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).
Standardisation of a Dynamo Cut-out with Double Contacts to reduce volt-drop and overheating.
| Identifier | ExFiles\Box 168a\3\ img337 | |
| Date | 15th January 1937 | |
| COMPLETED 1.2.37. 25/30 H.P. STANDARDISATION of PARTS Description of Parts. DYNAMO CUT-OUT WITH DOUBLE CONTACTS TO R.R.SCH.549 & SPRINGS D.54809. Origin. To reduce volt-drop and overheating of cut-out. Report of Experimental Test. With ventilated dynamos heavy currents can be taken without distress but it is neccessary to fit double contacts on the cut-out to deal with the extra load. Three cut-outs modified have run :- 14,000 miles on Ph.III chassis 32-EX. 13,000 " " " 36-EX. COST TABLE: Cost of Old Part: MATERIAL £- s.1 d.1, LABOUR £- s.7 d.{John DeLooze - Company Secretary}-, CHARGES £- s.10 d.{John DeLooze - Company Secretary}-, TOTAL £- s.2 d.8 Cost of New Part: MATERIAL £- s.2 d.7, LABOUR £- s.8 d.{John DeLooze - Company Secretary}-, CHARGES £- s.1 d.2, TOTAL £- s.4 d.5 Nett Increase: £- s.1 d.9 Signature from Cost Dept. that above is correct. G A L 11.1.37. APPROVALS: INITIAL | DATE | REMARKS SG.{Arthur F. Sidgreaves - MD} | 29-1-37 | Agreed SG{Arthur F. Sidgreaves - MD} WGR. Hs.{Lord Ernest Hives - Chair} | | Agreed Hs.{Lord Ernest Hives - Chair} C. | 18.1.37. | Agreed C. E.{Mr Elliott - Chief Engineer} | 19.1.37. | Agreed E.{Mr Elliott - Chief Engineer} DA.{Bernard Day - Chassis Design} | 16.1.37. | Agreed Da.{Bernard Day - Chassis Design} By.{R.W. Bailey - Chief Engineer} | 18.1.37. | Agreed By.{R.W. Bailey - Chief Engineer} E.P. | 16.1.36. | Agreed EP.{G. Eric Platford - Chief Quality Engineer} Failure on 21-G-IV rather shows this necessary. Suggest fix above to try out. SFT.{Mr Swift} | 16.1.37. | Agreed Sft.{Mr Swift} MX.{John H Maddocks - Chief Proving Officer} | 16.1.37. | Agreed Mx.{John H Maddocks - Chief Proving Officer} Hs.{Lord Ernest Hives - Chair} Rm{William Robotham - Chief Engineer} | | RHC.{R. H. Coverley - Production Engineer} | 23.1.37. | Agreed RHC.{R. H. Coverley - Production Engineer} | ||