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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).
Summary of issues and resolutions relating to a petrol pump.

Identifier  ExFiles\Box 27a\2\  Scan091
Date  24th March 1932
  
-2- He/Rn.{Mr Robinson}7/KT.24.3.32.

and consequently the plunger making metallic contact
with considerable velocity at A, (See sketch).

Summarising the troubles that have been
eliminated, and those which remain to be dealt with -

R.R. Petrol Pump.

Troubles that have been dealt with.

(A) Insufficient High Speed Delivery.

(1) Alteration in Fabric return spring.
(2) Incorporation of air bottles in the system.
(3) Making tappet follow cam.
(4) Getting fabrics the correct fit.
(5) Incorrect position of valve ports
relative to seats.

(B) Insufficient Low Speed Delivery and
too much time to prime on Starter Motor.

(1) Insufficient stroke on Peregrine
and J.III pumps.
(2) Too much capacity in line between pump
and rear tank. .250 dia. line introduced
and small capacity filter.
(3) Pump compression ratio too low.
(4) Pump size too small. Increased size
of pump now designed.

(C) Mysterious Failures on the road.

(1) Vapour lock. Petrol pipe moved from
contact with the frame.
(2) Valves not seating. Wrong relative
position of valve and port.
(3) Sticking guide for fabric. Undercut
guide in centre and increase clearance.
(4) Foreign matter on valve seats. There
  
  


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