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).
Instruction sheet detailing the testing and incorrect readings of a Deschnevaux Speedometer.
| Identifier | ExFiles\Box 39\2\ Scan245 | |
| Date | 13th December 1917 | |
| X3508 ROLLS-ROYCE LIMITED. INSTRUCTIONS. To: Mr Hives Order No. Customer's No. The Deschnevaux Speedometer We have tested the entire instrument on its bench. It is hopelessly incorrect. In its first place the two fingers do not register your, second speed 20m/h & one finger shows 25 the other 20. At slow speed 4 miles p h the instrument shows 25 to 30 m p hr. Signed | ||