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 detailing modifications to a perforated pipe and a component described as a 'Top Hat'.
| Identifier | ExFiles\Box 104\2\ scan0112 | |
| Date | 14th September 1934 | |
| HS{Lord Ernest Hives - Chair} 1514 56 - 5/16" DIA HOLES ROUND BOTTOM HALF OF PIPE. 56 - 5/16" DIA HOLES ROUND TOP HALF OF TOP HAT 4.500" 5.250" MOD To HS{Lord Ernest Hives - Chair} 1436. 56 - 5/16" DIA HOLES ROUND BOTTOM HALF OF TOP HAT. ROLLS-ROYCE, LTD TOOL ROOM 14 SEP 1934 DERBY. 14-9-34 | ||