ORIGINAL: Sport_Pilot
I have said for years that the .65 Sportster would be the ideal inexpenive engine for a Senior Telemaster or Senior Kadet.
Way too large for a Senior Kadet. I thought a TT .46 was too much power. I had that engine pointing down at what looked like a 30 degree angle down before it would stop climbing straight up on full power.
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I have flown a friend's Kadet Senior that had ailerons added and most of the dihedral removed. It was powered by a K&B .65 Sportster and was not over powered at all, surprisingly enough. Yes, downthrust is needed with any flat bottomed airfoil equipped model that hasn't had a bit of positive incidence added to the horizontal stabilizer, ala the Goldberg J-3 Cub.