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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).
Cost comparison of different rear axle construction designs.

Identifier  ExFiles\Box 7\3\  X 602 Axle Rear-page20
Date  24th September 1936
  
To Wor.{Arthur Wormald - General Works Manager} & R.{Sir Henry Royce}
c. to Sg.{Arthur F. Sidgreaves - MD}
c. to By.{R.W. Bailey - Chief Engineer}
c. to Ba.
c. to Hdy.{William Hardy}

602

Ha/Ory.13/AR.24.9.36.

Rear Axle Construction.

In view of the recent discussion on altering rear axle design, we have been very thoroughly into the question of saving cost on our rear axles. This could be achieved in two distinct stages: firstly alterations to the axle case without altering the internal design or type, and secondly, adaption of the half floating type.

Considering the first type, we have arrived at the following figures, cancelling out parts which cost the same in all cases -

| Type | Cost (Material & labour) | Remarks |
|------------------------------------------------------------------------|--------------------------|------------------------------------------|
| Present Ph.III design. | 90/- | |
| Banjo - Scott type. | 45/- | Unsuitable material & unnecessarily heavy. |
| Banjo - two halves welded top & bottom. | 53/- | |
| Separate axle tubes as now; but made up of taper tube with butt welded end flanges. | 40/- | Lightest and cheapest. |
  
  


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