..."Here our gang getswiped out by a helicopter... 
Victor Rousseau 「Astounding Stories of Super-Science January 1930」
..."Suicideclub, aimin' for our helicopter...
Victor Rousseau 「Astounding Stories of Super-Science January 1930」
...The helicopter props spun around...
Various 「Astounding Stories, February, 1931」
...Satisfied,he cut the Rahl-Diesels, gunned the helicopter props and droppedlightly down on the stubbly field of Sola Ranch...
Various 「Astounding Stories, February, 1931」
...It was a small affair with stubbywings above which were two helicopter blades revolving at high speed...
Various 「Astounding Stories, February, 1931」
...The helicopter paid no attention to them for amoment, and then came a puff of smoke from its side...
Various 「Astounding Stories, February, 1931」
...It was above the helicopter, andthe shell which missed its mark plunged to the ground...
Various 「Astounding Stories, February, 1931」
...Highabove, the helicopter had ceased climbing and hovered motionless...
Various 「Astounding Stories, February, 1931」
...Asthe plane fired, the helicopter shot forward like an arrow from a bow,and thereby spelled its doom...
Various 「Astounding Stories, February, 1931」
...They would halt at intervals, to allow helicopter tenders tocome up to transfer descending passengers...
Various 「Astounding Stories, June, 1931」
...It opened its helicopter wings and drifted downward...
Various 「Astounding Stories of Super-Science, November, 1930」
...Itssilvery aura deserted it and the vessel was revealed as a sleek,tapered cylinder with no wings, rudders or helicopter screws...
Various 「Astounding Stories of Super-Science, November, 1930」
...He threw on the helicopter switchand the plane rose swiftly into the air,the myriad other flying craft whichwere circling nearby keeping at a safedistance from it...
Various 「Astounding Stories of Super-Science, March 1930」
...He twirled the helicopter starter, and she roared and zoomed, takingan angle of a hundred and twenty-five degrees upward off a runway oftwenty yards...
Various 「Astounding Stories of Super-Science, October, 1930」
...He released the helicopter lever and opened throttle wide...
Various 「Astounding Stories of Super-Science, October, 1930」
...I heard the helicopter engines thumping...
Various 「Astounding Stories of Super-Science, October, 1930」
...And one of the biggest of the aircraft camegingerly up to the very inner edge of the lattice-work of fog and hungmotionless, holding itself aloft by powerful helicopter screws...
William Fitzgerald Jenkins 「Invasion」
...The droning hum of the helicopter came across the broken ground...
William Fitzgerald Jenkins 「Invasion」
...The speaker in the helicopter boomed above their heads...
William Fitzgerald Jenkins 「Invasion」
...With a purring noise the helicopter shot upward...
Murray Leinster 「Morale」
..."Now shoot the works," said the helicopter man evenly...
Murray Leinster 「Morale」
...The helicopter went down like a stone...
Murray Leinster 「Morale」
...Then there were whipping,lashing branches closing swiftly all around the helicopter...
Murray Leinster 「Morale」
..."Hullo," said the helicopter man in a dreary levity, "there's a portablevision set in this car...
Murray Leinster 「Morale」
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