Re: Cox .074 Queen Bee nelson plug

Lukemiester Mon Dec 14, 2020 10:01 am

aspeed wrote:
davidll1984 wrote:The link To the plug adapter is Good https://www.ebay.com/itm/GLOW-PLUG-ADAPTOR-COX-09-engine-use-standard-long-plug-MADE-in-USA-911-009-/281012094238 except for Most canadien wont chip To Canada very disapointed y hate those saler wil have To search for new seler y just use qwean bee wating To Find one
Maybe deal with him directly rather than through feebay. There is a guy that sells motors 'Mike Goes Flying' that will not sell to Canada as well. I think he made the choice on his own. Shipping is likely pretty high in any case. I will wait till my plugs burn out, and then drill and tap for a turbo plug. He has some other nice stuff though.

So... drilling out burned out .09 plugs to accept a normal glow plug...?
Damn!

That’s smart

aspeed Mon Dec 14, 2020 10:27 am

No, not a regular glow plug, there is a loss of power. Drill and tap for a Turbo style plug. There is a taper on the bottom of the plug for the seal instead of a copper washer. Gives the same or better performance than a stock head. A bit harder to prepare the hole than for a 1/4" 32 plug, but worthwhile. They are a bit longer thread than a standard plug so they will not always work in all instances, but will for most Cox motors over .020. The Kamteknic plugs are essentially that.

Lukemiester Mon Dec 14, 2020 10:28 am

aspeed wrote:No, not a regular glow plug, there is a loss of power. Drill and tap for a Turbo style plug. There is a taper on the bottom of the plug for the seal instead of a copper washer. Gives the same or better performance than a stock head. A bit harder to prepare the hole than for a 1/4" 32 plug, but worthwhile. They are a bit longer thread than a standard plug so they will not always work in all instances, but will for most Cox motors over .020. The Kamteknic plugs are essentially that.

I see... very interesting!

aspeed Mon Dec 14, 2020 10:34 am

The Nelson plug is very similar to a Turbo style plug except the diameter is about 1mm larger. The Nelson's normally cost a bit less though. Smaller motors than a .15 I like to use the Turbo plugs anyway.

Lukemiester Tue Dec 29, 2020 2:53 pm

I got my engine running yesterday and did some testing today. With the MECOA glow head adapter and a k&b medium heat idle bar plug (that one had the best top end and idle out of my plugs) it idled nicely around 5000 rpm, had an ok transition, and had around 16500 rpm on a cox black 6x3 prop. Airbleed hole is .040”
video coming later today

1/2A Nut Tue Dec 29, 2020 5:28 pm

This is the power to beat.

Aug 14, 2019

Cox Queen Beast .074 / Kamtechnik Turbo Plug Adapter Test
Works with the .074 and Tee Dee .09
Static Peak 19,783 rpm / .214 hp - 158w / 56.2 mph pitch speed
Impressive 23.3 oz thrust!
OS P4 turbo plug / 25% nitro / 20% oil
This is now a viable power house well exceeding the TD .051

Lukemiester Tue Dec 29, 2020 7:27 pm

1/2A Nut wrote:This is the power to beat.

Aug 14, 2019

Cox Queen Beast .074 / Kamtechnik Turbo Plug Adapter Test
Works with the .074 and Tee Dee .09
Static Peak 19,783 rpm / .214 hp - 158w / 56.2 mph pitch speed
Impressive 23.3 oz thrust!
OS P4 turbo plug / 25% nitro / 20% oil
This is now a viable power house well exceeding the TD .051

Wow those are some really good numbers

Lukemiester Tue Dec 29, 2020 7:43 pm

One thing i probably should mention: the mecoa adapter did have less compression than the stock adapter, however it has plenty of room for long plugs. My stock head was in need of replacement so I thought I’d get some numbers on this one since it hadn’t been tested.

Jason_WI Tue Dec 29, 2020 9:08 pm

1/2A Nut wrote:This is the power to beat.

Nothing beats displacement. I need to fire up my Queen Bee .09.

dckrsn Tue Dec 29, 2020 9:42 pm

Jason_WI wrote:
1/2A Nut wrote:This is the power to beat.

Nothing beats displacement. I need to fire up my Queen Bee .09.

Right there with you, Jason. I have a few big fillies, waiting for their day.
Neighbors gonna love it. (i have good neighbors). What?

Bob

Lukemiester Wed Dec 30, 2020 12:06 am

1/2A Nut Wed Dec 30, 2020 4:26 am

Thank you for sharing Luke!

Santa

aspeed Wed Dec 30, 2020 9:51 am

Looks like a good runner and the .040" bleed hole gives a reliable idle for touch and stops...goes.

Lukemiester Tue Feb 16, 2021 10:51 am

i ran it again yesterday and found the needle valve seal was leaking so i put some fuel line in place of the spring
ran really great and it seems to like the heavier prop (I cut down a APC 7x4 to a 6x4 and it’s MUCH heavier than the cox black 6x3)
and
it idled for 15 minutes straight with no problems at all!

Marleysky Tue Feb 16, 2021 5:42 pm

1/2A Nut wrote:Thank you for sharing Luke!

YEE HAA! That was fun....went for a boat ride Too!

https://m.youtube.com/watch?v=4eZK0dr1n8E&t=424s

Lukemiester Tue Feb 16, 2021 7:56 pm

Marleysky wrote:

YEE HAA! That was fun....went for a boat ride Too!

https://m.youtube.com/watch?v=4eZK0dr1n8E&t=424s

Haha! You just made my day Very Happy

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Cox .074 Queen Bee nelson plug