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sc46a Best fuel?

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scott finnie24/12/2014 18:34:30
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I'm wandering what is the best fuel for a brand new sc46a? Going to take a leap back into ic flying. I miss the smell and the noise, the thumbling with mixtures and the general delight of it all. I've a new trainer somewhere which I shall use. I've some old tornado fuel. But would rather treat it nicely,


Scott
Percy Verance24/12/2014 18:45:20
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Hi Scott

I'd personally go with a fuel containing 5% nitro, 15% synthetic oil and 2% castor. A small nip of castor never hurt an engine and will offer protection against a lean run on a hot day (remember those?). The old aircraft at the Shuttleworth Collection have managed very nicely on castor for decades.......

 

Edited By Percy Verance on 24/12/2014 18:46:44

Stevo24/12/2014 18:53:20
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Irvine contest 10...

Done me proud on all my old SC two and four strokes... Saitos and lasers!!

Lee Smalley24/12/2014 23:25:35
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Any well recognised fuel will do, 5% nitro no more any more is a waste of money, for no real performance, and go synthetic, as for that old chestnut of castor protecting against a lean hot run, please... Most mordern synthetic oils these days wipe the floor with castor at high temps and will protect your engine way better than castor, the only reason to use castor is the smell which is glorious!! I use Weston liquid gold 5% and have done for many years 2st and 4st
Ian Jones25/12/2014 00:42:48
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Posted by Lee Smalley on 24/12/2014 23:25:35:
Any well recognised fuel will do, 5% nitro no more any more is a waste of money, for no real performance, and go synthetic, as for that old chestnut of castor protecting against a lean hot run, please... Most mordern synthetic oils these days wipe the floor with castor at high temps and will protect your engine way better than castor, the only reason to use castor is the smell which is glorious!! I use Weston liquid gold 5% and have done for many years 2st and 4st

That's the one for me two thumbs up

iqon25/12/2014 00:54:53
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10% Bekra. best fuel by far.....at least its the best in the local shop...

Peter Miller25/12/2014 08:44:16
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Posted by Stevo on 24/12/2014 18:53:20:

Irvine contest 10...

Done me proud on all my old SC two and four strokes... Saitos and lasers!!

I use this on everything now. No pfoblems and works well.

Bob Cotsford25/12/2014 09:16:23
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5% nitro of whatever brand is easily available - as has been said preferably fully synthetic or no more than 2% castor.

Percy Verance25/12/2014 10:40:50
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That's it Bob, just a bit of castor for insurance. yes (sorry Lee, old habits etc)

The benefit of fuel containing over 5% nitro in general sports engines is somewhat debatable........

 

Edited By Percy Verance on 25/12/2014 10:44:04

Lee Smalley25/12/2014 22:33:22
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Nowt wrong with that Percy, I think what you find is that people get settled on a fuel, and they tend to stick with it to save them re-tuning everything, personally it make me laugh when I hear of them spending nearly 20quid on a bottle of fuel, good fuel it may be, but 20quid holy moly, Weston UK 5% delivered to your door 45quid for 4 bottles, and its great stuff, many years ago when synthetic oils were starting out, they were not as good as they are now and some castor was left in as a safe guard nowadays it is not required synthetics really are that good, still its a personal choice, pick a good fuel, one you can easily get, and stick to it, again no real reason to use 10% nitro, but if it works don't fix it

Edited By Lee Smalley on 25/12/2014 22:33:56

Percy Verance25/12/2014 22:53:45
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Lee

I've stuck with Southern Modelcraft fuel for 20+ years now, and I'm happy with it. As you're no doubt aware, it's only possible to obtain SM fuel from them at shows. I guess if I did ever run out I'd have to consider mail order fuel from Weston UK. However, I don't like buying fuel without knowing what it's formulation is.......

I'd happily agree regarding nitro Lee. You have to use at least 10% in Saitos (I have several), but anything else seems happy on 5%.

Lee Smalley26/12/2014 00:18:03
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Yeah I really liked southern MC fuel however getting hold of it is a pain in the butt, I easily go through 12 to 16 bottles of the stuff in a season and I ain't buying that much in one go, as for Weston not publishing the contents, I don't really give two hoots, better flyers than me use it on some very expensive engines so that's good enough for me, I also have Moki engines which will not run well on any nitro, that's even cheaper
cymaz26/12/2014 08:38:47
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Pro synth or model technics will do well. However I'm sure engines don't like swapping fuel for some reason. So if you find a reliable supply of either then stick with it.

I use Pro synth. Even though the oil content is not revealed by the company, I've never had a problem with it and there always seems a nice clean oily residue from the exhaust. It doesn't gum up the engine and (go on laugh if you must) when the engine is running correctly there is a sweet nutty smell to the smoke.

Percy Verance26/12/2014 09:08:37
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A nutty smell? Well that's certainly different cymaz.

I always quite liked the aroma of Model Technics Irvine Sport fuel, although I haven't used it for years now. Someone suggested the aroma might come from the Klotz oil, but I've no idea if that's true.

Lee

10 to 15 gallons would also be what I'd use if we had a good season. It might sound a lot, but it isn't really. Going back 20 odd years, we used to have Kevin Caton ( the top F3a flyer) often practising on our field, as his own club's site wasn't perhaps the best at that time. It gave us spectators an insight into the competitive world of top aerobatic flying. Even back then Kevin mentioned that he'd typically use around £800 worth of fuel during practice sessions....... and that all the servos in his models would be swapped out after 25 to 30 flights, to avoid any loss of control accuracy due to gear wear.......

It's tough at the top.

 

Edited By Percy Verance on 26/12/2014 09:12:44

cymaz26/12/2014 09:15:05
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There must be a point at which the mixture, engine set up is just right optimising the fuel burn.

Or do I need to go and see nurse again...face 21

Percy Verance26/12/2014 09:24:37
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There probably is a point at which the mixture is just right, optimising the fuel burn cymaz. Trouble is, some folk spend too much time trying to find it when they could be flying.......

Nurse, the screens please!...............er, what's that nutty smell?

..26/12/2014 09:29:22
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Posted by Peter Miller on 25/12/2014 08:44:16:
Posted by Stevo on 24/12/2014 18:53:20:

Irvine contest 10...

Done me proud on all my old SC two and four strokes... Saitos and lasers!!

I use this on everything now. No pfoblems and works well.

Yes another vote for this from me, I run all my engines (2 & 4 stroke) on this.

Percy Verance26/12/2014 09:48:49
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A bit too pricey for me Justin, but I'm a tight git. I even took the bulb out of our fridge to save electricity........

Paul Marsh26/12/2014 09:53:04
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Sport 5% is good enough.

..26/12/2014 09:56:53
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Posted by Percy Verance on 26/12/2014 09:48:49:

A bit too pricey for me Justin, but I'm a tight git. I even took the bulb out of our fridge to save electricity........

smiley

 

Yes I know what your saying Percy, I have to drive a fair old way to get mine now so am considering a move to Westons fuel as they will courier 4 one gallon bottles foc. 

Edited By Justin K. on 26/12/2014 10:04:13

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