Brake test observation log for a starter motor.
| Identifier | ExFiles\Box 64\1\ scan0271 | |
| Date | 28th April 1927 | |
| X. 7620. STARTER MOTOR TESTS. FORM 1. BRAKE TEST. (OBSERVATIONS). Date:- 28-4-27 Motor under test:- R.R. Sequence. NO C2 Two series two parallel Dia. of brake wheel :- 24" Weight of pan and portion of rope 5 lbs. 0 ozs. Reduction of epicyclic gear ratio:- 96:31 TABLE DATA: Load in pan (W) (lbs), Spring balance reading (S) lbs. ozs., Motor armature speed R.P.M., Amp-eres. (C), Terml. volts. (E), W-S (lbs), T-t (lbs), Brake Torque (lb-ins.), Equivalent Torque at motor armature speed (pound-inches) (Tr {Capt. F. W. Turner - Finance} ), Remarks 20, 1:6, 415, 300, 6.00, 18.625, 23.625, 283.50, 91.60 18, 1:6, 545, 281, 6.38, 16.625, 21.625, 259.50, 83.80 16, 1:5, 690, 261, 6.78, 14.688, 19.688, 236.26, 76.40 14, 1:3, 830, 244, 7.12, 12.813, 17.813, 213.76, 69.00 12, 1:0, 985, 226, 7.48, 11.000, 16.000, 192.00, 62.00 10, 15, 1150, 208, 7.84, 9.031, 14.031, 168.37, 54.40 8, 14, 1345, 185, 8.30, 7.125, 12.125, 145.50, 47.00 6, 13, 1540, 160, 8.80, 5.187, 10.187, 122.24, 39.50 4, 12, 1775, 141, 9.18, 3.250, 8.250, 99.00, 31.95 2, 10, 2020, 125, 9.50, 1.375, 6.375, 76.50, 24.70 0, 8, 2325, 102, 9.96, -.500, 4.500, 54.00, 17.45 (Handwritten vertically on right edge): X 7620 (Handwritten on bottom left): 20.4.27. | ||
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).