Accession Number:

AD0784593

Title:

HLH/ATC Engine Shaft Support Bearing Development Program

Descriptive Note:

Final test results and technology development repts.

Corporate Author:

BOEING VERTOL CO PHILADELPHIA PA

Personal Author(s):

Report Date:

1974-05-01

Pagination or Media Count:

122.0

Abstract:

Drive shafting which transmits power between combining transmission and engines is supported by ball bearings to structure. Because of the difficulty of providing fluid lubrication to these bearings, they have always been lubricated with grease. Present experience with the CH-46 and CH-47 helicopters has shown that these bearings will perform adequately with grease lubrication at DN operating speeds of 450,000. The HLH drive system will use a similar bearing configuration to support both the synchronizing shafts and the engine shafts. Because of the increased speed requirements for a grease- lubricated ball bearing, a test program was conducted to determine the operating characteristics, design modifications and maximum regreasing interval for a ball bearing operating at the maximum loads and speed of the HLH engine and synchronizing shaft support bearing.

Subject Categories:

  • Helicopters
  • Machinery and Tools

Distribution Statement:

APPROVED FOR PUBLIC RELEASE