The Bölkow Bo 102 Helitrainer was an unusual ground-based helicopter training aid that was developed and built by Bölkow of West Germany in the late-1950s. Designed to be mounted on a swivelling captive rig[1] the Bo 102 allowed trainee pilots to practise procedures such as engine starting, rotor engagement and manipulation of the flight controls. Many of the Bo 102's components, including the single-bladedfibre-glass main rotor were used in the company's next design, the Bo 103.
