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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).
Flywheel experiments and the weights and inertia values of various components.

Identifier  ExFiles\Box 85\2\  scan0174
Date  10th May 1935
  
To Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer}

x 212

Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}2/KW.10.5.35.

Flywheel Experiments.

(1) 4-B-IV. B-7. Change lightened flywheel Hs.{Lord Ernest Hives - Chair}1416 for present Bentley production, N.Sch.3948.
(2) Millenite disc + inertia ring + 10" Borg & Beck on Y-4-BB in 2-B-IV.
(3) Borg & Beck Ex.18198 on B-3 in Streamlined car.

Further Flywheel Particulars.

Description            Weight        Inertia
(A) Disc Ex.12847            24 lbs.        650 lbs.in.² = .14
(B) Flywheel only of Ex.18198    48 lbs.        1560 "      = .34
(C) 10" Borg & Beck Clutch        16 "        250 "      = .055
(D) Inertia ring Ex.17549        14½ lbs.    630 "      = .13
(E) Borg & Beck 11" clutch        23 "        445 "      = .096

A + C + D                54½ lbs.        .325
B + C                    64 lbs.        .395

Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}
  
  


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