Accession Number:

AD0730362

Title:

Stability and Control of Helicopters in Steep Approaches. Volume 3. Derivatives and Transfer Functions for the YHC-1A Tandem-Rotor Helicopter and the S-58 Single-Rotor Helicopter

Descriptive Note:

Final rept.

Corporate Author:

MECHANICS RESEARCH INC LOS ANGELES CA

Personal Author(s):

• Wolkovitch, Julian
• Hoffman, John A.

Report Date:

1971-05-01

Pagination or Media Count:

304.0

Abstract:

Derivatives and transfer functions are presented for the Boeing- Vertol YHC-1A tandem-rotor helicopter and for the Sikorsky S-58 single-rotor helicopter. The flight conditions considered for the YHC-1A include forward speeds from 0 to 80 knots and descent rates from 0 to 25 fps. For the S-58 forward speeds of 0 to 100 knots and descent rates of 0 to 22.5 fps are considered.

Descriptors:

• *FLIGHT PATHS
• *HELICOPTER ROTORS
• FLUID DYNAMICS
• STABILITY
• TRANSFER FUNCTIONS

Subject Categories:

• Military Aircraft Operations
• Helicopters

Distribution Statement:

APPROVED FOR PUBLIC RELEASE