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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 from The Sphinx Manufacturing Co. Ltd. detailing successes of their AC-SPHINX plugs in motorsport events.

Identifier  ExFiles\Box 79\2\  scan0173
Date  29th June 1922
  
S-W
Experimental Dept.

INCORPORATING THE AC SPARKING PLUG CO. LTD. X1026

TELEGRAMS:
"SPHINX, BIRMINGHAM"
TELEPHONE:
MIDLAND 1742 2 LINES PRIVATE BRANCH EXCHANGE.

[STAMP: Hs{Lord Ernest Hives - Chair} SPHINX RECEIVED JUN 29 1922]
[STAMP: J.S. RECEIVED JUN 1922]
[STAMP: RECEIVED 27 JUN 1922]

THE SPHINX MANUFACTURING CO. LTD
ESTABLISHED 1904.
SPECIALISTS IN SPARKING PLUGS.
MAKERS OF MOTOR ACCESSORIES.
BRADFORD STREET, BIRMINGHAM.

SALES 533.

LONDON OFFICES.
107, BISHOPSGATE, E.C.2.

DIRECTORS:
H.{Arthur M. Hanbury - Head Complaints} G.{Mr Griffiths - Chief Accountant / Mr Gnapp} LONGFORD
W. A.{Mr Adams} CLARK

Dear Sirs,

You will be interested to hear that AC-SPHINX Plugs have again demonstrated their high efficiency in the following recent events:-

On April 7th Haugdahl broke all World's Speed Records under International Motor Contest Association rules as follows (electrically timed):-

1 mile 19.97 secs. Speed 180.27 miles per hour.
5 miles 1 min. 56 secs. " 155.17 miles per hour.
10 miles 3 mins. 56 secs. " 162.70 miles per hour.

On May 30th Murphy on a Miller Straight eight engine (Duesenberg chassis) won the 500 Mile Indianapolis Race at an average speed of 94.48 miles per hour.
AC Standard 5/- Plugs were used in both instances.

On June 17th Geo. H.{Arthur M. Hanbury - Head Complaints} Tucker achieved the World's Sidecar Record for the 600 c.c. class event at Brooklands at an AVERAGE speed of over 54 miles per hour using an AC-SPHINX Plug.

These continuing successes serve to indicate the sound merit of our plug design and the sterling quality of the materials used in their production.

AC-SPHINX Plugs are British. Their efficiency is beyond question and their cost to you as your standard engine equipment the lowest of all high-grade plugs.

Yours faithfully,

THE SPHINX MANUFACTURING CO. LTD.
  
  


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