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).
Instructions for checking the revolution indicator and speedometer on every Bentley chassis.
| Identifier | ExFiles\Box 165\4\ img204 | |
| Date | 13th July 1933 | |
| 86004 Mx.{John H Maddocks - Chief Proving Officer} From Ha/Wst. c. to Ey. c. to Wor.{Arthur Wormald - General Works Manager} c. to EP.{G. Eric Platford - Chief Quality Engineer} Ha/Wst.3/MA.13.7.33. BENTLEY REVOLUTION INDICATOR AND SPEEDOMETER. It is important that a careful check be made of the above instruments on every Bentley chassis. The rev indicator need only be checked with the pointer at a scale reading of 4500 R.P.M. and should shew a Hasler reading not more than 1100 R.P.M. Any rev counter exceeding this limit should definitely be rejected. The speedometer (calibrated for 797 revs per.mile) should be checked at 60 M.P.H. and 100 M.P.H. and the drive revs should fall between the following limits :- (a) 60 M.P.H. - 752 to 766 R.P.M. (b) 100 M.P.H. - 1232 to 1258 R.P.M. Will you please arrange accordingly. Ha/Wst. | ||