UH-1N Category II Climatic Laboratory Tests.
Abstract
The UH-1N was evaluated at extreme temperatures in the Eglin AFB Climatic Laboratory to identify problems likely to occur in arctic and desert regions of deployment. The UH-1N and its subsystems operated satisfactorily in the laboratory environment from 110 degrees F to -55 degrees F. Major problem areas consisted of severe engine oil leakage at -65 degrees F and 90-degree gearbox oil leakage at 125 degrees F. Except for these leaks and a leak in one stabilizer bar viscous damper, the materials used to seal lubricants and working fluids were adequate; particularly in the hydraulic system where no leakage occurred at any test temperatures. The capability for self-contained starts as stated in the UH-1N Detail Specification was considered marginal at or below 0 degrees F and did not exist at -25 degrees F. The bleed air heater did not maintain the 40 degree F mean temperature specified in the UH-1N Detail Specification; however, the cabin was comfortable at -55 degrees F outside temperature. In general, the XM-94 weapon system operation was satisfactory at all low temperatures tested, including -65 degrees F. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1971
- Accession Number
- AD0891288
Entities
People
- Gary L. Nelsen
- James A. Ford
Organizations
- Air Force Test Center