Helicopter built by Nederlandse Helicopter Industrie, Rotterdam, designed to reduce cost per flying hour; tip mounted ramjets, having no moving parts, eliminate complicated piston engines, clutches and transmissions; use of "selfadjusting" rotor results in excellent flight characteristics; construction and cost problems; flight characteristics; utilization of helicopter.
Two-engine ramjet-helicopter "Kolibrie"
Ingenieur
Ingenieur ; 68 , n 35
1956
Article (Journal)
English
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