Comparing the Waltham and Elliott speedometers, discussing reliability, operation, and readability.
| Identifier | ExFiles\Box 8\2\ 02-page28 | |
| Date | 18th July 1921 | |
| E.H. 202A (100 T) Cl. Sc. 70d. 10-15-20) O. {Mr Oldham} 5247 x613 W/S {Derby Works / Sales} C. from HS. {Lord Ernest Hives - Chair} Hs {Lord Ernest Hives - Chair} 3/LG18.7.21. X2915 x613 RE: SPEEDOMETERS. With reference to your letter Bs {A J. Barnes - Assistant Manager} 8/EN15.7.21. We have certainly found the Waltham Speedometer more reliable than the Elliott. The advantages we have found in the Waltham are:- 1. Absolute silence in operation. 2. Reliability. The only point we have against the Waltham is the fact that it is a moving-dial type instead of the moving-hand. This makes it rather more difficult to read - with a moving-hand type of instrument one has only to glance at the position of the hand to know at what speed the car is travelling. With the moving-dial type of instrument it is necessary to read the figures on the dial in order to know the speed. As regards the fitting of the Waltham speedometer on a 40/50 chassis, we would recommend that you get in touch with the Waltham people in London and I am sure they will get out a suitable standard fitting for R-R cars. We believe that Mr. Chichester's car was fitted with a Waltham speedometer sometime ago. You might obtain particulars from him as to how this speedometer behaves on his car. Hs. {Lord Ernest Hives - Chair} | ||
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).