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).
Sketch of modifications to water holes on PIII cylinder heads to improve coolant circulation.
| Identifier | ExFiles\Box 93\4\ scan0037 | |
| Date | 27th June 1936 | |
| SKETCH OF MODIFICATIONS TO WATER HOLES ON PIII CYL HEADS TO IMPROVE COOLANT CIRCULATION REAR END EXHAUST SIDE INLET SIDE FRONT END A .3125 DIA. ALL HOLES SHOWN TO BE LEFT OPEN AND OF SAME SIZE AS STD HEAD EXCEPT THOSE MARKED 'A'. HOLES MARKED 'A' TO BE REDUCED AS SHOWN. ALL OTHER WATER HOLES TO BE BLANKED OFF. b. S. Steadman 8/6/36 ROLLS-ROYCE LTD. PRINT ROOM 27 JUN 1936 DERBY. RM.{William Robotham - Chief Engineer}168 | ||