From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Query about whether an increase in a starter motor's torque has resulted in increased current draw.
| Identifier | ExFiles\Box 62\1\ scan0078 | |
| Date | 12th November 1932 | |
| XG134 S/W. Hs{Lord Ernest Hives - Chair}/Wst...from PN.{Mr Northey} Copy to R.{Sir Henry Royce} Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} E.{Mr Elliott - Chief Engineer} Da.{Bernard Day - Chassis Design} By.{R.W. Bailey - Chief Engineer} Hdy.{William Hardy} PN.{Mr Northey}6/WT1.11.32. New Peregrine Starter Motor. Reverting to your Hs{Lord Ernest Hives - Chair}/Wst.5/KT.22.10.32 it is very interesting to note that you have been able considerably to improve the torque by reducing the armature turns and increasing thereby the cross-section of the armature teeth. What I should like to know however is whether this increase of torque has been gained at the expense of much additional current, and if so to what extent. The point becomes material of course for winter work. [STAMP: RECEIVED NOV 12 1932] PN.{Mr Northey} | ||