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

Two flights by the 18“ rubber-powered Koolhoven FK-55 by Tom Hallman. The model has contra-rotating props via a Contra-Rotating Prop Drive unit (CRPD) designed by Keith Sterner, who can be contacted at fyteraces@. 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 free-flight rubber-powered models,