COOLING AND PERFORMANCE CHARACTERISTICS OF THE XM-551 ARMORED RECONNAISSANCE AIRBORNE ASSAULT VEHICLE
Abstract
An investigation was conducted to determine the performance and cooling characteristics of the XM-551 vehicle at 115 F. High ambient performance and cooling tests were conducted at full rack, 3rd driving range with a 3-5 mph headwind. Maximum observed sprocket horsepower was 182 at 2797 rpm engine speed with transmission in 3rd driving range lockup. The vehicle at full-fuel rack cooled at 115 F with the transmission in third driving range at all design operating speeds. The coolant thermostat was blocked open and the fan automatic speed control re moved. The highest lockup temperatures were obtained at an engine speed of 2798 rpm. Engine sump oil, coolant leaving the engine, and oil leaving the transmission were 254, 197 and 235 F at 115 F ambient. The highest converter temperatures were observed at the lowest converter ratio. At a converter speed ratio of 0.56, engine sump oil, coolant leaving the engine, and oil leaving the transmission were 255, 207 and 262 F at 116 F ambient.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1963
- Accession Number
- AD0406944
Entities
People
- Arthur L. Jaeger
Organizations
- United States Army Tank Automotive Research, Development and Engineering Center