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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).
Performance graph for a Bentley Marston Mk. VI block radiator.

Identifier  ExFiles\Box 149a\2\  scan0357
Date  15th February 1936 guessed
  
BENTLEY RADIATOR (Marston Mk.{R. E. B. Meade-King} VI BLOCK)

FRONTAL ASPECT = 3.24 sq ft (23¾" x 19⅝")
AREA = 3.22 sq ft
COOLING SURFACE:
Nº OF WATER PASSAGES = 37
DEPTH OF BLOCK = 52 M/M (= 2¹/₁₆")

WATER FLOW (A) = 35 GALLS/MIN
(B) 20 " / "

AIR INLET 60°F
WATER MEAN 160°F

Left Y-Axis: STATIC DIFF. IN AIR PRESSURE INS. WATER
MATRIX TRUNKED FORE & AFT

Right Y-Axis: H.P. DISSIPATED / 100°F.{Mr Friese} TEMP. DIFF. AIR IN TO WATER MEAN

Bottom X-Axis (Top Scale): AIR FACE VELOCITY M.P.H.
Bottom X-Axis (Bottom Scale): AIR FLOW. CU. FT/MIN. CAL.{Mr Calvert} AT 60°F & 29.9" HG.

Graph Data Labels:
H.P. DISSIPATED
AIR PRESSURE (AT TEMP. CONDITION AS STATED)
Curve Labels: A, B

Stamp (faint): ROLLS-ROYCE LTD. EXPERIMENTAL WORKS HUCKNALL
  
  


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