I ran mine with the 450 for a while. I used an APC 11x4.7SF prop. It was nice, but the flight times where too short with my 1320's(7-8 minutes). I switched over to the 400 outrunner 920kv version and I'm much happier now with the flight times(around 13-15 minutes of 3D flight).

Marks90004,

Yes, this plane does have issues in KE just like the larger Ultimates. However it is a joy in other aspects of 3D flight which makes me not really mind the bad KE.

Chris