Accession Number:

ADA048580

Title:

Limitations of the CH-47 Helicopter in Performing Terrain Flying with External Loads

Descriptive Note:

Final rept. Jul 1976-Apr 1977

Corporate Author:

BOEING VERTOL CO PHILADELPHIA PA

Report Date:

1977-08-01

Pagination or Media Count:

161.0

Abstract:

Quantitative limitations of the CH-47 helicopter performing terrain flying with external loads have been developed using a fully coupled total force and moment simulation math model of the helicopter and external load. Load sway motion and susceptibility to pilot induced oscillations in nightinstrument meteorological conditions were identified as the prime source of these limitations. Masking considerations were determined for various external load configurations, including an 8x8x20-foot MILVAN and a 155mm howitzer. Incorporation of load stabilization AAELSS, coupled with a shortened sling suspension or a Self-Hoisting Cargo Interface Device, offers the best potential for alleviating the limits identified, while providing improved masking requirements and reductions in pilot workload. In addition, the levels of maneuverability possible with the present state-of-the-art visionic systems including FLIR and NVG were defined for terrain flying during night operations.

Subject Categories:

  • Military Aircraft Operations
  • Attack and Fighter Aircraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE