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).
Continued list of specifications for various component parts and settings.
| Identifier | WestWitteringFiles\T\2January1929-June1929\ Scan175 | |
| Date | 13th March 1929 guessed | |
| -2- Contd. with .012 final air gap and .175 distance short of full armature pole piece register when in fully engaged position. (4) 18 S.W.G. teazer winding of 36 turns. (5) Damper to LeC. design allowing .175 travel, tge damper piston to function as the armature stop both ways. (6) Damper piston springs of rating as original design but of .175 greater free length. (7) .030" air release hole through piston. (8) Armature travel relative to damper piston of .600 or total of .775. (9) Main armature spring 2 of long low rate as asked for in our FFC6/T1.2.29, giving 5.75 lbw. in initially set up position of 3.775 length. (10) Einion clearance from wheel in dis-engaged position to be .175 and set up of pinion spring reduced to a nearly zero value. WFC. | ||