tianci... the raven from global is aaaaa... beautiful plane to fly...i am the guy you mention that bought the second raven from hobby tech.i don't understand why some say its easy to snap...and hard to taxi...mine was ok....take off beautifully.by the way where do you fly often?.my first raven run on a os 52 four stroke...i agree that thru your calculation the plane is slow.any [ i stall my first raven after a loop.....i order one more from awie the moment i crashed it.one lesson is this is a very precision plane.timing is very important when you recovering it after snap roll , loop , stall turn etc.....it tends to stall very easily.....about the speed....i don't know much about wing loading and calculations theory....the second one i had i run with a os50fx and hope to get more speed...not much diffrent....so how much are you planning o sell yours?.....let me know cause i really love this plane...by the way i have some plane to trade ...are you interested?.........