Accession Number:

ADA008995

Title:

Fabricated Helicopter Transmission Housing Analysis

Descriptive Note:

Final rept. 18 Dec 1972-18 Oct 1973

Corporate Author:

UNITED TECHNOLOGIES CORP STRATFORD CT SIKORSKY AIRCRAFT DIV

Personal Author(s):

• Korzun, Alexander
• Schuman, Stephen

Report Date:

1975-01-01

Pagination or Media Count:

298.0

Abstract:

The helicopter transmission housing study provides a transmission housing design superior to the conventional magnesium cast housing. The new design is a welded steel fabricated truss-like structure, corrosion resistant, and not susceptible to creep. The aircraft selected for this study was the U.S. Army CH-54B helicopter. The new fabricated truss-like housing was designed to be interchangeable with the present CH-54B magnesium main transmission housing. It meets all the interface and functional requirements of the cast housing design. Loads for flight and crash conditions, as well as stiffness criteria, were developed to permit structural analysis and comparison with the existing casting design.

Descriptors:

• *TRANSMISSION GEARS
• *HELICOPTERS
• *HOUSINGS
• *ARMY AIRCRAFT
• MAINTAINABILITY
• RELIABILITY
• CORROSION RESISTANCE
• AERODYNAMIC LOADING
• CREEP
• TITANIUM
• TRUSSES
• THERMAL STRESSES
• WELDMENTS
• STEEL
• JET ENGINES
• STRUCTURAL PROPERTIES
• STIFFNESS

Subject Categories:

• Helicopters
• Mechanics
• Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE