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 difficulties of bench testing Lucas dynamos and a proposal for a more suitable test rig.
| Identifier | ExFiles\Box 36\4\ scan 026 | |
| Date | 12th May 1920 | |
| To Ry. from EFC. X.3014. EFC3/T12.5.20 c. to Hy{Tom Haldenby - Plant Engineer} c. to EP.{G. Eric Platford - Chief Quality Engineer} c. to Sft.{Mr Swift} c. to Wor{Arthur Wormald - General Works Manager}/Mr. Peskett. X.1627 - RE TESTING OF LUCAS DYNAMOS X.3014. ---- We have now tried on our bench the suitability of testing a standard Lucas E.575 dynamo by driving it from another similar machine with a pulley ratio as used on the car, but we do not find this to be a satisfactory scheme, as the voltage really required for this job would be in the neighbourhood of 50 with a considerable available current. The noise made by the other machine is also a disadvantage. We have also tried in a similar way a small 100 volt motor handed to us for the purpose, but we find that this particular motor is particularly bad for noise and therefore would mask the effect we are looking out for. This is not the only reason against the use of this motor, another reason being that the motor is rather small and does not comfortably perform the work of driving the dynamo. We suggest that what is really required is a comparatively large motor say not less than 4 H.P. which could run comparatively slowly and silently and do all the work required with ease. It would then be necessary to apply the power to the chassis in such a way that the standard dynamo drive from gear box to dynamo is made use of. Contd. R.R. 199 (250) (SD676 19-7-17) MP 18086 | ||