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).
List of samples and failures of various pistons kept in garage stores.
| Identifier | ExFiles\Box 27\2\ Scan398 | |
| Date | 24th May 1934 guessed | |
| 41204 Samples & Failures kept in Garage Stores. PISTONS. 2. EB.1299 (Bentley). No records. 1. E.56610 A.P. off first Bentley, circlip failure after 5,000 miles. 1. E.B.1299 (Bentley) strengthened gudgeon pin boss, special heat-treatment, cracked at top of web, 5 hours test. 1. LeC.3667 (Bentley) semi-split, cracked across gudgeon pin boss after thirteen hours test, number 5. 1. E.B.1299 A.P. No records. Had chalk test. 1. Off R.{Sir Henry Royce} Summers' car, 1,500 miles. 1. E.B.495 (Bentley) Mx.{John H Maddocks - Chief Proving Officer} bedding, short cyl. barrels, cracked at top of skirt. Test 1. 1. E.56610 (Bentley) made in crankcase alloy, mistake, crown came off after 1,800 miles. 1. E.B.495 A/D.404. (Bentley). Bottom land dimensions reduced to give wide bedding, failed after 6,400 miles in France. 1. Aerolite, 15 ozs. (Bentley) 10 hours endurance run, 7:1 compression ratio, cracked across gudgeon pin boss (sectional). 3. Aerolite (A.122 alloy) (Bentley). B-IV unit. Failed. 1. Nelson Rohnnalite piston. 3. E.100525 Peregrine pistons. 1. E.82041. Ph.II. No records. S.U. pistons (in section) | ||