Unknown glow heads

Cox International Fri Feb 16, 2018 5:55 pm

Does anyone know for which engine they are? The thread is too big to screw into a Cox .049 cylinder.

Jason_WI Fri Feb 16, 2018 6:03 pm

Maybe Norvel .074 clamp and glow buttons. I have one at home I can check later. The current head clamp looks slightly different on the NV Engines website though.

http://www.nvengines.com/index.php?page=shop.product_details&flypage=flypage-ask.tpl&product_id=188&category_id=6&option=com_virtuemart&Itemid=65

Cox International Fri Feb 16, 2018 6:06 pm

The OD of the treads is 0.57"

Jason_WI Fri Feb 16, 2018 8:12 pm

On my Norvel .074 I measure .624” for the OD of the threads. The glow button big end measures .588” and the stem of the glow button measures .331” and the overall height of the glow button is .659”. The overall OD of the top fin is 1.020”

Jason

Surfer_kris Sun Feb 18, 2018 1:19 pm

What does the inside look like?

It reminds me of The VA .049 MkII which uses a slightly larger thread than the Mk I did, which was the same as on the cox .049 engines.

Just checked one of mine and the threads are about 0.63" OD, so not that one either then...

Cox International Mon Feb 19, 2018 11:44 am

Some more pics.

OD of clamp ring threads: 0.57" / 14.5mm
OD of widest part: 0.749" / 19.02mm
OD of insert flange: 0.496" / 12.62mm
Height of insert: 0.577" / 14.67mm
Thread seems to be between 46 and 48, so possibly a metric thread.

Jason_WI Mon Feb 19, 2018 1:20 pm

Definitely not Norvel inserts.

Maybe Larry over at kitting it together has an idea of what they are. He was importing engines in the early 2000's.

http://kittingittogether.com/contact-us

Cox International Mon Feb 19, 2018 2:06 pm

Thanks Jason.

Surfer_kris Tue Feb 20, 2018 12:59 am

I have never seen that very head before, so my best guess is that it could be an after market head for a Testors McCoy .049? They have a slightly larger thread than the Cox .049...

Just check one and they seem to be 14.1mm, so I guess that is not the one either then...

Cox International Tue Feb 20, 2018 12:19 pm

Was going to auction the set on eBay but, in absence of knowing what they are, they shall go into the bin lol.

Oldenginerod Tue Feb 20, 2018 3:12 pm

Cox International wrote:Was going to auction the set on eBay but, in absence of knowing what they are, they shall go into the bin lol.

BIN???

You can't say that here!!

Cox International Tue Feb 20, 2018 3:18 pm

Yikes, big faux pas lol!

Perhaps we will list them on our site with specs and let buyers decide if the want the package.

**Admin** Tue Feb 20, 2018 3:44 pm

They must be for something.

I'd hang onto them for awhile and see if someone comes up with an engine. Maybe one of us will stumble across something that looks like them on an engine. They look familiar for some reason.

**Cribbs74** Tue Feb 20, 2018 9:45 pm

What is the diameter of a Holland Hornet head?

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Unknown glow heads

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