Assertion: flipper's portion | /r/CapableOf | conserve an angle of attack
Facets:
Source sentences:
text: 2, the second curve 3, arranged at the end is adapted to make it possible for the second portion of the flipper to conserve an angle of attack which is as close as possible to the axis of the leg of the swimmer during the propulsive effort exerted by the swimmer.
text: The foot flipper of the invention is designed such that the fin of the flipper assumes a position such that it extends in the direction of the tibia of the swimmer so as to make it possible for the second portion of the flipper to conserve the angle of attack so that it corresponds as closely as possible to the axis of the leg of the swimmer.