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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).
Typed document detailing the weights of the B.60 engine and comparing them to the Wraith engine.

Identifier  ExFiles\Box 10\5\  05-page111
Date  14th October 1938
  
COPY FOR FILES.

To Rm.{William Robotham - Chief Engineer} from Rm{William Robotham - Chief Engineer}/Cb. 658 also 1044 Typed 14.10.38.

B.60 ENGINE WEIGHTS.

Engine weights as illustrated in attached
photographs .............. 453 lbs.

This does not include:-

Fan blades....................approx 1 lb. 8 ozs.
Fan belts.......................... 1 lb.
Dynamo........................... 22 lbs. 12 ozs.
Self-Starter....................... 24 lbs.
Rocker Shaft and Pedestal.......... approx 4 lbs.
Manifolds and Carburetter as Wraith.. 17 lbs. 4 ozs.
Clutch........................... 28 lbs.
Clutch case...................approx 7 lbs.
Coils............................ 3 lbs. 4 ozs.

Adding these weights to those of the } 561 lbs. 12ozs.
engine one gets }

The weight of a mech. petrol pump is .... 5 lb. 8 ozs.
(approx.)

Parallel weights for the Wraith are as follows:-

Engine in same condition as B.60 engine
illustrated...................... 470 lbs.

Fan blades........................... 1 lb. 8 ozs.
Fan belt............................. 8 ozs.
Dynamo........................... 23lbs. 14 ozs.
Self-starter......................... 22lbs. 9 ozs.
Rockers, shaft and pedestals......... 6lbs. 6ozs.
Manifolds and Carburetter.......... 17lbs. 4 ozs.
Clutch........................... 27lbs. 2 ozs.
Clutch Case.......................... 8lbs. 15 ozs.
Coils............................ 3lbs. 9 ozs.

When these weights are added to the } 581lbs. 11 1/2ozs.
previous engine weight one gets }

It must be borne in mind that the B.60 engine
incorporates a mechanical petrol pump.

Rm{William Robotham - Chief Engineer}/Cr.{Mr Cra???ster / Mr Chichester}
  
  


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