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).
Table of diameter measurements for 'Aerolite' A122 Alloy pistons from an Ulster Bentley.
| Identifier | ExFiles\Box 90a\2\ Scan178 | |
| Date | 12th July 1934 | |
| Header: 'AEROLITE' PISTONS - A122 ALLOY. ULSTER BENTLEY. Subtitle: DIAMETERS OF RING LANDS AND SKIRT TAKEN IN POSITIONS SHEWN. Table Data: Piston, A, B, C, D, E, F, G, H, I, J, K 1, 3.2318, 3.2315, 3.2315, 3.230, 3.230, 3.2322, 3.232, 3.232, 3.2454, 3.245, 3.2452 2, 3.2312, 3.2312, 3.2312, 3.2298, 3.2305, 3.232, 3.2318, 3.2318, 3.2452, 3.245, 3.245 3, 3.232, 3.232, 3.232, 3.2298, 3.229, 3.2325, 3.232, 3.232, 3.2452, 3.2453, 3.2457 4, 3.232, 3.232, 3.232, 3.230, 3.2308, 3.2327, 3.2325, 3.2325, 3.2452, 3.2451, 3.2451 5, 3.2325, 3.2325, 3.2325, 3.2298, 3.2295, 3.232, 3.2317, 3.2317, 3.2453, 3.245, 3.2453 6, 3.2317, 3.2317, 3.2318, 3.230, 3.231, 3.2324, 3.2322, 3.2322, 3.2452, 3.245, 3.245 Note: NOTE:- THERE ARE 3 BLOWHOLES ON BEDDING PORTION OF NO. 1 PISTON. ALSO SLIGHT POROSITY IN G-PIN. BORE. SLIGHT POROSITY ON SKIRTS OF OTHER PISTONS. | ||