HIGH PERFORMANCE TANDEM HELICOPTER STUDY. VOLUME 1. SUMMARY REPORT
Abstract
A preliminary design study was conducted to establish a tandem helicopter configuration capable of the following minimum performance: (1) 1600 nautical miles ferry range at zero headwind with 1 hour fuel reserve, (2) 200 mph speed with a minimum payload of 800 pounds, and (3) flying qualities to meet MIL-H-8501. Aerodynamic parametric studies and basic design layouts indicated that configurations derived from either the Boeing-Vertol 107 series or YHC-1B (Chinook) series could meet or exceed these performance requirements. Both blade radius and chord must be increased slightly, for either series, to insure that the ratio of payload to empty weight is maintained in going to the high performance configuration. Drag reduction and reduced blade loading were required to meet the range and speed requirements, but the installed power was not increased. It was concluded that either the advanced 107 or advanced YHC-1B were capable of the performance requirements and could be used to demonstrate the feasibility of high performance.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1961
- Accession Number
- AD0257642
Entities
Organizations
- Boeing Rotorcraft Systems