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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).
Design progress report listing the status of modifications for the Phantom II, Vulture chassis, Mark 'F' tank, and Straight '8' engine.

Identifier  ExFiles\Box 30\4\  Scan192
Date  14th May 1934 guessed
  
PHANTOM II (5)
ITEM. CONTINUED. DESIGN POSITION.
----------------------------------------------------------------
Exhaust valve lift curve. In hand.
Double valve springs and tappet spring. In hand.
Engine lubrication system modifications - special for 21-EX. Completed.
Modifications to improve the rigidity of the valve gear. In hand.

VULTURE CHASSIS.
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Auto adjusting tappets - needle bearing eccentrics and modified oil feed. Completed.
Auto adjusting tappets - plunger with poppet valve. Completed.

MARK 'F' TANK.
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Modification to carburetter. Completed.
Fitting Solex carburetter to L.H.P.II engine. In hand.
Starter motor to function at large inclination angles. In hand.

STRAIGHT '8' 30-HP. ENGINE J.8.
---------------------------------
Cylinder head - investigation of alternative types. in hand.
Engine layout and valve operating mechanism - investigation of alternative types. in hand.
Investigation of dual downdraught carburetters. In hand.
Crankshaft, camshaft and tappet mechanism.investigation In hand.
  
  


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