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).
Comparative heating tests and weights of various shunt-wound dynamos.
| Identifier | WestWitteringFiles\F\January1921\ Scan21 | |
| Date | 30th December 1920 | |
| R.R.285a (100 T) (S.H 159, 11-8-20) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2800 X.294. COMPARATIVE HEATING TESTS OF SHUNT-WOUND DYNAMOS AT CONSTANT OUTPUT. TABLE OF FINAL CONDITIONS. (After 3 or 4 hours running) Out-put [Test 1] 9 amps. at 14.6 volts. [Test 2] After 3 or 4 hours running. 12 amps. at 15.0 volts. Dynamo. Temp of carcase (°C). Temp. by field winding resistance. (°C). Speed R.P.M. Temp. of carcase (°C). Temp by field winding resistance (°C). Speed R.P.M. Smith A.{Mr Adams} 94 128 950 -- -- -- Smith 2D. 88 118 835 -- -- -- Westinghouse. 53 67 765 62 84 885 Bosch. 80 120 640 100 152 680 Bijur. 52 67 790 64 84 880 WEIGHTS. Smith "A" - 32 lbs. Smith "2d" - 32.6 lbs. Bijur - 30.5 lbs. Bosch - 37.0 lbs. Rotax - 27.0 lbs. U.S.A. Bosch - 21.1 lbs. Westinghouse - 30.7 lbs. EFC. | ||