Adjective
not having or using power
Source: WordNetan autogiro is supported in flight by unpowered rotating wings Source: Internet
According to the RAF museum, 48 aircraft were captured intact and 24 were shipped to the United Kingdom for evaluation, although only one, VF241, was test flown (unpowered). Source: Internet
Apart from take-off and landing the rotor may be unpowered and autorotate. Source: Internet
Autogyros have unpowered rotors, with a separate power plant to provide thrust. Source: Internet
Commercial horse-drawn canal boats could be seen on the UK's canals until as late as the 1950s, although by then diesel-powered boats, often towing a second unpowered boat, had become standard. Source: Internet
DMUs may have better acceleration capabilities, with more power-driven axles, making them more suitable for routes with frequent closely spaced stops, as compared with conventional locomotive and unpowered carriage setups. Source: Internet