Hi M61hops, The ones I am thinkig of are the CAV type where the whole armature moves forward into the field and rotates as the starter is energised, these have a spring pre-loaded pinion on a helix which eases it into mesh, another spring returns the armature when de-energised. I am familiar with the inertia types as I have a couple on ST1s , this type used to be very popular over here in the 60s and 70s.
Beer as a cold starting aid?
Did no one tell you? Its got to be blended whiskey as a minimum
Mark.