40,000-POUND-CAPACITY HEAVY-LIFT HELICOPTER EXTERNAL CARGO HANDLING SYSTEM DESIGN STUDY
Abstract
The purpose of this program was to design a helicopter hoist system capable of lifting 40,000 pounds. Desired features of the hoist system included a weight limitation of 4,000 pounds and the ability to provide either a 1- and 2-point load suspension system or a 1- and 4-point load suspension system. Major areas of investigation included a study of primary tension members; the relative advantages of multi-drum and single-drum hoist systems; single wrap and overlaying of cables on hoist drums; and the desirability of including vibration isolation components between the external load and the helicopter. Through study and tests, it was determined that it was possible to provide a combined system which permits 1-, 2-, and 4-point load suspension. This feature is achieved by use of a single cable drum winding four separate cables. Varying the method of reeving the cables permits the selection of either a 1-, 2-, or 4- point load suspension system. Load attitude and cable loading may be adjusted by means of four hydraulic control cylinders included in the system. Using a single drum with four cables eliminates the complex synchronization problems associated with a multi-drum drive system.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1968
- Accession Number
- AD0671674
Entities
People
- Barron W. Mouring
- Fred J. Fisch
- Hans D. Heyck
- Richard L. Jarvis
- Robert V. Patterson
Organizations
- AAI Corporation