Rolls-Royce Archives
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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).
Ignition timing advance curves for the Wraith and Bentley V models.

Identifier  ExFiles\Box 168\3\  img137
Date  13th April 1939
  
-3-
13.4.39.

DW.426. (Wraith)

Advance degrees. Speed R.P.M.
0° - 125 - 150.
1° - 150 - 190
2½° - 275 - 330
4½° - 450 - 525
9° - 650 - 725
12° - 900 - 1000
14° - 1100 - 1200.

Full advance - 14° - 15°.

*****************

DB.{Donald Bastow - Suspensions}228/ (Bentley V).

Advance degrees. Speed R.P.M.
0 - 125 - 150.
1° - 135 - 170.
3° - 220 - 280.
6° - 400 - 470.
9° - 640 - 750.
12° - 1120 - 1380.
13½° - 1500 - 1750.

Full advance 13½° - 14½°.

*****************

Hm{Capt. W. Hallam - Head Repairs}/KC.
  
  


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