What engine would you recommend for a CG Ultimate?
I fly my Ultimate with a ST2300 and a quiet tuned pipe. 16x8 apc prop. This combo will pull the Ultimate out of a hover with authority!
I also have another Ultimate with an OS160, slimeline smoke muffler, TME smoke pump, 16x8 apc prop. It will be finished in a week or two.
I also had an Ultimate with a ST90, 14x6 MS prop, it could hover but would not pull out vertical.
Go with a 140, 160 2-stroke!