Got Simprops Dornier 328 Turboprop. Tried to fly it with 2-Grumpner speed 480 bb's on 6.5x4 props. The current drain was over 60amps using 8x2000 cells. This is not normal or is it? Got about 2 1/2 minutes of fast flight then an abrupt stop then an abrupt crash. Any ideas??
Ron S.

Thats about the right time(2.5 mins) for max power batteries must have beenRED hot
Joe

sounds like to high amperage, consumptions of battery, distruction of motor and the no battery left for the radio. Mercy!

High amperage you bet. But why? These are two brand new Graupner Speed 480 BB Speed motors in parallel using a 8-2000 pack swinging 2-aeronaut carbon 6.5X4 props. Maybe these 480's are not meant for for high loading 6.5x4(props). I dunno!
Thanks

Can't really say but I had an AP29L that burnt up on about the same set up. It only took 2 minutes of flying and the back housing was melted plastic.