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).
Specifications and performance details for a T. & M. Patent Dynamo.
| Identifier | ExFiles\Box 3\5\ 05-page012 | |
| Date | 19th September 1911 guessed | |
| The curves in Fig. IV represent the voltage of the battery when supplying current to the lamps and effectively illustrate the very small voltage variation even when the Dynamo is charging the battery at maximum output. The lamp load of 8.5 amps was divided between two Head Lamp bulbs of 36 c.p. each, two Side Lamp bulbs of 6 c.p. each, and a Tail Lamp bulb of 6 c.p. giving a total of 90 c.p. which may be taken as a fair average if a really effective and safe driving light is required. Some Particulars of the T. & M.{Mr Moon / Mr Moore} Patent Dynamo Tested. Overall length 9 inches. Overall height 6 inches. Overall breadth 5½ inches. Diam. of Armature 3½ inches. Length of Armature 2½ inches. Armature wound with 760 conductors No. 20 wire. Field wound with No. 21 d.c.c. taking 1.8 amps. Weight of machine complete with pulley 27lbs. Maximum Output 150 watts or 5.5 watts per lb. weight. 12 | ||