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Saturday 7/7/18

2018-07-07, 21:07 by Gary M Jones

I was at the field today between 14:00 & 15:00 all on my own , good flying too. There is a dead sheep along the fence line towards the gate from the pits, I saw the farmer so reported this to her. I hope no one had plans for a BBQ Smile .

Farmer …

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Post by Stubbsy on 2011-08-06, 12:21

Anyone know anything about ABC engines? - Iv never heard of them before!

Namely a SC 61 A-S ABC AERO engine!
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Post by Peter Squire on 2011-08-06, 12:47

Most 2stroke glow engines are ABC ben, Aluminum piston, a Bronze cylinder sleeve, and Chrome plating on the cylinder sleeve.

Some are also ringed i.e JEN 57

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Post by Guest on 2011-08-06, 12:50

Aluminiun, Brass, Chrome. Ally piston(high silicon content) with no ring, brass liner with a chrome plating for hard wear resistant surface. On turning over cold should be a slight 'nip' at top dead centre. When running, liner expands slightly more than pistion to give a good gas tight fit with minimum friction.
HTH

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Post by Brian Colclough on 2011-08-06, 12:57

Ben ABC is a generic term for glow engine with a slight taper to the bore, with the bore slightly tighter at the top. There is no piston ring, the terminology is "A" for aluminium piston which runs in a "B" brass "C" chromed bore although of late a lot of the bores are not chromed but chemically sprayed with Nikasil. When a new ABC engine is purchased a definite tight spot is felt at TDC, this tight spot lessens as the engine runs in but remains to a lesser degree for the life of the engine, if said tight spot disappears totally it usually indicates a worn out engine. Wink

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Post by Stubbsy on 2011-08-06, 13:13

Right chaps got it - Thanks for that!
By my logic then, the above engine is now manufactured by SC? is that right? Anyone know anything about SC engines?
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Post by Andy Sayle on 2011-08-06, 16:40

The one and only glow engine I have ever owned was an SC engIne. When it ran, it worked okay, but I found it needed a lot of fettling an adjusting the carb between flying sessions to keep it happy. I'm sure that was probably me being thick (and annoyed, I hate engines...) but you never know.

Anyway, do the right thing and go electric...

Andy

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Post by Guest on 2011-08-06, 16:57

Ben I've got an ASP61 from Just Engines.Its only had a tank of fuel thru it if your looking for a 61.

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Post by Brian Colclough on 2011-08-06, 19:13

A lot of the early cloned Chinese engines S.C and ASP etc suffered from poorly fabricated carburettors which as a consequence made the engines hard to tune compared to the Japanese O.S. engines from which they were cloned however of late our Chinese friends seem to have sorted this issue and the engines are far easier to set up and tune and are now a good and economical alternative to the said O.S's of this world. So Ben unless you're looking at a very early S.C. you should be OK Wink

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Post by Tim on 2011-08-06, 19:42

My SC.91 4T runs very well, when I can be bothered to go messy.

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