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I think Velco is right. I have moved the power train from my Angel 50 into my Wind 50. Hacker A5016S / Rhino 5000 6S. The Wind 50 has more fuselage volume than the Angel 50 and I am changing from a 16x10 on the Angel to a 17x8 on the Wind 50 which should give lower airspeed but more pull. Plesae let us know how 5S works but prepare to be dissapointed.[

] I think I would buy a couple of 6S packs before changing the motor as Velco suggests.
John