Why are helicopters so expensive? Part 4.
Askue
Vaughan
V
Sikorsky Aircraft Corp, Stratford, Conn., USA. vaskue@sikorsky.com
D017732:Air Ambulances / Q000191:economics*; D001359:Aviation / Q000295:instrumentation; D002568:Certification; D003365:Costs and Cost Analysis; D004638:Emergency Treatment / Q000295:instrumentation; D006077:Government Agencies; D006801:Humans; D007221:Industry / Q000191:economics*; D014481:United States