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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).
Attaching curves showing the ignition advance required by the Peregrine engine.

Identifier  ExFiles\Box 179b\2\  img232
Date  29th December 1938
  
ORIGINAL

To R.{Sir Henry Royce} from He/Rs.{Sir Henry Royce's Secretary}
c. to SS.{S. Smith} W'r.{Sir Henry Royce}
c. to E.{Mr Elliott - Chief Engineer} DA.{Bernard Day - Chassis Design}
c. to HY.{Tom Haldenby - Plant Engineer} HdV.

He/Rs.{Sir Henry Royce's Secretary}6/KT. 29.12.38.

X4027

We attach herewith curves showing the
ignition advance required by Peregrine, and the
advance characteristics we can obtain by minor
modifications to the governor. The ultimate curve
required will be better estimated when the degree
of detonation taking place, at the conclusion
of 10,000 miles running in France with this
head, has been established.

He/Rs.{Sir Henry Royce's Secretary}
  
  


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