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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 a modified control for the butterfly valve in the exhaust pipe.

Identifier  ExFiles\Box 38\4\  Scan045
Date  28th June 1923
  
R.R. 75a (5 M) (S.J. 19), 12-10-21: G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 3087.
X3436
COMPLETED 28.6.23.
STANDARDISATION of CHASSIS PARTS.
Date 28.6.23.
X No. 3436
Drawing No.
Part List

Description of Parts.
Modified control for butterfly valve in exhaust pipe.
To prevent the possibility of the exhaust butterfly valve holding open carburetter throttle.

Experimental Test Report.
This modification consists of the butterfly valve being closed by a spring. If this valve sticks, it would remain wide open and no harm would result.

Road Test Report.
Run 3600 miles on 6-EX.
" 2500 " " 49-GB.
Has given no trouble.

A Scrap and replace at all costs, including Chassis already delivered to customers.
B Scrap and replace on Chassis in works.
C Scrap present stock and replace on all Chassis not yet handed to test.
D Use existing stock Alteration effective on future Chassis.

Cost of Parts in Works which will be scrapped if commenced on :-
Forthwith
Series..........£.25. 13. 8
Series..........£.......
Series..........£.......

Storekeeper advised re above:
Storekeeper's Signature

Signature of Exp. Dept. that above is correct. E.{Mr Elliott - Chief Engineer} Hives.
Weight of Old Part. Cost of Old Part. £0. 19. 1
Weight of New Part. Cost of New Part. £1. 9. 8
Difference per Car. Difference per Car. £ 10. 7 increase.
Signature of Mr. De LOOSE that above is correct. MV/JW 18.5.23

SIGNATURES
Mr. JOHNSON 21.6.23 Agreed.
Mr. ROYCE 19.6.23 Agreed. FHR.
Mr. WORMALD 19.6.23 Agreed. Wor.{Arthur Wormald - General Works Manager}
Mr. ROWLEDGE 30.5.23 Agreed. Rg.{Mr Rowledge}
Mr. DAY 31.5.23 Agreed. Da.{Bernard Day - Chassis Design}
Mr. BAILEY 31.5.23 Agreed. BY.{R.W. Bailey - Chief Engineer}
Mr. PLATFORD 29.5.23 Agreed. EP.{G. Eric Platford - Chief Quality Engineer}
Mr. NORTHEY 1.6.23 Agreed. PN.{Mr Northey}
  
  


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