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).
Preliminary examination report on a Bosch Type FU6R magneto, comparing it with existing standards.
| Identifier | WestWitteringFiles\R\2October1927-November-1927\ 73 | |
| Date | 12th November 1927 | |
| To R.{Sir Henry Royce} from EFC. c. BJ. E.{Mr Elliott - Chief Engineer} c. Da.{Bernard Day - Chassis Design} BY.{R.W. Bailey - Chief Engineer} c. Wor.{Arthur Wormald - General Works Manager} EFC/G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 12.11.27. R.BOSCH TYPE FU6R MAGNETO No. 31859. X4568 Following your R2/M12.9.27, we duly obtained a Bosch type FU6 magneto (particulars of the relative prices of which as compared with our standard were reported to you in our EFC1/T13.6.27). (1) The weight of this machine is 11.25 lbs., as compared with our present standard of 13.5 lbs. and the Watford sleeveless, type EW6, 12.0 lbs. The results of the preliminary examination of this magneto are contained in the following items from my assistant's report :- (2) (a) The body of the magneto comprising the armature tunnel, distributor gear case, and end bearing housing is one casting of aluminium, the long H.T. collector brush being screwed into position direct from the outside. (b) The distributor is a beautifully finished rubber base moulding of the jump spark pattern (a new departure for Bosch) and the rotor is fitted with a trailing brush. (c) Bekelite distributor gear wheel and steel armature pinion. (d) Only one oilway. (e) Domed platinum points. (f) Light rocker arm with spring buffer. (g) Rather short cams, (not flat) apparently let into the brass cam ring. All component parts are well finished off and the attention to detail work is characteristically Bosch. (3) H.T. safety gap unobtainable. (4) Primary point gap as received .014". Contd. | ||