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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).
Letter to Joseph Lucas Ltd. detailing faults with horns and headlamps found during testing of a new Bentley 3½ litre chassis.

Identifier  ExFiles\Box 59\3\  Scan272
Date  23th October 1933
  
6032

Hs{Lord Ernest Hives - Chair}/Wst.2/MA. 23rd October, 1933.

Dr. E.O. Turner,
Messrs. Joseph Lucas Ltd.,
Great King Street,
BIRMINGHAM, 19.

Dear Dr. Turner,

We have been carrying out some very strenuous tests on the new Bentley 3½ litre chassis in touring trim on the Continent. As a result of these tests I am sending to you under separate cover a pair of horns type HF.{H. W. Frost - Coachwork Inspector}728 which we have had to remove from the chassis due to their tone altering thereby upsetting the effective blending of the two notes as a dual note combination.

I should be much obliged if you would have these horns examined to ascertain the cause of their loss of tone at the same time having the same reconditioned and returned to us as soon as possible or replaced by another pair.

A further point arising out of our tests is that pertaining to the head lamps. These head lamps are of the new pattern type K.166 with a stream-lined body. The wire of the central terminal of the lamp bulb on the reflector is secured by means of a spring washer holding the wire taut against a hole.

On this Bentley chassis the wire has repeatedly broken away due to vibration and has fallen on to the lamp body, short circuiting and blowing the lamp fuse. /the supply
  
  


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