Heavy Lift Helicopter - Prototype Technical Summary

This report summarizes the Heavy Lift Helicopter HLH Prototype program. The program was designed to demonstrate, in the actual flight environment, the capabilities of HLH components previously developed by Boeing Vertol under the Advanced Technology Components ATC effort. Design, fabrication, and assembly of one prototype HLH was 90 percent completed. An advanced aluminum honeycomb airframe, landing gear, and subsystems not included in the ATC effort were designed and fabricated. Limited laboratory tests were conducted to assure airworthiness of the prototype aircraft. Mockups were constructed of the crew compartment and aft area. A description of the aircraft, discussion of the tests conducted, and weight and performance data are presented. A list of references containing detailed documentation of the program is appended.