Russian Lorry With Variable Tyre Inflation

A 41-TONNER with six-wheel drive has been produced in the U.S.S.R. Known as the Z1L-157, it has single wheels with 12.00-18-in. tyres and provision for tyre deflation and......

Hydraulic Fan Reduces Power Wastage

DOWER absorption by the fan of a conventional cooling system represents a relatively high proportion of engine output when the unit is operating under light load. Some form of......

Synchronized Vacuum Trailer Braking

B ECAUSE of the inherent delay in applying brakes on a trailer or semitrailer with simple vacuum-servo systems, there is still a possibility of jack-knifing during heavy......