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 for a piston for a car engine, supplied by The Aerolite Piston Co Ltd.
| Identifier | ExFiles\Box 77\1\ scan0028 | |
| Date | 4th March 1919 | |
| NUMBERS OF LETTERS PATENT U.K 100,705 U.K 105,312 U.S.A. 1,226,308 Italy. 239/52. France. 483,275. IMPORTANT NOTE TO MACHINISTS STAMP ON CROWN PATENT NOS U.K 100,705 U.K 105,312 All grinding limits + .0" - .002" EXAGGERATED CONTOUR TO SHOW GRINDING -.024" -.012" -.010" -.008" -.008" Dead bore +.010" / +0.4 m/m 0.28" Grinding Angle SECTIONAL INVERTED PLAN ON LINE A B C/L of Gudgeon Pin 10 Slots equally spaced 4 1/2" ± (See contour) 6 Ribs equally spaced GAUGE FOR INSIDE SPRING RING Gap when free about 1/4" 4 11/16 dia (to suit rings) Edges of all ring grooves to be Chamfered 1/64 x 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 | ||