Rolls-Royce Archives
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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).
Comparison table of features for various horsepower dynamos and motors.

Identifier  ExFiles\Box 165\6\  img044
Date  16th December 1926
  
L.X5660
E.F.C
16.12.26.
DYNAMOS.
MOTORS.
| | 20 HP. | 40/50 HP. | 20 HP. | 40/50 HP. | Sequence.
Pole Pieces. | Laminated. | Solid. | Laminated. | Laminated. | Solid.
Armature laminations. | Thin, mica insulated & milled. | Thick, mica insulated & milled. | Thin, mica insulated & milled. | Thin, mica insulated & milled. | Thick, mica insulated & milled.
Slots. | Skewed. | Skewed. | Straight. | Straight. | Straight.
EFC.
  
  


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