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 detailing the results of component modifications on Buick, 30-EX, and 32-EX cars.
| Identifier | ExFiles\Box 124\3\ scan0365 | |
| Date | 18th October 1935 | |
| -2- Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls}25/KW.18.10.35. CAR TEST RESULT (8) Buick Original condition. .005 sliding piece, .005 C.M. pitch line, .015 sideshaft and float. No chunking (9) Buick (a) Sliding piece increased to .025, and subsequently - (b) C.M. pitch line increased to .012, and subsequently - (c) C.W. instead of Whitmore's oil. No difference (10) 9 (c) Except that 3rd motion shaft coupling given .005 rotational and .008 end slack (11) 30-EX New RR gears. All gears tight on splines. C.M. .001, 3rd speed overall .004, 2nd speed .002, direct drive .001, all at 1 1/2" radius. No chunking (but synchro engagement sticky). (12) 30-EX Early set of gears, large amount of slack of unknown amount, shafts end loaded, loose pinions .001 clearance endways and on diameter. No improvement (13) 32-EX As sent to France C.M. .006. Direct drive .0165) 3rd .004. 3rd .020 } 2nd .0035. 2nd .017 } Overall measured at 1 1/2" on 1st motion shaft. Better than 5 but not good enough standard | ||