Accession Number:

ADA801491

Title:

Flight Tests of the Sikorsky HNS-1 (Army YR-4B) Helicopter. 1 - Experimental Data on Level-Flight Performance with Original Rotor Blades

Personal Author(s):

Corporate Author:

NATIONAL ADVISORY COMMITTEE FOR AERONAUTICS LANGLEY FIELD VA LANGLEY AERONAUTICAL LABORATORY

Report Date:

1945-03-01

Abstract:

Level flight performance measurements were made on the TR-4B helicopter with the original set of main-rotor blades and a gross weight of approximately 2560 pounds. The minimum shaft power required by the main rotor at cruising rpm 225 rotor rpm, 2100 engine rpm was approximately 99 hp at a speed of 40 mph. The shaft power absorbed by the tail rotor at cruising rpm was approximately 3 to 4 hp over a range of speeds from 25 to 80 mph.

Descriptive Note:

Wartime rept.

Pages:

0040

Identifiers:

Communities Of Interest:

Distribution Statement:

Approved for public release; distribution is unlimited. Document partially illegible.

File Size:

11.31MB