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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 distributor gears on the magneto to reduce noise.

Identifier  ExFiles\Box 172\3\  img080
Date  12th January 1925
  
RR 755 (10M) (SL321 2-11-23) MP 281297
ORIGINAL COMPLETED 29.1.25
STANDARDISATION of CHASSIS PARTS.
Date 12.1.25
X No. 4648
Drawing No.
Part List
Description of Parts.
DISTRIBUTOR GEARS ON MAGNETO.
Origin.
To reduce noise.
Experimental Test Report.
The makers of the Watford magneto have standardised magneto pinion with a large aluminium wheel for driving the distributor gears.
The object is to reduce the noise of the magneto.
Road Test Report.
Run 10,500 miles on 9-PK.
" 15,000 " " 98-NK.
" 5,000 " " 5-EX.
" 5,000 " " 49-GB.
Run 445 hrs. on bench.
On examination the pinion and wheel have been found in excellent condition.
There is a definite reduction in the noise but the amount of noise from the magneto can still be criticised.
Weight of Old Part. £
Weight of New Part. £
Difference per Car.
Cost of Old Part. £
Cost of New Part. £
Difference per Car. None.
Signature of Mr. De LOOZE that above is correct. My/Ris. 27.1.25
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:-
Series.........£.........
Series.........£.........
Series.........£.........
SIGNATURES | DATE | REMARKS
MR. JOHNSON | 29.1.25 | Agreed. C.Johnson.
MR. B. JOHNSON | 29.1.25 | Agreed. B.J.
MR. ROYCE | 17/1/25 | Agreed F H RoyceSir Henry Royce
MR. WORMALD | 13.1.25 | Agreed, less cost, and reduced noise.
MR. ROWLEDGE | 13.1.25 | Agreed. RG.{Mr Rowledge}
MR. DAY | 14.1.25 | Agreed. DA.{Bernard Day - Chassis Design}
MR. BAILEY | 13.1.25 | Agreed. BY.{R.W. Bailey - Chief Engineer}
MR. PLATFORD | 13.1.25 | Agreed. EP.{G. Eric Platford - Chief Quality Engineer}
MR. ELLIOTT | 13.1.25 | Agreed. E.{Mr Elliott - Chief Engineer}
MR. NORTHEY | 26.1.25 | Agreed. PN.{Mr Northey}
MR. HIVES | 27.1.25 | Agreed. E.Hives.
  
  


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