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).
Blueprint diagrams for a 'Pierce' self-adjusting tappet and crankshaft damper.
| Identifier | ExFiles\Box 23\4\ Scan032 | |
| Date | 4th February 1932 | |
| SELF ADJUSTING TAPPET PIERCE, AIR ESCAPES HERE, DIAMOND BORED, SPRING ABOUT 10 LBS, .032 TO .062 AMOUNT OF OIL CONTROLLED TAPPET CLEARANCE, OIL FEED FROM CRANK CASE 25/30 LBS/D", BALL SEATS HERE WHEN TAPPET FULL, INERTIA ELEMENT, CRANKSHAFT NOSE, WHITE METAL BEARING, RUBBER AND FABRIC DISC, DOUBLE FAN DRIVE, CRANKSHAFT DAMPER PIERCE ->, 4/2/32 | ||