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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).
Page from a report detailing formulas for calculating boiling points at various altitudes.

Identifier  ExFiles\Box 16\2\  Scan095
Date  24th September 1936 guessed
  
-2-

But t₁ + T₀ = 100

∴ t₁ = 100 - T₀

∴ T = B - (100 - T₀) / d

Hence, from this formula, for any given set of conditions the air temp. to boil at any altitude may be found, knowing the air temp. to boil at sea-level.

Attached are three sheets - one showing variations of boiling point, air temperature and relative air density with altitude, the next showing variation of temp. to boil figure with altitudes for three different cases, and the third showing variation of seal level air temperatures necessary for boiling to take place at given altitude.

Hs{Lord Ernest Hives - Chair}/Std.
  
  


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