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).
Blueprint of a servo operating lever assembly and dog development.
| Identifier | ExFiles\Box 41\1\ Scan106 | |
| Date | 20th October 1929 | |
| A-14285 SERVO OPERATING LEVER ASSEMBLY. DEVELOPMENT OF DOGS ON MEAN DIAMETER (1.150 DIA) LEAD 6.7387 HELIX ANGLE ON MEAN DIA. = 61°-48'10" A-14287 A-14286 G-72478 A-9467 A-14288 A-12343 A-11594 G-74783 A-14289 .2414 .5144 .250 .275 .9032" 6 7/16" C.R.R. 20.10.29 E.R. | ||