<span class="Apple-style-span" style="font-family: Verdana, Arial, Helvetica, sans-serif; background-color: rgb(238, 238, 238); "><div>Hi,</div><div>I am scatch building a 3 channel Keil Kraft Super 60</div><div>Can some one please tell me the most suitable size engine to use 2 stroke or 4 stroke?</div><div>Thanks Ian</div></span>

I have a real nice Kraft 61 that would  be neat on there.  Let me know if you are interested.

The recommended engine size for a Keil Kraft Super 60 was 2.5-5cc according to the advert on the back of my July 1964 edition of the Aeromodeller, so a 15-29 two stroke.

If you were planning to fit a four-stroke, I would be inclined to try an OS 40 but the new 30 sized SC four-strokes should fit the bill.

I intend to build one of these over the winter.

The person who suggested a Kraft 61 was either joking or does not know what a Keil Kraft Super 60 is!
The Super 60 is a very old trainer and a favorite in England in years gone by, it suits much smaller engines in the .30 range. Might be worth considering electric too.
This same question was posed on the ModelFlying site and had a number of interesting replies see http://www.modelflying.co.uk/forums/...s.asp?th=55526