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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).
The performance and issues of various electrical components.

Identifier  ExFiles\Box 83\1\  scan0255
Date  12th August 1936 guessed
  
( 16 )

ELECTRICAL EQUIPMENT.

Dynamo.
New, complete as follows:-
Armature LOP DB.{Donald Bastow - Suspensions}1100 Bearing Brackets LOP DB.{Donald Bastow - Suspensions}1101
Commutator LOP DB.{Donald Bastow - Suspensions}54093 Frame & Field Winding LOP D.54599.

Erratic charging was experienced on several occasions due to the brushes sticking in the holders. The battery charge was maintained throughout the mileage.

Starter Motor. LOP DB.{Donald Bastow - Suspensions}1098.
New, complete as follows:-
Armature LOP DB.{Donald Bastow - Suspensions}1077 Bearing Brackets LOP DB.{Donald Bastow - Suspensions}1078
Commutator LOP DB.{Donald Bastow - Suspensions}306 Frame & Field Winding LOP DB.{Donald Bastow - Suspensions}432.
EL.2911 Buttress Thread Drive Motor No S.8.BFX.

Quiet in operation and gave no trouble.

Headlamps Horns & Fittings. LOP DB.{Donald Bastow - Suspensions}1109.
Complete to above LOP
Headlamp Pillars.
Lucas H.F.Alto Horns.

The headlamps were very powerful and effective and the dippers satisfactory. Several bulb filaments failed as a result of vibration. The dipper warning light on the instrument board was found distracting when concentration was needed. It was disconnected. It is quite unnecessary.

The electric horns gave no trouble, but the note was rather harsh and tinny.

Footswitch. LOP DB.{Donald Bastow - Suspensions}695 R.R.Scheme.660.
Existing, complete to above LOP & Scheme.

There is a small spring which holds two arms together against a four lobe cam. This spring broke and one arm fell against the cover and caused an intermittent short circuit which blew the fuse of the dippers and O.S. headlamp. A simple insulated lining to the dipper switch cover would prevent a similar occurrence to an owner.

Stop Lamp Switch. LOP DB.{Donald Bastow - Suspensions}419.
Existing, complete to above LOP.
New Type Butler Stop & Tail Lamp.

This gave no trouble.

Handwritten text:
Are these as standardised for P.W.
W.A.R.
  
  


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