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All Forums >> Glow Engines, Gas Engines, Fuel & Mfg Support Forums >> RC Fuels >> RE: Changes?
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RE: Changes? - 5/27/2006 1:11:41 PM   
Dr Nitro


 

Posts: 162
Joined: 11/12/2002
From: The Great Midwest, USA
Status: offline 		Ian,
You can run a zero percent nitro mixture through your rc car. I take it you are in an American or European compound in Jeddah as a contract worker?
Anyway, if you can get your hands on methanol and castor oil then you can mix up a blend of about 12% to 14% castor oil and the balance methanol for your rc car. You will want to remove the head shim or shims from it and find the hottest glow plug you can. You will have to tune it very differently than you would with nitro and it will run but with out as much power and not as crisp of a transition because these engines were designed for some nitro, not zero nitro. Tuning will have to be very precice when using fuel without nitro in a car engine.
To help idle and transition you can add up to 5% pure acetone in place of some of the methanol, but start with 2% or 3% if you can find it. If you are in an American compound there, acetone should be rather easy to scrounge up.

This has worked for many many service men in Iraq and various parts of the region that brought their rc cars and trucks with them. Some have had good success and others have had some success, but they were all running their trucks and killing spare time and boredom. If you are good on the needles, then you will have better success than someone that is not.

Hope this helps

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       Post #: 201

RE: Changes? - 6/14/2006 9:53:53 PM   
olstoney



Posts: 1193
Joined: 4/6/2004
From: Cape Coral, FL, USA
Status: offline 		Hello All,
Hope to get some honest answers about a dilemma. Due to some health issues I may have to give up flying in the near future . I have used Powermaster 20/20 in my 4 strokes and Wildcat Super Premium 15% in my 2 strokes. That being said, I have quite a few gallons of fuel still sealed that is kept in a climate controlled room.

It looks like perhaps an R/C truck like a REVO 3.3 will be something that I can operate from my home. After reading many posts about the car specific fuels having less of an oil content, is there some way that my airplane fuel could be salvaged for use in the truck engine?

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       Post #: 202

RE: Changes? - 6/15/2006 5:05:16 AM   
downunder



Posts: 3012
Joined: 10/10/2002
From: Adelaide, AUSTRALIA
Status: offline
quote:

ORIGINAL: olstoney
After reading many posts about the car specific fuels having less of an oil content, is there some way that my airplane fuel could be salvaged for use in the truck engine?

If it were me I'd just use the plane fuel in the truck and not worry about wearing out the engine anywhere near as fast

(in reply to olstoney)
       Post #: 203

RE: Rc Fuel Faq - 7/5/2006 11:52:18 PM   
ZebraOne


 

Posts: 33
Joined: 7/27/2004
From: Fallon, NV, USA
Status: offline 		Fuelman
Does anybody know why a tartan twin will always have one cylinder run hotter than the other?

The engine runs very well. I'm using 5%Syn with methonol and 2% nitro. The elevation here is 4000". I have the thing mounted in the big Chipmunk (81"
It starts easy and turns 72K with a 20 X 8. It has new Gloplugs, rated on the cool side. The rear, or rt cylinder runs @ 280F and the front runs at 210F. It idles well @ 2500, but slowly will loose the cooler cylinder.
The rings are free and the engine has no loose parts, bearings, etc.
Any help from old Tartan runners would be appreciated.

Zee
AMA129570

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       Post #: 204

RE: Changes? - 7/6/2006 2:59:06 PM   
Fuelman


 

Posts: 980
Joined: 12/31/2001
From: Jordan, NY, USA
Status: offline 		Zee,
I do not know why the tartan twins run one side hotter than the other. I have never owned one so I can only guess that both sides are not getting identical mixtures, its only a guess. On your cool side to help keep it from flaming out you can try a slightly hotter plug or use a baffle to block a little of the airflow across the cylinder to help it retain its heat.
I wish I could help you more on this one, someone else here may be able to chime in and offer some help.


