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).
The experimental bench tests of a U.S.A. Bosch Magneto, type D.U.Z.6.
| Identifier | ExFiles\Box 49\5\ Scan229 | |
| Date | 4th May 1921 | |
| X4285 EFC {E. Fowler Clarke - Electrical Engineer} 4/T4.5.21. R.R. 552A (100 T) S.H. 793. 10-12-20) G. {Mr Griffiths - Chief Accountant / Mr Gnapp} 2047 To R & E. {Mr Elliott - Chief Engineer} from EFC. {E. Fowler Clarke - Electrical Engineer} c. CJ & PN. {Mr Northey} c. Da. {Bernard Day - Chassis Design} & EP. {G. Eric Platford - Chief Quality Engineer} c. By. {R.W. Bailey - Chief Engineer} & Bn. {W.O. Bentley / Mr Barrington} c. EWT. for R.R.Inc. X.4285 U.S.A. BOSCH MAGNETO TYPE D.U.Z.6. Report on Experimental Bench Tests. Two of the above magnetos were received at these works from America, having been brought over by Mr. Hives. on his return. A short preliminary report was sent under cover of our EFC {E. Fowler Clarke - Electrical Engineer} 6/T15.4.21. Mention was made in that report of the fact that the method of lubricating the distributor gear wheel bearing in the Z.R.6 was absent from this machine. Later in going through its experimental tests it failed on the short endurance test (see test No.7 below) on account of this bearing. Also we have a communication to hand, Cy2/G4.3.21 which confirms and explains our experience. This is to the effect that the D.U.Z.6 magneto was fitted with an oilless bushing in the distributor spindle, but the American Bosch Co. having their doubt about it, have cancelled it in favour of the method used on the Z.R.6. The armature bearings, however, are still not provided with oilways. This magneto has now been put through our experimental bench tests with the following results :- Magneto No.3363370. (1) Weight 14.4 lbs. This is less than that of the U.S.A. Bosch Z.R.6 by .7 lb. Contd. | ||