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).
Modifications for a Large Spectre Oil Pump and referencing a Smaller Water Pump.
| Identifier | ExFiles\Box 149\2\ scan0100 | |
| Date | 9th March 1935 | |
| SECRET. X1265 Swindall To BY.{R.W. Bailey - Chief Engineer} from E/JNR.{Charles L. Jenner} E/JNR.{Charles L. Jenner}1/HP.9.3.35. c. Wors. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} RHC.{R. H. Coverley - Production Engineer} Large SpectreCodename for Phantom III Oil Pump. Please receive herewith:- Lec.4400 shewing the above. The pump has been increased in capacity 50% which makes it 61% larger than Phantom. The pitch of the gears are altered from 12 DP. to 9 DP. to avoid making the unit bulky, and to maintain the ground clearance at this point. An adjustable restriction is placed in the suction pipe to prevent high oil pressure reading when the oil iscold. Smaller E/JNR.{Charles L. Jenner} Lec.4400 herewith. Water Pump ? | ||