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).
Technical notes on progressive lap winding, detailing forward and backward pitches and a step sequence.
| Identifier | ExFiles\Box 68\4\ scan0175 | |
| Date | 8th June 1928 guessed | |
| Handwritten Text: (7) (3). Progressive lap Pitches forward 9, coil 4 slots Pitches backward 7, com 3 slots Step 1 to 5. Table Columns: Up: 1, 3, 5, 7, 9, 11, 13, 15, 17, 19 Down: 10, 12, 14, 16, 18, 20, 2, 4, 6, 8 Printed Text (Reversed on original document): Header: ALTERATIONS TO R.R. AERO ENGINE PARTS. Column Headers: Description of Parts, Origin, Experimental Test Report, Cost of Parts in Works and Stores, Weight of Old Part, Cost of New Part, Weight of New Part, Difference per Engine, REMARKS, SIGNATURES, DATE. Signatories: Mr. JOHNSON, Mr. ROYCE, Mr. WORMWALD, Mr. NIXON, Mr. PLATFORD, Mr. BAILEY. | ||