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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).
Table of nozzle dimensions and their corresponding length-to-bore ratios for calculating the flow of liquids.

Identifier  ExFiles\Box 36\1\  scan 057
Date  9th May 1917
  
R.R. 235 A (770 H) (S.D). 442 9-5-17) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 1965.
-2-
X. 2907 - FLOW OF LIQUIDS THROUGH NOZZLES.

Nozzle. Bore. Length. Length/Bore ratio.
A.1 3/64 ½" 10.7
A.2 3/64 ¾" 16.0
A.3 3/64 1¼" 26.7
A.4 3/64 2" 42.7
B.1 3/32 ¾" 8.0
B.2 3/32 1¼" 13.3
B.3 3/32 2" 21.3
B.4 3/32 2¾" 29.3
C.1 1/8 1½" 10.0
C.2 1/8 2" 16.0
C.3 1/8 2¾" 22.0
C.4 1/8 3½" 28.0
D.1 3/16 2" 10.7
D.2 3/16 2¾" 14.7
D.3 3/16 3½" 18.7
D.4 3/16 4½" 24.0

[Diagram of a nozzle cross-section]
Labels on diagram:
Length
Bore
.750
  
  


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