Well that's another high KV motor... almost of the same rating!

You could merely try the PROP they recomend for that motor instead of replacing the motor, as you are using pretty much the same thing.

I don't know how you plane on mounting that outrunner.

Remember: Lower KV motors produce LESS RPM but can utilize larger PROPS for more THRUST.

HIGHER KV motors produce HIGH RPM's but cannot use larger PROPS, you must use smaller props with a bit higher pitch for more "pitch speed".

Pitch speed meens the airflow coming off the prop is faster ( usually resulting in faster flight - IF - there is enough thrust to get the plane moving ).

It's all a balancing act... You need sufficient thrust and enough pitch speed so as not to stall the plane in flight.

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Your Hawk was flying just above stall speed.

The ailerons were not effective.

The dihedral of the wing and wing tips overcame any attempt at rolling the plane.

To make the ailerons effective you will have to fly the plane faster, by fixing the motor/power problem.