Matthew Bond's Semroc Heli-Roctor
Manufacturer:Semroc

Helicopter recovery model that releases the blades after boost by using the motor ejection charge to drop the fin can off the back attached to a Kevlar harness, eliminating the need for a burn string.  Blade shape no is accomplished by slicing the balsa blades diagonally lengthwise (partially, not a complete cut-through) then bending the balsa with the aid of pre-cut jigs and glueing the cuts to set the final shape.

 

Flights

 

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