Resistance to motion of the APT (IM-APT-271)

Following Internal Memorandum IM/APT/263 - APT Hill Climbing -a further appraisal is being made of the APT performance. In this note consideration is given to "mechanical resistance" of trains, in an attempt to determine whether the figure of .02 N/kg (4.5 lb/ton) assumed for the APT is justified. ...