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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).
Specification sheet detailing weight-saving modifications for the Continental Phantom III.

Identifier  ExFiles\Box 96\4\  scan0092
Date  28th August 1936
  
He/Ru.1/AV.28.8.36.

Continental Phantom III Specification.

SECTION
WEIGHT SAVING.

(1) Frame. Wraith Thickness. Additional
60 lbs.

(2) Aluminium in front suspension
40 lbs.

(3) Magnesium Gearbox, Clutch Pit, Bottom Half, etc.
30 lbs.

(4) Substitute Ph.II Continental rear Road Springs for Ph.III Springs
40 lbs.

(5) Engine Unit - at least
45 lbs.

(6) Electrical. Use 20/25 Dynamo and Battery
20 lbs.

(7) Flexible Flywheel
20 lbs.

(8) Exhaust System
50 lbs.

(9) Brake layout, light alloy rear drums
40 lbs.

(10) Petrol Tank
5 lbs.

(11) Steering Gear & Levers
10 lbs.

(12) Radiator
20 lbs.

(13) Lockheed Jacks instead of Smith's
20 lbs.

(14) Lightened Bumper Bars
15 lbs.

415 lbs. or
3.7 cwts.

Hall's Metal Big End & Main Bearings.

8-33 axle ratio.

It has been demonstrated in France that owing to the stiff frame and improved suspension of the Ph.III, aluminium wings can be used with impunity.
  
  


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