RCU Forums - View Single Post - Pusher Prop Thrust Line Offset from Datum Line
Old 10-06-2011, 06:20 PM
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SeamusG
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Default RE: Pusher Prop Thrust Line Offset from Datum Line

Uh, this IS the small model - 3rd gen in fact. The 1st two - may they RIP. Trust me - I am NOT the wizard behind the curtain. Just might be the builder of the next iteration though. The latest "maiden" failed during take off. I was not present but am sharing what I was told. The roll out was nice-n-smooth. Lift off was gradual. Up elevator gave a nice gradual climb rate. More up elevator and then, after climbing to about 40', the craft abruptly nosed over - full throttle - into a vertical down line and stopped when it met with the concrete runway. Thinking that a combination of added pitch adjustment with building thrust just may have been toooooo much. [:@]

Thus my question about the effect of the thrust line well above the datum line. Had to smile with rmh's comments ...

Hey - it's just a hobby - isn't it?