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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).
Specifications for the PHOENIX engine's electrical units: Dynamo, Motor, Ignition Distributor, and Ignition Coil.

Identifier  ExFiles\Box 168a\4\  img037
Date  23th September 1937
  
[Handwritten at top]
Childs 614H.
To Rm.{William Robotham - Chief Engineer}
Do you concur with these recommendations
BY/RD.2/B.23.9.37. Rm{William Robotham - Chief Engineer}

[Handwritten on left]
See no justification whatever for this, particularly as we are coming to overdrives. Rm.{William Robotham - Chief Engineer}

[Typed text]
PHOENIX - Engine Electrical Units.

DYNAMO.
5" Dia. 20 lbs. weight.
Shunt Wound, ventilated, voltage control.
Engine Revs - up to 4,500.
Axle Ratio 4.75 - 1, with overdrive giving 3.95 - 1.
17" Rims and 6" Tires.
Dynamo could run 1 1/2 times crank speed to obtain cut-in at 13 M.P.H. This would give dynamo an easier time at the higher engine speeds.
Provision to be made for a machine 9" long.

MOTOR.
Assuming engine to be 6 cylinder - 3 1/2 litre possibly 4 1/4, we need a motor of the Bentley size i.e. 4 1/2" Dia. x 8" long. Weight including drive - 20 1/4 lbs. Geared 14 - 16/1.

IGNITION DISTRIBUTOR.
3 1/8" Dia. model with better electrical features, - Double Contact Breakers, simplified automatic timing governor and vacuum control.

IGNITION COIL.
2 1/8" Dia. x 5" long. New pattern with inside H.T. and centre H.T. terminal. 6 1/2"

BY/[Signature]
  
  


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