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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).
Technical description of the vehicle's pressed steel frame, its stiffening, and engine mounting.

Identifier  ExFiles\Box 75\3\  scan0275
Date  24th November 1913
  
FRAME. Extract from Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}/L241113.

x962

The frame is pressed steel of ordinary design. An outrigger is fixed on the rear cross member to carry the transverse spring and the frame is stiffened at this point by channels running from the outrigger to the sides of the frame diagonally. There is a pressed cross member in front of, and one behind the gear box, and the gear box is carried on pressed channels running from one of these members to the other.

Wor{Arthur Wormald - General Works Manager}/Hy{Tom Haldenby - Plant Engineer}/L241113. Sheet. 4.

Instead of fitting separate gussetted plates at the joints of members the gusset is usually pressed [handwritten correction, 'brazed' is struck through] all in one with the member.

A pressed cross member is fitted just behind the radiator, about 21" from the front dumb iron.

The crank case has no arms, but the engine is supported at the back by four 5/8" bolts and at the front end by two 5/8" bolts which run straight up through the crank case.

x962

At the back and front of the engine drop forged I section bridges are fixed across the frame with suitable holes to receive the 5/8" bolts mentioned above. The section of these bridges is about the same as our front axle.
  
  


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