Long life `super tippers for quarrywork
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• Three 'super' tippers, specially designed to outlive conventional types in the bodybreaking stone carrying business, have been built for ECC Quarries Ltd by E. M. Wilcox Ltd, Peterborough.
The extra-heavy-duty 30-ton-gross vehicles operate from ECC's Croft quarries near Leicester, carrying payloads of over 20 tons of Sin. stone. The body strength to cater, long term, for such loads was achieved without varying Wilcox's standard monocoque body design. The specification was simply raised to include crossmembers at 20m. pitch instead of 24in., 6in. deep pressed channel top rails, 4in. plate flooring and din. plate sides. Two integral 10in. deep main runners were added, not for body strength considerations, but to accommodate the underfloor tipping gear.
By building the whole body and subframe assembly in aluminium, the extra strength requirement was satisfied for an unladen vehicle weight of only 9.5 tons.
Motive units for the tippers are glassfibre-cabbed Foden 8XB6/30 chassis; double-drive, eight-wheeled, units with a 20ft 8fin. wheelbase. They are equipped with side-mounted F.10 tipping gear and stabilizer. Internal dimensions of the bodies are: length, 20ft 6in.; width, 7ft 7n.; fixed sides, 3ft 3in. high; headboard, 5ft high, with flanged spillboard.
Wilcox designed, built, tested and commissioned the three tippers within five weeks of receiving the order.