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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).
Standardisation of chassis parts, specifically 895mm x 150mm tyres.

Identifier  ExFiles\Box 171\3\  img008
Date  6th March 1919
  
R.R. 766 (5 M) (S.A. 325. 25-2-15) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 0981.
COMPLETED 4.4.19.
STANDARDISATION of CHASSIS PARTS.
Description of Parts.
ORIGINAL
895mm x 150mm Tyres.
Drawing No. X 3044.
Part List.
Origin.
MR. Royce's Suggestion.
Experimental Test Report. Ry10/P24219. Road Test Report. ----
Mr. Royce suggests that what was know in pre-war days as the 895 Oversize tyre, that is a tyre 895mm x 150mm which actually fits on the same rim as the old standard 895mm x 135mm, should be made standard for production on the 40/50 chassis.
Signature of Exp. Dept. that above is correct.
Weight of Old Part. Dunlop wire wheel fitted with Dunlop groove tyre 895mm x 135mm - 68lbs.
Cost of Old Part. £ wheel 4/4/7 Ty/Cov 15/7/6 Ty/Tube 1/7/11
Weight of New Part. Rudge-Whitworth detachable wheel with Dunlop Magnum tyre 895mm x 150mm - 72lbs.
Cost of New Part. £ wheel 3/16/8 Ty/Cov 16/11/8 Ty/Tube 1/14/0
Difference per Car. £ 3/16/8
Signature of Mr. DELOOZE that above is correct.
Cost of Parts in Works and Stores which will be scrapped if commenced on:-
Series............£.........
Series............£.........
Storekeeper advised re above.
Storekeeper's Signature.
SIGNATURES | DATE | REMARKS
Mr. JOHNSON. | 3.4.19. | Agreed C.Johnson.
Mr. ROYCE. | 2.4.19. | Agreed FHR.
Mr. WORMALD. | (Absent)
Mr. NADIN. | (Absent in U.S.A.)
Mr. PLATFORD. | 17.3.19. | Agreed. EP.{G. Eric Platford - Chief Quality Engineer}
Mr. NORTHEY.
Mr. Bailey. | 6.3.19. | Agreed. BY.{R.W. Bailey - Chief Engineer}
  
  


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