03/05/2023
3 May 1956, first flight of the little H-3 "Hummingbird". As one of the few designs where the rotor blades are driven by tip jets instead of an engine and transmission.
NHi-H3 Kolibrie Helicopter
Today, 3 May 1956, the NHI H-3 Kolibrie (Dutch for “hummingbird”) helicopter, developed by Nederlandse Helikopter Industrie made its first flight. The H-3 was a two-seater general purpose helicopter with a duraluminum tube superstructure, an open cockpit and an undergear of metal skids. This ultra-light helicopter was powered by tip-jets – two ramjets, one at the tip of each rotor blade. The ramjets could burn multiple types of fuel, giving the helicopter some versatility. Variants of the H-3 came with skis, flotation devices and medical evacuation stretchers were developed and tested, but these versions were never produced. After developing a crop duster version, the H-3 was mainly marketed for that purpose.
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