Improved Parachute-type Stopping.
NTIS: PB/274-401 Available for Reference At Bureau Libraries :41 pages
An improved parachute-type stopping for changing the course of mine ventilation air during emergencies was developed for the Bureau of Mines. The stopping can be quickly deployed by one person from a single attachment point and provides excellent stopping performance with the flow in the design direction. Adding pin and foam attachments between its skirt and the passageway surfaces improves its performance with flow in the design direction and maintains the stopping with zero or reverse air flows. Stopping performance results for a range of airway sizes including 7.5 By 10 feet simulated airway with pressure differentials of up to 3 inches of water are presented. Predicted performance values for this stopping design for larger passageways are also presented.
CP; Final Contract Report;
NTIS Accession No.
NTIS: PB/274-401 Available for Reference At Bureau Libraries
Goodyear Aerospace Corp.