Results 261 to 270 of about 189,174 (279)
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Helicopter

2004
The invention relates to a helicopter provided with a rotor with at least one rotor blade (5), wherein drive means are provided for actively moving the or each rotor blade up and down during rotation of the rotor, in particular about a flapping hinge (8) thereof, so that moments, applied by the rotor to the fuselage (1) are prevented.
openaire   +1 more source

Helicopter

1969
John Jewkes   +2 more
openaire   +1 more source

Helicopter

2021
Bottasso, Luigi   +6 more
openaire   +1 more source

Helicopters

Scientific American, 1940
openaire   +1 more source

Helicopters

Scientific American, 1955
openaire   +1 more source

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