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).
Secret memo describing the screw gear for a drum winding carriage on a launching winch.
| Identifier | ExFiles\Box 175\2\ img145 | |
| Date | 10th July 1941 | |
| S E C R E T. To Rm.{William Robotham - Chief Engineer} from Ev{Ivan Evernden - coachwork}/DB.{Donald Bastow - Suspensions} C. [REDACTED] C. [REDACTED] 3006 Ev{Ivan Evernden - coachwork}/DB.{Donald Bastow - Suspensions}17/SW.10.7.41. Launching Winch. Screw Gear for Drum Winding Carriage. FL.514, the original of which is attached to Rm{William Robotham - Chief Engineer}/HH's copy, shows the screw gear for the drum winding carriage. This consists of a double (i.e. right and left hand) threaded bar with the two threads joined by a connecting curve at each end. The bar is driven by chain from the drum shaft, the ratio being such that the drum makes 81 turns for the full traverse of the slipper follower from one end to the other of the thread. Ev{Ivan Evernden - coachwork}/DB.{Donald Bastow - Suspensions} [Signature] Original to Rm{William Robotham - Chief Engineer}/HH. Prints to Rm{William Robotham - Chief Engineer}/HH. Ev.{Ivan Evernden - coachwork} & Ashby. | ||