Factors A Ecting Accurate Control

By J. PICKLES, A. M.I. M ech. E. p REVENTION of roll is one of the most important considerations in vehicle design. Roll is the angular displacement of the vehicle centre line......

An All-electric Mobile Crane

ECENTLY introduced by Cromp ton Parkinson, Ltd., Astor House, Aldwych, W.C.2, and C. H. Johnson (Machinery), Ltd., the 10-cwt. Mynne electric runabout crane has been developed......