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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).
Test report sheet detailing starter motor brake test results.

Identifier  ExFiles\Box 34\3\  Scan174
Date  21th April 1927
  
STARTER MOTOR TESTS.
FORM 3. BRAKE TEST. Φ_F and Φ_E
45a
Φ_F = β * C/T where β = S / 1.41 D^2 (S and D^2 are struck through)
Φ_E = α * E/N where α = 60*10^8 / Z P F (F is struck through)
b/ZP = 1/80
α = 10^5 / 3
β = 394

Table of results:
Column Headers: C., T, C/T, Φ_F, E, N, E/N, Φ_E
Row 1: 20, --, --, --, 11.55, --, --, --
Row 2: 30, 3.6, .120, 47.2, 11.37, 3150, .00361, 120
Row 3: 40, 8.0, .200, 79.2, 11.20, 2530, .00443, 148
Row 4: 50, 12.9, .258, 102.2, 11.00, 2080, .00529, 176
Row 5: 60, 18.4, .307, 121.2, 10.85, 1815, .00598, 199
Row 6: 80, 30.6, .3825, 151.2, 10.50, 1440, .00729, 243
Row 7: 100, 43.2, .432, 170.2, 10.20, 1140, .00895, 298
Row 8: 120, 57.1, .476, 188.2, 9.90, 880, .01125, 375
Row 9: 140, 71.0, .507, 200.2, 9.65, 700, .01380, 460
Row 10: 160, 85.0, .531, 210.2, 9.50, 540, .01760, 587
Row 11: 180, 99.0, .550, 217.2, 9.38, 410, .02290, 763
Row 12: 200, --, --, --, --, --, --, --
Row 13: 220, --, --, --, --, --, --, --
Row 14: 240, --, --, --, --, --, --, --

21.4.27.
  
  


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