OK - we know that the engine makers HP numbers are not real world. But I would guess that a motor claiming 2 HP and a motor claiming 1 HP, by the same manufacturer, the numbers would be relative. That is, the 2 HP would have twice the power of the 1 HP motor. An OS .46 AX claims 1.7 HP at 16,000 rpm. An OS .65 LA claims 1.7 HP at 16,000 rpm. The .46 also weighs 6 oz. less.
The Hobbistar comes with .65 LA - weight 7-8 lbs.
That being said let, me get to the question. If I put a .46 AX on a Hobbistar with a smaller gas tank and the motor being lighter, would it have the same or similar performance as with the .65 LA? ( yes it would need to be rebalanced )
On a side note the tower trainer 60 says use a .46 to .61 engine - weight 7.5 lbs.