Acquisitions: January 1 - March 31, 1962

The Air Cushion Performance of a Tracked Hovercraft in a Tunnel

“…From the transportation economics standpoint it is desirable for the total installed power to be no greater than that required to give the stipulated vehicle performance. For diesel and gas turbine powered versions of the tracked hovercraft Bliss (5) states that the maximum propulsive power would be 10% greater than that required at the vehicle design cruise speed. Therefore, taking n = l T and d=12 ft, clearance between tunnel wall and vehicle= 18 in (therefore a = 0 -8 ) ; taking 6^=0-15, 1 / O = 4 0 0 ft/sec and L=5000 ft, tunnel relative roughness=0-008.…”