CGM Ultimate engine - big mistake?
At the moment I have an OS120SP powering the Ultimate. It is 166 mm long with the special OS mount. The only option was to put the battery as far as possible back. The first engine + mount were only 115 mm long.
The engine power is not so important, as long as it stays running. I have seen some death sticks (I experienced only one) and one thing is for sure, the Ultimate is not a very good glider.
Bye,
Vincent