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Old 11-03-2010 | 01:37 AM
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mike109
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From: Dubbo, New South Wales, AUSTRALIA
Default RE: How to make an MDS 46 throttle.

G'day

I have no idea why the original carby did not work well. Probably because I don't know how to set it up. I tried all the usual things I know but if I leaned the bottom end enough to stop the over rich mid range it would not idle and accelerate.

It is the sweetest idling engine I have ever come across. It is also relatively quiet. The top end does seem a bit limited but I am not after power but rather reliability. Currently it is wearing an APC 11 x 6 and the fuel I used has 10% nitro, 5% castor, 15% Klotz 200 and 70% methanol. The engine has had very little use and has excellent compression and smooth bearings.

It is not my engine. A friend was given it by his brother who bought it some years ago. We put it in his Kadet Senior and managed to fly it several times but it was not nice to use although it never did stop. Kadets like to fly at about half throttle and if flown like this, the engine would gradually load up so that when some acceleration was asked for, it would splutter and cough until it managed to clear its self. It would then accelerate to full power.

The owner wanted to put it in an ARF Cessna but I would not have trusted it in its former tune. In the Kadet this really did not matter as Kadets really are gliders and are easy to handle if they dead stick.

Anyway, we are happy with the engine in its current form. It will do the job and appears to be reliable. And for scale models, that really is what matters.

Cheers

Mike in Oz