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).
Failure of dynamos on 20/25HP tank engines.
| Identifier | ExFiles\Box 168a\3\ img177 | |
| Date | 22th March 1935 | |
| WST L603? Ax/abm13/T25.3.35. RE. 20/25HP TANK ENGINE DYNAMOS. X/1441/HP22.3.35. We have looked through our correspondence and also made enquiries from Lewis, but except for the following information which has already been given to you in our memo Mx{John H Maddocks - Chief Proving Officer}/Sks20/T26.2.35, we have no other record of the failure of dynamos. An extract from our memo above referred to reads as follows, against which we have added marginal notes as shown:- As this trouble has) "The Experimental Establishment have had only occurred on ) "some trouble with dynamos on the Mark III Exp.Mark III tanks ) "tanks, some of the armatures have burnt it appears to be a ) "out and the solder on the commutators fault in wiring ) "melted. The wiring scheme on the Mark III circuit. The matter) "tank is different from that on the Mark II.A is having invest- ) "and Mark II.B. tanks." igation. ) As indicated this trouble was not experienced on the standard tanks but on some Mark III Experimental Tanks. However, in order that you can question Lewis further on this matter, we are asking him to see you personally on the subject. | ||