Experiments with Track Ventilation for Amphibious Tracked Vehicles and With Track Covers and Retraction

Abstract : An experimental model investigation of the effects of local pressurized captive air bubbles in the track wells of an amphibious vehicle is reported. In addition, the effects of track retraction and of track covers are documented. The track ventilation does not reduce the calm water drag, however, track retraction and the use of track covers can reduce the total drag by 40% at typical operating speeds.