Old 11-19-2009, 11:46 PM
  #67  
quorneng
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Location: Cheshire, UK
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That's one advantage of going lighter. A reasonable thrust, say 18 ounces, gives near vertical performance but at a torque that the WD can easily handle.
It also helps to use a relatively fine pitch prop. It gives good climb thrust but it falls off quite quickly as the speed builds up so helping to keep things under control.

This is my lightweight, hand launch, 17 ounce version with differential ailerons, no rudder, the elevator servo in the fin and flaps.

A simpler wing without flaps and the weight falls below 16 ounces.
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