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).
Specification sheet for G.A. high-tension waterproof magnetos, detailing special features, types, and measurements.
| Identifier | ExFiles\Box 4\5\ 05-page098 | |
| Date | 15th May 1909 guessed | |
| SPECIAL FEATURES of the G.{Mr Griffiths - Chief Accountant / Mr Gnapp} A.{Mr Adams} High tension Waterproof Magnetos Design. Silent running. Ease of maintenance. Maximum efficiency. Ease of dismantling et repair. Rotation both ways. All types of G.{Mr Griffiths - Chief Accountant / Mr Gnapp} A.{Mr Adams} Magnetos are fitted with : (a) an indicator showing, at any moment, the next cylinder to fire. (b) an automatic timing device. N. B. — The attention of manufacturers is drawn to the fact that by a simple adjustment the armature of any of the G.{Mr Griffiths - Chief Accountant / Mr Gnapp} A.{Mr Adams} Magnetos may be made to revolve in either a clockwise or an anticlockwise direction. TYPES AND DESCRIPTION OF :: the 2 cyl. Waterproof Magnetos G.{Mr Griffiths - Chief Accountant / Mr Gnapp} A.{Mr Adams} Both types should be driven at crankshaft speed for engines where ignition points are distant of 180º. When ignition points are distant of 360º they should be driven at half speed of crankshaft. Type H S 2 driven { at engine speed is suitable up to 12 HP. at 1/2 eng. speed is suitable up to 8 HP. Type H R 2 driven { at engine speed is suitable up to 24 HP. at 1/2 eng. speed is suitable up to 12 HP. MEASUREMENTS IN MILLIMETERS TABLE 1: Types | A | B | C | D | E | F | G | H | I | J | K | L | M | N | O HS{Lord Ernest Hives - Chair} 2 | 35,3 | 26,5 | 85 | 35 | 13,5 | 50 | 64 | 67 | 2 | 193,5 | 153 | 146,5 | 15 | 24 | 43 HR 2 | 35,3 | 26,5 | 85 | 35 | 13,5 | 50 | 64 | 67 | 2 | 193,5 | 175 | 166 | 15 | 24 | 43 TABLE 2: Types | P | Q | R | S | T | U | V | W | X | Y | Z | a | b | c HS{Lord Ernest Hives - Chair} 2 | 80 | 82 | 55,5 | 121 | 53 | 15 | 14 | 28 | 15 | 12 | 211,5 | 55 | 50 | 42,5 HR 2 | 80 | 82 | 55,5 | 121 | 53 | 15 | 13 | 28 | 15 | 12 | 211,5 | 55 | 50 | 42,5 G.{Mr Griffiths - Chief Accountant / Mr Gnapp} A.{Mr Adams} Magnetos :: Electric lighting :: JARNAC Carburetters :: Arecal :: Refrigerators :: Foot warmer :: Pumps :: Sheet-iron. | ||