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Old Nov 17, 2011, 06:47 PM
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Adding kerosene to glow fuel?

My question is will adding kerosene to low or zero nitro glow fuel give any increase in power? I'm considering this for a standard glow engine with standard glow fuel.
I have searched the forum and read several of the diesel threads that have touched on this subject but never really gave a clear discussion of it.

Mainly I'm just curious about a possible power boost with out the expense of nitromethane. I know that these compounds have completely different chemical make ups but if a diesel power plant can provide great power can a glow set up gain anything noticeable?

I'm sure someone has tested this so a link or explanation would be much appreciated. If you want to get technical I'd love to here the details.

Thanks
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Old Nov 17, 2011, 07:05 PM
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It will make the engine run lousy and stink. If it gave a boost, someone would have figured it out years ago and we would be using it today. Glow engines run on glow fuel and that's the truth. Methanol, oil, and nitro as a power booster.
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Old Nov 17, 2011, 07:32 PM
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loopnot

If there was a slight chance of a power improvement the Profesional Drag Racers would allready be using it. They are pulling 6,000 HP out of 500 Cu.In. V-8 Engines on almost pure Nitro!

Clancy
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Old Nov 17, 2011, 08:03 PM
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Originally Posted by Clancy Arnold View Post
They are pulling 6,000 HP out of 500 Cu.In. V-8 Engines on almost pure Nitro!
That's near enough to 730 HP/litre but the very best glow engines are around 1000 HP/litre with zero nitro .

But to answer the OP, adding any other fuel to methanol (apart from nitro) will result in less power but give a slight advantage with economy. With model "diesels" it's a different thing altogether because the kerosene component in their fuel is where the power comes from. The ether in the mix is used because it auto ignites at a comparatively low temperature and it then ignites the kerosene.
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Old Nov 17, 2011, 08:51 PM
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Forget adding kerosene, just run it on kerosene:
Glow Engine Running on 2 Parts Kerosene 1 Part Oil (2 min 32 sec)


Check out that nice slow idle.

Kerosene does not mix with methanol.
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Old Nov 17, 2011, 09:01 PM
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Fired up a Super Tigre S-40 on WD-40 once. Didn't really mean to though. I had given it a shot of WD-40 and gave the prop a flip while holding in in my left hand. Much to my surprise, it started and ran . When you are holding a running engine it gets HOT quickly and a little time seems forever . I was heading for the garage door to toss it when it died . No, there was no power to the glow plug , it just fired up on compression .

BTW, WD-40 is just Stoddard solvent (kerosene) and Napthenic oil .
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Old Nov 17, 2011, 09:44 PM
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Kerosene doesn't mix with methanol in the glow fuel. it will settle out on you fairly fast.
if you run nitromethane in the fuel, you cannot mix kerosene or gasoline with it. Which is why the racers use methanol instead. Plus if you go over 50% nitromethane in the fuel, methanol won't mix well either. If I remember they have to add something else to get it to mix in the fuel and not settle out. But I forget now. I never tried using more than 50% nitromethane glow fuel in my engines.
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Old Nov 18, 2011, 12:25 AM
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We used to add nitro benzene. Now they use polypropolene oxide. Castor won't mix in nitro percentages over 50%. Synthetics solved that problem.

There is no way a glow engine will run on kerosene and oil. You need methanol to keep the plug hot and it's the methanol that ignites the fuel mixture through catalytic action with the platinum in the plug. That's why glow engines need some methanol in the mix. They won't run on straight nitro and oil either.
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Old Nov 18, 2011, 12:52 AM
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A little petrol (5%) gives some of the benefits of nitro like a more consistent idle but no power boost. - John.
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Old Nov 18, 2011, 12:54 AM
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In video, I use only K-1 kerosene and and Klotz Super Techniplate. I does indeed run. I even flew an OS .25 LA powered airplane on kero and Klotz. Flew well. Similar power to my standard homebrew 0% nitro glow fuel. Just smelled different and needle setting was more critical. However, the airplane had no throttle control.

Kerosene in no way works as well as methanol in a glow engine. Plus the engine requires preheating for the glow plug to ignite it. I used a propane torch.

Methanol, nitromethane, and oil are what work reliably in glow engines.
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Old Nov 18, 2011, 03:13 AM
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Old ST instructions (of Bluehead vintage) call foe a couple of percentage points of either gasoline or acetone to "keep the fire lit" on slow rich runs.

Here in The Land of Oz, our most widely available source of methanol contains 3% acetone, so no foul in that regard.

The old rule for high nitro was 1% propylene oxide for 40% nitro and an additional perecentage point for every 10% nitro thereafter.

Nirobenzene was outlawed many years ago due to extremely high carcinogenic risks associated.

Have fun,

DF
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Old Nov 18, 2011, 04:59 AM
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Gotta be careful with acetone ... it eats aluminium.

Kerosene won't mix with methanol.

You can use a little petrol as an ignition improver ... but it eats silicon, so a bit of thought required.
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Old Nov 18, 2011, 11:36 AM
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Quote:
Originally Posted by Gary Cee View Post
Fired up a Super Tigre S-40 on WD-40 once. Didn't really mean to though. I had given it a shot of WD-40 and gave the prop a flip while holding in in my left hand. Much to my surprise, it started and ran . When you are holding a running engine it gets HOT quickly and a little time seems forever . I was heading for the garage door to toss it when it died . No, there was no power to the glow plug , it just fired up on compression .

BTW, WD-40 is just Stoddard solvent (kerosene) and Napthenic oil .
You too, eh
In my case it was a Fox eagle .60
Yup, WD-40
Pete
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Old Nov 18, 2011, 02:20 PM
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You guys are great, in my book. I cannot imagine hand holding a running .40 or .60 engine.
:O
But that is nice to know that is something one should not do.
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Old Nov 18, 2011, 03:22 PM
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Back in the 1950's when flying control line team race airplanes with glow plug engines was pretty popular, there was a lot of experimenting with fuel mixtures to try to get the best combination of range and power. Somewhere I have a couple of articles which go through all that.

I've run, on the bench, glow plug engines on commercial model diesel fuel (with ether). They ran exactly as well as they run on glow fuel, but with a much leaner needle setting. The glow plug had to stay hooked to the battery until the engine got warm enough to run properly, 20 seconds or so.
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