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 showing a top-down and cross-sectional view of a flywheel with an air pressure test pipe.
| Identifier | ExFiles\Box 91\4\ scan0184 | |
| Date | 1st August 1935 guessed | |
| [ "BEHIND FLYWHEEL.", "FELT BETWEEN FLYWHEEL & COVER", "APPROX. SIZE OF PIPE.", "AIR PRESSURE PIPE FOR TESTS.", "SLOT.", "FELT." ], | ||