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HelicopterEngines Plugs Mufflers Fuel › Glow fuel and kerosene mixture
04-13-2008 01:17 AM  9 years agoPost 1
bmw

Senior Heliman

Lake Zurich U.S.A.

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The main ingredient in glow fuel is methanol, which ignites at a rather high temperature. The compression of the engine plays a part in raising the temperature, but not high enough to ignite it under normal conditions. The hot platinum element in the glow plug causes the mixture to ignite. The nitromethane in the fuel liberates oxygen to help alcohol burn faster. The faster the alcohol burns, the more you can burn to produce more power.

Would adding a mixture of kerosene to the glow fuel help to burn the fuel at a lower temperature to burn more glow fuel and produce more power? or would it over heat your engine?

Runway? what runway??

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04-13-2008 01:30 AM  9 years agoPost 2
Eury

rrProfessor

Dover NH

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I dunno, but where in the world did you get the idea from? It just seems so random.

Nick Crego

Citizen #0168

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04-13-2008 02:34 AM  9 years agoPost 3
tchavei

rrProfessor

Portugal

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Well... knowing that kerosene is cheaper around here than gasoline (not to mention Nitrmethane) I hope you will personally test it and report back.

Tony


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"Perfection and patience usually walk side by side..."

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04-14-2008 04:14 AM  9 years agoPost 4
MartyH

rrProfessor

USA

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I think if you add kerosene to glow fuel the fuel wont even work. The fuel does not ignite, it catalyzes. There is a reaction between the fuel and the platinum in the glowplug. Kerosene will likely ruin that reaction.

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04-15-2008 07:16 AM  9 years agoPost 5
jedijingle

Heliman

Sun Diego

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the kero will burn on a plug, that is how the turbine engines run. I do not think that the two fuels will even mix together properly. I do beleive they would just seperate. It Won't work and not worth the effort. In a perfect world if it would work. The nitro would give you more power at a lower temp, reguardless you would have to rejet the carbs and need new needles.

Kero has a flash point at 220 degrees C and Nitromethane at
35 degrees C. So kero would actually burn much hotter than nitro fuels.

Kero is very simiular to Diesel fuel. If it worked we would already be doing it. Good Idea though. keep burnin nitro.

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04-15-2008 01:49 PM  9 years agoPost 6
bmw

Senior Heliman

Lake Zurich U.S.A.

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Thanks jedijingle that's the kind of answer I was hoping to get

Runway? what runway??

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04-15-2008 01:57 PM  9 years agoPost 7
playfair

Key Veteran

Rochester, NY

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Why not just loose the glow plug and convert the engine to diesel?

http://davisdieseldevelopment.com/

I haven't heard of anyone doing this to a heli, but don't see why it wouldn't work. The gearing may have to change. Also expect quite a mess as the exhaust is black, and your car will smell like a kerosene heater. The fuel used is a mix that is only a little cheaper than glow fuel, but the economy is about double.


The sky is our canvas

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04-15-2008 02:01 PM  9 years agoPost 8
bmw

Senior Heliman

Lake Zurich U.S.A.

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The diesel is what got me started thinking about the fuel and the kerosene I don't think it would work in a heli unless like you said changing all of the gears.

Runway? what runway??

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04-15-2008 02:14 PM  9 years agoPost 9
helimatt

Elite Veteran

Lafayette, IN

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I read some posts about the diesel conversion, tried in helis. It did not work well, as the motor was difficult to tune, and not very powerful. Good economy I guess, so save it for your piper cub.

Diesel or Kerosene in a conventional glow engine might pre-ignite causing rough running or damage to the engine. I am not sure it would be friendly to the glow plug in any case- but pre-ignition would cause the element to fail quickly.

If you want economy, run low nitro fuel, or go gasser, or small electric!

Never, ever, ever, ever give up.

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04-15-2008 02:23 PM  9 years agoPost 10
MartyH

rrProfessor

USA

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You obviously have never run a diesel model engine. They stink, they are messy and very fussy. They hit way too hard for use in a heli anyhow. They make a ton or torque. Not the smooth high rpm's we need.

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04-15-2008 03:49 PM  9 years agoPost 11
jschenck

rrProfessor

La Vista, NE.

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I have heard that adding a few oz of gasoline, specifically camper fuel, to a gallon of fuel will measurably increase the power of a glow engine.

But I'd try it in an airplane with a $50 engine first.

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04-15-2008 04:03 PM  9 years agoPost 12
shuttlepilot

Elite Veteran

Mullins, South Carolina

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When I was mixing my own fuel for glow engines, I would add a little acetone to the mix to help smooth out the idle. I always used tuned pipes to achieve the power I wanted. This was using 0% mix, only methanol and 16% oil.
Now I just mix gas and 4 oz of oil.....

Gas is Great
Camper Fuel is Better!!
QWW Helis

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04-15-2008 04:14 PM  9 years agoPost 13
MartyH

rrProfessor

USA

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just remember that the byproduct of acetone is acetic acid and is very corrosive to the model engine.

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04-15-2008 04:49 PM  9 years agoPost 14
tchavei

rrProfessor

Portugal

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I hear some people mixing up to 1% of acetone to spike the fuel but I never tried it myself. For now its 20% nitro and 23% KL-198

Tony


--------------------
"Perfection and patience usually walk side by side..."

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04-15-2008 04:53 PM  9 years agoPost 15
shuttlepilot

Elite Veteran

Mullins, South Carolina

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just remember that the byproduct of acetone is acetic acid and is very corrosive to the model engine.
I ran it for 2 years without issue....or I should say no more of an issue with corrosion that with running nitro...

Gas is Great
Camper Fuel is Better!!
QWW Helis

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04-15-2008 06:34 PM  9 years agoPost 16
2LTime

Key Veteran

Walworth,NY

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Acetone works great, and if I put my fingers in the exhaust it removes my nail polish. It's a win -win.

Jeff

If you can't learn to do it well, learn to enjoy doing it badly.

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04-15-2008 06:53 PM  9 years agoPost 17
nivlek

rrProfessor

Norfolk England

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I was advised by a clubmate who is an industrial chemist that acetone may damage the seals in the carb .
Years ago , in the late 70's , our club's experts use to add 3-5% petrol to their fuel (80/20 methanol oil) in the winter to improve the tickover in cold weather .

At the end of the day , it gets dark .

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04-15-2008 07:59 PM  9 years agoPost 18
tchavei

rrProfessor

Portugal

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Well I wish I knew what those manufacturers use to spike the fuel with.

Tony


--------------------
"Perfection and patience usually walk side by side..."

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