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).
Data sheet showing the results of a starter motor brake test, including relevant formulas.
| Identifier | ExFiles\Box 64\1\ scan0279 | |
| Date | 21th April 1927 | |
| STARTER MOTOR TESTS. FORM 3. BRAKE TEST. Φ_T and Φ_E Φ_T = β T/C where β = 10.5b / 1.41 ZP Φ_E = α E/N where α = (60x10^5xb) / Z P b/ZP = .00610 α = 36,600 β = 432.5 C. | I_T | T/C | Φ_T | E | N | E/N | Φ_E ---|---|---|---|--- |---|---|--- 20 | - | - | - | 11.60 | - | - | - 30 | - | - | - | 11.40 | - | - | - 40 | 2.5 | .0625 | 26.05 | 11.20 | 2240 | .00500 | 183.0 50 | 7.0 | .140 | 60.6 | 11.00 | 2000 | .00550 | 201.5 60 | 11.7 | .195 | 84.4 | 10.80 | 1825 | .00592 | 216.5 80 | 22.0 | .275 | 119.0 | 10.40 | 1520 | .00684 | 250.5 100 | 33.7 | .337 | 145.8 | 10.00 | 1290 | .00775 | 283.5 120 | 45.0 | .375 | 162.2 | 9.60 | 1085 | .00885 | 324.0 140 | 56.7 | .405 | 175.1 | 9.20 | 900 | .01022 | 374.0 160 | 69.2 | .432 | 186.4 | 8.80 | 710 | .01240 | 453.0 180 | 82.2 | .457 | 197.6 | 8.40 | 530 | .01585 | 580.0 200 | 95.3 | .476 | 206.0 | 8.00 | 375 | .02135 | 781.0 220 | 108.5 | .493 | 213.0 | 7.60 | 240 | .03165 | 1159. 240 | 121.5 | .506 | 219.0 | 7.20 | 110 | .06545 | 2395. 21.4.27. | ||