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       Post #: 205

RE: More Q&A - 7/10/2006 1:01:04 AM   
MassiveMods



Posts: 1557
Joined: 11/23/2003
From: SydneyNSW, AUSTRALIA
Status: offline 		Hey Fuelman BB

I have sent you a PM as to why the pressure line is coiled and the phenomena that occours relating to this . have a read and post it if you like .. I have only read up to page 4 so far and dont know if this issue has been addressed ..

BM

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       Post #: 206

RE: Changes? - 7/10/2006 1:15:37 AM   
MassiveMods



Posts: 1557
Joined: 11/23/2003
From: SydneyNSW, AUSTRALIA
Status: offline 		Just found a pic of the tartan twin 40

I have no idea about Airborne engines really but at a guess could the fact that they are an off set boxer style engine be the cause of one cylinder being cooler than the other ? One is closer to the prop, is that the one thats cooler. Also the intake distributon through the crank, is it favoring one side over the other because of the lower pressure vaccum caused by the hotter running cylinder.. ? maybe you need to run a slighly different pipe on the cooler cylinder to equalise pressure.. , Block the cowling intake to the cooler head , chop off some cooling fins on the cooler one.. ( Fuelman will like that one) I dunno im guessing here ...

< Message edited by MassiveMods -- 7/10/2006 1:45:14 AM >

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       Post #: 207

RE: Changes? - 7/13/2006 3:30:40 AM   
hpi apollo



Posts: 2639
Joined: 5/13/2006
From: Georgetown, KY, USA
Status: offline 		anyone here use motul micro oil in their mixes? i think my local moto shop has some and i heard it was awesome stuff


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       Post #: 208

RE: Changes? - 7/13/2006 4:22:27 AM   
RaceCity



Posts: 1842
Joined: 7/10/2002
From: NotUpNorth, USA
Status: offline 		Jan Karlson (sp?) aka: "Jaka" swears by the Micro Motul oil.

He says it's an excellent oil.

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       Post #: 209

RE: Changes? - 7/13/2006 5:25:02 AM   
hpi apollo



Posts: 2639
Joined: 5/13/2006
From: Georgetown, KY, USA
Status: offline 		anyone ran it though? think im gunna pick up a bottle


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       Post #: 210

RE: Changes? - 7/26/2006 3:58:18 AM   
captinjohn


 

Posts: 5309
Joined: 1/25/2002
From: Hesperia, MI, USA
Status: offline 		Back to post #204 Have you checked to see if the compression is the same on both cylinders. With a compression gauge. Good luck capt,n

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RE: Changes? - 8/30/2006 1:35:34 AM   
hpi apollo



Posts: 2639
Joined: 5/13/2006
From: Georgetown, KY, USA
Status: offline 		has anyone here used VP Racing RC3 castor oil? if so how does it stack up to some Klotz BeNOL? thanks


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       Post #: 212

RE: Changes? - 10/28/2006 6:14:31 PM   
s7jstep1



Posts: 2003
Joined: 2/20/2006
From: red bluff, CA, USA
Status: offline 		i dont know if this question has been answered already but, is it okay to switch from one brand of nitro fuel to another? i bought a used revo and he was using 20% blue thunder by dynamite, would it be okay to switch to traxxas top fuel 20%?

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RE: Changes? - 10/29/2006 3:09:40 AM   
downunder



Posts: 3012
Joined: 10/10/2002
From: Adelaide, AUSTRALIA
Status: offline 		It's quite OK to switch between brands or nitro percent or whatever you like but you must retune and it's wise to open the needle a little to ensure it's a bit too rich before the first start on a new fuel (especially when going to a higher nitro mix).

(in reply to s7jstep1)
       Post #: 214

RE: Rc Fuel Faq - 11/14/2006 1:13:34 PM   
speedster 1919



Posts: 1462
Joined: 12/17/2004
From: Martinsville, IN, USA
Status: offline 		Just like any inline air cooled engine. Cool air passes around front cylinder and then the warmed up air has to pass over rear cylinder hence rear is hotter. Just like a Harley V-Twin going down the road the rear cylinder is always hotter and suffers from more wear and tear. The number 3 cylinder on VW bug just about always goes bad first since air is blocked by oil cooler and the air that gets to that cylinder is much hotter after going thur oil cooler.

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       Post #: 215

RE: Rc Fuel Faq - 12/2/2006 11:55:37 AM