Accession Number:

ADA243536

Title:

Analysis of Rotorwash Effects in Helicopter Mishaps

Descriptive Note:

Final rept.

Corporate Author:

SYSTEMS CONTROL TECHNOLOGY INC ARLINGTON VA

Personal Author(s):

Report Date:

1991-05-01

Pagination or Media Count:

59.0

Abstract:

A selected number of rotorwash related helicopter mishaps have been reviewed and analyzed. This analysis attempts to determine threshold levels of rotorwash velocity that result in potential hazards. Due to a lack of detailed mishap information being available, critical threshold values of velocity could not be conclusively identified. However, critical ranges of combined rotorwash and ambient wind velocity were identified for several types of investigated mishaps. These ranges of peak velocity generally occur between approximately 30 and 40 knots. Recommendations are provided for improvement of the rotorwash mishap reporting system and for the acquisition of experimentally obtained data which will significantly aid any future rotorwash related mishap analysis efforts.

Subject Categories:

  • Helicopters
  • Terminal Flight Facilities
  • Safety Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE