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).
Delco high-speed coils, starting motors, and dynamos.

Identifier  ExFiles\Box 173\1\  img290
Date  12th February 1934 guessed
  
VI
Delco High Speed Coil
They know nothing of this, that is the one with the small vibrator
Starting
On the 12 & 16 they use 26-1 starting motor ratios. One reduction is built into the motor & gives them no trouble or fuss for silence. Their main trouble is with the flywheel ring. They use a solenoid remote controlled starter switch, not on dashboard.
Their starter motor is 4 15/16" dia and gives 42.0 lbs inches torque when stalled then taking 600 amps at 3 volts. (This torque seems big being 2 1/4 ours)
Dynamos
They are using straight shunt wound dynamos with current regulation. I enclose wiring diagram and output. They use direct air cooling on the dynamo, a thing we have been frightened of for so long.
  
  


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