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Which Fuel?

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Dai Fledermaus05/08/2013 10:27:58
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As someone who has returned to the fold, I'm a bit bemused by the range of glow fuel now available. I need to run in my Enya ss30 fitted with a No3 plug. The operating instructions suggest the following ratio of fuel components:- Methyl alcolol 70 - 80%, Nitro methane 0 - 10%, Castor or synthetic oil 20%. I've looked at the Model Technics list of glow fuels and none of then seem to meet this specification. Have I missed something or am I just being dim?

Ernie05/08/2013 10:59:38
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Hi Colin, This is one of these questions that you just don't want to ask, 'cos you will get a million different answers. So, heres my tuppenceworth. Nitro certainly gives a bit more power (if you really need it) I use about 5% because it also helps starting. Oils nowadays are mostly synthetic, so I'd stick with that. Castor leaves a sticky residue, and can easily burn onto your lovely new Enya. BUT, it smells fantastic. Just engines (who are very very good) recommend 18-20% synthetic, with 2% castor and 5% nitro, but it's a hot potato ernie

Martin Harris05/08/2013 10:59:38
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If it says 5 or 10% nitro-methane it should be OK - 10% Duraglow might be the most appropriate but you could call Steve Webb models for confirmation (they're the Enya distributor).

Most fuels on the Model Technics site come in a range of nitro contents...

Edited By Martin Harris on 05/08/2013 11:01:16

GONZO05/08/2013 11:23:08
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The Enya SS30 came with either a lapped cast iron piston and liner or a ringed piston; a plain bearing main shaft or a ball raced main shaft. If your SS30 is the one with the lapped cast iron piston then it requires a castor oil based fuel as these piston/liner combinations were designed for this, not like the more modern ABC piston/liner combo. 10% nitro would be plenty. Engine test **LINK**

The standard silencer is restrictive and not very quite. It is possible to put a larger silencer on with positive results.

HTH

Forgot to say, if it is the lapped cast iron piston version, run it in as you would a diesel.

Edited By GONZO on 05/08/2013 11:27:28

Steve Hargreaves - Moderator05/08/2013 11:34:58
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The best fuel IMHO Colin is one you can get hold of easily......swapping fuels regularly is a recipe for deadsticks & general unreliability as you will probably need to re-tune your engine to suit the new fuel.

So find a fuel you can get hold of consistently...personally I think synthetic oils are better than castor oil so I prefer these types....spend some time setting your engine up correctly & then leave it alone.

I like & use Southern Modelcraft Mo-Glow fuel.....the 5% nitro version. I use this in all my engines 2 & 4 stroke 0.32cu in & up....they run great & the fuel is pretty cheap at £13 a gallon or so.....the only problem is that you can only buy it at the shows...dont know

Some useful info here too.....

GONZO05/08/2013 12:11:51
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You may be interested in this short thread on the performance with a larger silencer **LINK**

Dai Fledermaus06/08/2013 09:22:01
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Thanks everyone, I appreciate your help

Dai Fledermaus06/08/2013 15:28:54
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In case anyone else is interested, I received this very helpfull email in reply to an enquiry I sent Model Technics yesterday. Hi Colin
Thanks for your email. Given the specification I would suggest the GN10 or GX10 which
are fuels with 20% Castor and 10% Nitromethane, the rest being methanol.
The engine will also be happy on Duraglow10 which is a mix of 9%EDL (synthetic oil) and
6%castor, 10% nitromethane the rest being methanol.
Hope this helps
Yours John

Edited By Colin Ashman on 06/08/2013 15:29:36

Lee Smalley06/08/2013 16:03:56
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i run everything i own on weston liquid gold o% nitro or 5% nitro, never have a problem from 0.25 to Moki 180 2 and four stroke

Lee Smalley06/08/2013 16:04:55
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ps listen to mr hargreaves!!! as well

Jon Laughton06/08/2013 20:29:28
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I was addicted to model technics fuel but had the odd problem. On advice from a very seasoned professional flyer I switched to Westons 10% and have not looked back! You can order 4x gallon or half gallons on line at very reasonable prices.....

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