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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).
Endurance testing procedures for a distributor and camwheel, with additional instructions for reports and a Bentley Bed unit.

Identifier  ExFiles\Box 155\2\  scan0212
Date  27th April 1938
  
-3- Rm{William Robotham - Chief Engineer}/Swdl.{Len H. Swindell}2/MH.{M. Huckerby}27.4.38.

W.III. NO.4 - Cont'd.{John DeLooze - Company Secretary}

Spring driven up to date R.R. distributor.
Attwaters material camwheel, with hardened crank and dynamo pinions.

Endurance to consist of 50 hrs.

(a) each hour 30 mins. at 4000 R.P.M.
25 mins. at 4200 "
5 mins. at 4400 "

(b) each 10 hrs.
7 hrs. at full throttle.
2 " " ½ load.
1 hr. " " ¼ "

(c) Run on Ethyl fuel and Mobiloil Arctic at an inlet temp. of 100°C.

The gears should be noted for backlash and whether any rattle before commencing the endurance.

GENERAL.

(a) Report on Induction system and timing also general development and results up to date on B.III.

(b) Report of test on Wraith of comparison between small valve, venturi inlet port and std. cylinder heads.

NO. 2 TEST HOUSE.

BENTLEY BED.

B.23. OHC.

Remove this unit, following recording of torsional diagrams of crank.
  
  


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