Arne Bitstad, Hans Gjengedal et son 

CTSW équipé de skis rétractables DATUM

 
Bitstad's CTSW - with pilot on wheel skis


 
Bitstad's CTSW - installing wheel skis 
 
 
 
Bitstad's CTSW - installation of wheel skis
 
Bitstad's CTSW - nose ski
 
Bitstad's CTSW - wheel skis on the mains
Bitstad's CTSW - discussing wheel skis Bitstad's CTSW - happy pilot with his wheel skis