First flight of the VFW H3

Description

This was the E1 prototype ('E' denoted Entwicklungs-Modell or “development, or research, model”). The aircraft had a compressed air driven main rotor and 2 ducted propellers for forward propulsion.

Source: "Hybrid Helicopters: Compounding the Quest for Speed, "Raymond L. Robb, VERTIFLITE Summer 2006, Page 34