Preliminary resonance testing of the Brecknell - Willis high speed pantograph (IM-DA-282)

This pantograph has been designed as a replacement for the Dynamics Section's first Experimental Pantograph. It is the result of a collaboration between the Dynamics Section and Brecknell-Willis and Co. of Chard, Somerset. The Dynamics Section designed or specified the suspension systems, which were grafted onto the Brecknell-Willis designed...