18 Rubber Powered Contra Rotating Koolhoven FK 55 Semi Start to Finish

Two flights by the 18 rubberpowered Koolhoven FK55 by Tom Hallman. The model has contrarotating props via a ContraRotating Prop Drive unit (CRPD) designed by Keith Sterner, who can be contacted at Place CRPD in the subject line. A limited number of units are available. Model is loosely based on this 1937 plan article from Model Airplane News: Music: Loveable by For more info on freeflight rubberpowered models,