but I saw the carburetor mods that surfer kris had done and I was wondering... is there anything different you would do the next time?
Also has anybody tried the mecoa .09 glow head adapter? On the eBay page the picture shows it on an .074 but they don’t mention anywhere that it can be used on one. I know the threads on the .09 are the same on the .074 but earlier in this thread it said the compression was lower on the .09 head, so just wondering performance and whatnot of that mecoa head
Here’s a link to the adapter I’m talking about: https://www.ebay.com/itm/GLOW-PLUG-ADAPTOR-COX-09-engine-use-standard-long-plug-MADE-in-USA-911-009-/281012094238

Thanks
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Post  ffkiwi on Thu Oct 08, 2020 7:18 pm

Yes it will fit of course-but you would have to experiment with different glowplugs as you could see quite a lot of variation depending on coil cavity size and overall plug reach-plus the individual heat rating. One more option-but what a lot of variables to optimise! Don't forget of course that a standard Medallion 09 or TD 09 head will also work on the Queen Bee-so apart from the original head-plus any aftermarket one-there are two more possibilities.

The Mecoa heads are a low compression option-most closely resembling the Medallion glowhead head in terms of combustion chamber shape. We still seem to be waiting for Greg K to come up with the 074/09 head adaptors for sale...I know he's done prototypes and sent them out for assessment....

ChrisM
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Cox .074 Queen Bee nelson plug - Page 3 Empty Re: Cox .074 Queen Bee nelson plug

Post  Lukemiester on Thu Oct 08, 2020 7:26 pm

ffkiwi wrote:Yes it will fit of course-but you would have to experiment with different glowplugs as you could see quite a lot of variation depending on coil cavity size and overall plug reach-plus the individual heat rating.  One more option-but what a lot of variables to optimise!   Don't forget of course that a standard Medallion 09 or TD 09 head will also work on the Queen Bee-so apart from the original head-plus any aftermarket one-there are two more possibilities.

The Mecoa heads are a low compression option-most closely resembling the Medallion glowhead head in terms of combustion chamber shape. We still seem to be waiting for Greg K to come up with the 074/09 head adaptors for sale...I know he's done prototypes and sent them out for assessment....

ChrisM
'ffkiwi'


Ok... so as far as glow plugs and adapters go which one works the best?
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Post  ffkiwi on Thu Oct 08, 2020 7:41 pm

Read what I wrote earlier-this is not a question that can be answered in absolute terms, a Nelson or turbo plug adapter is better-IF you can find one. If you can't-buy a Mecoa one and experiment. Its that simple! And that applies to ALL the adapters-regardless of source-it is never a case of fit and forget-even the best performing ones require that you test and adjust, shims +/- till you get the best results for your fuel, your prop and the type of model.

ChrisM
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Post  Lukemiester on Thu Oct 08, 2020 7:49 pm

Alright thank you! I’ll look into getting that mecoa adapter
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Post  1/2A Nut on Thu Oct 08, 2020 9:55 pm

Current media reported in this thread:

6x3:
Kris Turbo plug OS P6 / 17.9k / OS P6
Juans Stock Head Converted Nelson Plug / 18.45k
Kamtechnik Prototype OS P4 / 19.78K


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Post  Lukemiester on Thu Oct 08, 2020 10:25 pm

1/2A Nut wrote:Current media reported in this thread:

6x3:
Kris Turbo plug OS P6 /  17.9k / OS P6
Juans Stock Head Converted Nelson Plug / 18.45k
Kamtechnik Prototype OS P4 / 19.78K


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Those are some good numbers... pretty soon there’ll be one with a mecoa head up there!
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