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How hot does a glow-head get?

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How hot does a glow-head get?

Post  roddie on Fri Jan 22, 2016 7:32 pm

I'm curious about making a cold-weather accessory.. similar in function to wrapping sewing-yarn around between the fins to retain heat better. I think Phil uses yarn. Just curious how it holds up.. and whether it's a natural fiber, synthetic.. or if it even matters. Does it singe after a few runs? I'm thinking of an alternative.. but need to know how hot the head gets.

I've used sheet-rubber in my Cox mufflers.. which fit around the lower part of the engine cylinder. It's pretty hot there at the exhaust ports.. but probably hotter up near the glow-head?
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Re: How hot does a glow-head get?

Post  roddie on Fri Jan 22, 2016 8:06 pm

Here's my idea.. inspired by my muffler design.. and the fact that it's Cold where a lot of us are.






I know it's a little strange.. Laughing but it doesn't really interfere with anything.. and can be adjusted for where the cooling air hits. The two rubber discs fit spread-apart and between the fins.. wherever you want to put them. It fits tight enough to stay put too.
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Re: How hot does a glow-head get?

Post  Cribbs74 on Fri Jan 22, 2016 8:44 pm

I wonder if just turning down the fins would have the same effect.
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Re: How hot does a glow-head get?

Post  dckrsn on Fri Jan 22, 2016 9:03 pm

These fins are plenty turned down Ron. Smoking
I always thought one of these heads would work well
in the cold (sans heat-sink of course). I have a few of
these, and I should probably put my money where
my mouth is. Lots of snow coming, but not so cold here.....yet.

Bob
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Re: How hot does a glow-head get?

Post  Cribbs74 on Fri Jan 22, 2016 9:44 pm

Bob,

It's probably best to leave those alone since they are on the rare side. To be honest the real problem with the cold is the fuel. It turns to molasses in freezing temps. Makes needling near impossible.

Perhaps just using a regular head with the fins turned down would be a better cantidate for a test. Unless you have a used one of those.

Ron
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Re: How hot does a glow-head get?

Post  pkrankow on Fri Jan 22, 2016 10:10 pm

I like my yarn. It is easy to deal with and then cut away when I am done.

The head remains fairly cool even in warm weather. In this case "fairly cool" can burn you on a warm day. The element is up around 1200F or so, but it is so tiny and it is air-gap insulated from the rest of the head.

It is rather amusing to see a head get extinguished by cooling. The engine sags and quits in a rather straightforward manner.

Sig Champion 25% performs just fine in the upper teens, low 20's F. I have never tried any colder than that. My supply is stored in an attached garage that usually stays about 40F inside, even though it is not heated.

Phil
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Re: How hot does a glow-head get?

Post  roddie on Fri Jan 22, 2016 10:33 pm

To eliminate a variable.. let's say that you pack a warmed quart-bottle of fuel in a homemade coozie made from hand-warmers for at the field? You can even fashion engine-hoods made from them, to slip-on while in transit. Take it off just before cranking. They stay warm for 6-8 hrs... and are bio-degradable! Put it back on when pitting to keep the engine warm while you fly another airplane!
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Re: How hot does a glow-head get?

Post  pkrankow on Fri Jan 22, 2016 10:38 pm

Maybe. Warming the system probably would help some. Fresh batteries are a must, and consider more than 2 D-cells in parallel. I use 3.

Rarely do I have more than one plane out in the winter. I haven't flown at all this winter... My basher got...bashed by the Uncle. Wing over straight into the dirt finished the coroplast wing off and I haven't rebuilt it yet.

Phil
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Re: How hot does a glow-head get?

Post  roddie on Fri Jan 22, 2016 11:47 pm

pkrankow wrote:Maybe.  Warming the system probably would help some.  Fresh batteries are a must, and consider more than 2 D-cells in parallel.  I use 3.

Rarely do I have more than one plane out in the winter.  I haven't flown at all this winter...  My basher got...bashed by the Uncle.  Wing over straight into the dirt finished the coroplast wing off and I haven't rebuilt it yet.

Phil

Well.. I'm sorry about the coro-bashing.. That sucks.. but I imagine that you probably have other airplanes.. and it's always a plus to bring more than one to the field.. right? I'd love to fly this winter. It's been soOoOo long since I've flown.

It would be cool (or should I say.. warm..) to make a heated draw-string satchel for your fuel bottle.. and a heated wrap for your battery box. Those hand-warmers are pretty cheap.. and they generate a lot of heat. Easy to make both with a couple terry-towel wraps with rubber-bands. It would keep things toasty-warm even in sub-zero temps.
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Re: How hot does a glow-head get?

Post  pkrankow on Sat Jan 23, 2016 8:46 am

Well, since my winter flying has usually been in the field out my garage door between the houses... At least until I get the drift fence put up.

This year my youngest daughter has been getting most of my attention. She turns 2 in a few weeks.

The coro-basher was meant to be bashed. I drove it mercilessly into the ground, my brothers drove it mercilessly into the ground. 4 nephews soloed on it, driving it mercilessly into the ground. I just wish I got to SEE the event, I was called away and was letting my nephews run the thing. Uncle hadn't flown CL in over 40 years at that point. I have a cutout but I haven't gotten farther on building another.

I have other planes, but winter flying has not made me want to fly nice things. It might be the glare, it might be the cold. I don't know why but it seems things crash more, and break easier. Maybe the lack of leaves on the trees allow more variable strong winds...

Phil
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Re: How hot does a glow-head get?

Post  getback on Sat Jan 23, 2016 9:01 am

WOW 2 Already I remember when YA'll had that little one , Happy one for the little one Babe Bee ... I think all the cold hand flying wrecks could be from trembling at the controls . I cant do the cold like I use to so I am not going out to fly unless I have to under 70 degrees but , I wonder how some real fine copper wire wrapped in the fins would work it holds heat but you will have that weight issue ?// I hope you can get out there Roger and get some new spark going into flying your building skills are great so may as well have fun with them :bounce :  getback
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