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).
Parts list and instructions for modifying the switchbox to isolate the ignition on 20/25 HP and Peregrine II models.
| Identifier | ExFiles\Box 166\3\ img004 | |
| Date | 26th October 1932 | |
| RHC.{R. H. Coverley - Production Engineer} HS.{Lord Ernest Hives - Chair}/Wst. X6069 BY/RD3/W.26-10-32. 20/25 H.P., and "Peregrine II". "20/25 H.P. Switchbox for Three Rate Charge, L.O.P. D.53718. Six Sets. "Peregrine II" Switchbox for Three Rate Charge, L.O.P. D.100349. Three Sets. Will you please put in hand the following parts to enable the above Switchboxes to be modified so that we can isolate the ignition :- STANDARD PARTS :- D.50372 - Bush. 2 off. D.70530 - Brush Packing. 2 off. D.70531 - Brush Packing. 1 off. D.73240 - Brush Separator,R.H. 1 off. D.73237 - Brush Stamping. 10 off. D.73238 - ditto- 5 off. NEW PARTS (Prints of which are attached) :- D.53906 - Terminal Post. 1 off. D.53907 - Brush Stamping. 10 off. D.53911 - Contact Maker,R.H. 1 off. D.70533 - Contact Plate,R.H. 1 off. D.72517 - Screw. 1 off. The Brushes should be assembled in accordance with L- D.53908 - Brush Assembly. 1 off. D.53909 - Brush Assembly. 1 off. D.53910 - Brush Assembly. 2 off. The "Nos.off" are per Switchbox and the modification is in accordance with "D" Scheme 588. We are following this with out Alteration 3812/D.to Switch Body,D.53711,to make this revision possible. BY/RD. | ||