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 on crankshaft bending in an experimental engine.
| Identifier | ExFiles\Box 127\4\ scan0028 | |
| Date | 13th February 1936 | |
| CHEV. 164 TECHNICAL TEST REPORT ENG. CHEVROLET DEPT. DETROIT, MICHIGAN SHEET NO. 2. NO. OF SHEETS 4. WORK ORDER 6205-3. DATE 2-13-36. FILE NO. *6. Reported 4-14-36. value used by G.M. Research. Since the actual movement of the shaft end was very small it was amplified by an optical indicator which had a magnification of 50 to 1. During the test the optical indicator was supported from the dynamometer bed plate. The ball and socket joint was adjusted so its center line did not coincide with that of the crankshaft. This eccentricity caused the beam of light to follow a circular path when the engine was motored at low speed without compression. The path of the light beam was traced upon a sheet of transparent paper fastened on the optical indicator glass screen while the engine operated under 20 pounds load (1.75' dynamometer arm) and then under full load at each speed increment. A diagram obtained with the engine idling at 500 R.P.M. was then traced upon the card and used as the base line from which all amplitudes were measured. Cards were taken with the engine operating at 500, 1000, and 1500 R.P.M. and then over the speed range of 2000 to 4200 R.P.M. by increments of 200 R.P.M. RESULTS OF TEST: - INDEX OF CRANKSHAFT BENDING IN EXPERIMENTAL ENGINE #5050-28-H.{Arthur M. Hanbury - Head Complaints} See curves on sheet #3. Reported By:- E.{Mr Elliott - Chief Engineer} H.{Arthur M. Hanbury - Head Complaints} Holtzkenper. Signed A.{Mr Adams} J.{Mr Johnson W.M.} Underwood Test Department Signed F.{Mr Friese} A.{Mr Adams} Collins Experimental Engineer LWS. | ||