Heh, for the kind of munging around with profile stunters that I'm doing at present, I wouldn't dare run a Rothwell. A cheap-as-chips Marz or a plain bearing PAW is much more suitable, as are 2nd hand OS MAX or Enya 15s. Contact with the (muddy) ground is inevitable - I worry about the open front bearing on the Marz for that matter.

Col

No, neither a Rustler nor a CS, but an interesting motor though. Back in the late 80's a fellow called Andrew Kennedy here in Australia decided to try selling Tiger replicas. He had his own Tiger (a Mk2 - I understand that the CS Tiger is a Mk3) copied and replicas produced from it in China, and then sold them around the place. Eventually he got out of the business, as people were buying directly from the Chinese and he was effectively being cut out of the process. Whether this all eventually turned into the CS business I don't know - I'm not aware of the history of the CS motors.

I contacted Andrew - he told me that the engine is of good quality and of equivalent performance to the original Tiger, although in his opinion the Chinese ballrace is a bit ordinary and can be replaced by something better. In any case, it's a really nice motor to start and run, and spins a 9x4 about 1200 rpm faster than my healthy PAW 15DS. A Rothwell or original Tiger is no doubt a cut above it, but it'll do fine for what I need it for.

Cheers
Steve

Can one use ether instead of Nitro in glo fuel ? If so what are the advantages and disadvantages ? This is for flying model planes !!!

I've never heard of this mate. Ether in diesels is used to provide the initial fire to get the motor running. Additional power in diesels is obtained by using more kerosene (roughly the equivalent of nitro).

Is there a problem getting nitro in SA? Ether can be a bit of a problem.

Some folks substitute nitromethane for acetone. It's a matter of trying small fuel batches to see what percentage works for you.

Yes, some people use ether in glow fuel and even gasoline fuel for racing engines. Ether has a wide range of air fuel ratio at which it is ignitable so it will broaden the needle. It however can be used in very small percentages in glow or spark ignition before it starts causing detonation. In general I would not recommend it, unless you have a lot of experience with engines.

Acetone is not a substitute for nitromethane. Acetone appears to improve the tuning characteristics of glow engines when there is no nitro in the fuel. I have not tried it myself.