Product Improvement Test of T53-L-11 Engine in the UH-1D Helicopter
Abstract
As a result of the unsatisfactory performance of certain T53-L-11 engine components, the USAAVNTBD was requested to conduct a product improvement test of improved components on a T53-L-11 engine installed in a UH-1D Helicopter during the period June 1964 to December 1965. The test was terminated at the end of 941 hours of operation owing to damage resulting from failure of a bearing not being tested. It was concluded that the product-improvement items found suitable as replacements for the standard items in the T53-L-11 engine are the combustor deflector, gas-produced turbine wheel, exhaust diffuser, power turbine nozzle, and asbestos air seal; that other samples of the combustor liner mounting system should be tested to analyze further the cause of the one bracket failure; that the suitability of the product-improvement main-shaft carbon seal, No. 2 and No. 3 main-shaft bearings, and power turbine wheel cannot be determined because of damage sustained when the No. 4 bearing failed; and that the suitability of the design to air-seal segments to keep walnut-shell compound from lodging between segments cannot be determined because the engine was not cleaned with the walnut-shell compound. It is recommended that the product- improvement combustor deflector, gas-producer turbine wheel stainless-steel exhaust diffuser, power turbine nozzle, and asbestos air seal be adopted as standard and incorporated in the T53-L-11 engines during production or overhaul; that additional samples of the product-improvement main-shaft carbon seal, combustor liner mounting system, No. 2 and No. 3 main-shaft bearings, and power turbine wheel be subjected to a 1200-hour test.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 05, 1966
- Accession Number
- ADA030921
Entities
People
- Clyde H. Davis
- F. J. Mccrory