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Stop on the Mat!
Page 67
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MAKING distance from 25 m.p.h. 1.) of under 6 ft., which represents approximately 3.5g.I It sounds fantastic, but this is the claim made for the Plasswilm Stop, which originated in Germany and will be sold in this country through A-One Motors (London), Ltd., Belgrave Road, London, S.W.I. The brake is designed for lorries or coaches and consists of a chain mat which is carried in a swinging bin fitted in front of each wheel.
It is brought into action by a lever in the cab, and when the control is released the mat drops in front of the rear wheel which moves on to it. It has been tried in Germany and Belgium, where the appliance was said to have stopped a 15-ton lorry in under 6 ft. from 25 m.p.h., without locking wheels, and on an ice-covered road the stopping distance was 10 ft. from the same speed.
The weight of the chains and bins for a three-tonner is approximately cwt. and 2i cwt. for a 5-ton vehicle. It is questionable whether operators or manufacturers of the 30 m.p.h.-class vehicle will be willing to add the weight of this equipment to a lorry which is near the border line. For the heavier vehicles, it is recommended to have a set of chains behind as well as in front of the axle to prevent the vehicle from rolling back when starting off on an For a 12-15-ton machine this would add approximately 6 cwt. to the unladen weight. Whether this method of emergency slopping would be permitted by the authorities in this country is debatable.