Accession Number:

AD0775897

Title:

Test Results Report and Technology Development Report, HLH/ATC Drive System Aft Rotor Shaft Bearing Test

Descriptive Note:

Final rept. Sep 1971-Mar 1973

Corporate Author:

BOEING VERTOL CO PHILADELPHIA PA

Personal Author(s):

Report Date:

1974-01-01

Pagination or Media Count:

87.0

Abstract:

The report presents the results of a program to define criteria and to design, fabricate, and test simulated HLH aft rotor shaft tapered roller bearings. Tests were performed in a back-to-back test rig which simulated the expected loading, lubrication, housing stiffness, and preload of the HLH aft rotor shaft application. Technical test inspection and evaluation were used to determine bearing performance and adequacy of bearing fatigue life under predicted operating conditions. Trade studies conducted of the HLH aft rotor shaft support bearing show that large-pitch-diameter and high-contact-angle duplex tapered roller bearings provide the most effective method of reacting the HLH rotor loads. This bearing configuration resulted in the lightest weight and most compact bearing system for the HLH aft rotor shaft bearing application.

Subject Categories:

  • Helicopters
  • Machinery and Tools

Distribution Statement:

APPROVED FOR PUBLIC RELEASE