Assertion: airfoil's lift | /r/CreatedBy | helicopter blades
Facets:
Source sentences:
text: Since the major part of the lift produced by helicopter blades is at the outer third of the blade length by reason of the greater swept circular area and higher blade velocity thereat, the under-surface step can be terminated as desired by gradual merging with the blade at an intermediate point as indicated by dotted lines 88 in FIG.