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).
Order and specification details for electrical equipment for the experimental Goshawk 11 chassis.
| Identifier | ExFiles\Box 51\2\ Scan041 | |
| Date | 10th November 1921 | |
| Wd. {Mr Wood / Mr Whitehead} from HY {Tom Haldenby - Plant Engineer} /C. c. to Depts. c. EFC. {E. Fowler Clarke - Electrical Engineer} X. 4338. BY {R.W. Bailey - Chief Engineer} /C8/P10.11.21. [Stamp:] RECEIVED 11 NOV X. 4338. GOSHAWK 11. ELECTRICAL EQUIPMENT. To enable the five experimental production Goshawk 11. chassis to be completed by the Works, it has been decided that the following electrical equipment shall be ordered as soon as possible:- 3 Lucas Type E.5.R.R. Dynamos, of the single field winding 3rd brush controlled type, similar to the sample machine recently supplied to us and in accordance with our drawing number D.50202, blueprint of which was sent to Messrs. Lucas in connection with the first Dynamo ordered, excepting that the terminal connections should be arranged differently and in accordance with instructions given to Messrs. Lucas by our Mr Clarke. These should be supplied as insulated machines, as we can quite readily earth one of the terminals to the carcase at our own convenience. 3 Lucas 4 1/2" diameter Starter Motors, similar to sample machines recently supplied to us, but to be arranged with one terminal earthed to the carcase so as to be suitable for our earthed wiring system. The Armature Shafts, Driving End Brackets, Bearing Plates and Pinions, will be provided by R.R. in the same way as we did for the first motor, but in the case of these three machines we have made some alterations to the end bearing brackets, as per drawing No.D.50253 DC. blueprint of which we enclose, from which it will be seen that the bracket is secured to the carcase by eight 3 BA. fitted studs instead of six 2 BA. also that the bore of the carcase is to be increased to 4.000" diameter. In addition, the depth of spigot has been increased from .150" to .200". Messrs. Lucas should confirm that that can arrange the Starter Motors in question to suit these alterations and that the deeper spigot will not foul the field winding. We also enclose blueprint of D.50464, showing outline arrangement of the Starter Motor complete with driving shaft. 3 Lucas Starter Switches H.S.1. similar to the sample recently submitted. 3 Lucas Switch Boxes, complete with cut-out, also with R.R. modifications as recently standardised for | ||