The report describes the requirements, purpose and operational characteristics of a helicopter sling.
DA Approved Small Development Requirement for a Family of External Helicopter Slings, 5,000 to 60,000 Pound Capacity
1975
17 pages
Report
No indication
English
60,000-lbs. Capacity stock car
Engineering Index Backfile | 1902
60,000 lbs. capacity coal cars
Engineering Index Backfile | 1888
New 60,000-pound coal cars -- Lake shore and Michigan southern railway
Engineering Index Backfile | 1898