Accession Number:

ADA030682

Title:

CH-47C Vulnerability Reduction Modification Program - Fly-by-Wire Backup Demonstration

Descriptive Note:

Final rept. Jul 1975-Mar 1976

Corporate Author:

BOEING VERTOL CO PHILADELPHIA PA

Personal Author(s):

Report Date:

1976-08-01

Pagination or Media Count:

157.0

Abstract:

The purpose of the work performed was to accomplish a laboratory demonstration of a fly-by-wire FBW backup flight control system for application to the CH-47C helicopter. Tests, evaluations, and an analysis were conducted to determine the feasibility of using an electrical linkage as a backup to the existing mechanical flight control system. Of primary concern was the interfacing technique between the two systems, which was to result in no degradation of control system performance during normal operation and which would permit safe operation of the aircraft in the event of a failure in either the mechanical or the FBW backup system. The program was performed in four tasks. Task I involved the definition of a FBW backup system based on use of HLH ATC components suitable to demonstrate concept feasibility on the Boeing Iron Bird flight control test rig. Task II involved the modification and installation of the system on the test rig with the actual testing and performance evaluation being conducted during Task III. Task IV effort involved the reassessment of effects analysis conducted under Contract DAAJ02-74-C-0052.

Subject Categories:

  • Helicopters
  • Electrical and Electronic Equipment

Distribution Statement:

APPROVED FOR PUBLIC RELEASE