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).
Technical drawing of a piston for a car engine.
| Identifier | ExFiles\Box 77\1\ scan0031 | |
| Date | 4th March 1919 | |
| NUMBERS OF LETTERS PATENT U.K. 100706 U.K. 105312 U.S.A. 1226306 Italy. 239/32. France. 483275. IMPORTANT NOTE TO MACHINISTS STAMP ON CROWN PATENT Nos U.K. 100706 U.K. 105312 EXAGGERATED CONTOUR TO SHOW GRINDING All grinding limits + .0" / - .002" -.024" -.012" -.010" -.008" -.008" -.008" Dead bore + .012" - 0.14" M/m 32x1 0.25" grinding Angle ¢ of Gudgeon Pin 10 Slots equally spaced 18° 4 11/16" ± (See contour) SECTIONAL INVERTED PLAN ON LINE A B 6 Ribs equally spaced 6° GAUGE FOR INSIDE SPRING RING Gap when free about 3/4" 1/4" 1 1/4" No 11 4 11/16" dia (to suit rays) Edges of all ring grooves to be chamfered .010" at 45° PISTON FOR ROLLS ROYCE CAR ENGINE THE AEROLITE PISTON CO LTD HANOVER COURT YARD HANOVER STREET LONDON W.1. ROLLS-ROYCE, LIMITED PRINT ROOM. 20 JAN. 20 DERBY MATERIAL: #92 Alloy PER SET: 6 Date of Alteration Sub-Number Initials | ||