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).
Design options for a dashboard pump, specifically regarding valve opening and stopping mechanisms.
| Identifier | WestWitteringFiles\T\January1929-February1929\ Scan180 | |
| Date | 22th February 1929 | |
| HS.{Lord Ernest Hives - Chair} FROM DA.{Bernard Day - Chassis Design} Copy to BY ORIGINAL DA{Bernard Day - Chassis Design}1/M22.2.29. DASHBOARD PUMP. X3806 We thank you for HS{Lord Ernest Hives - Chair}/GY2/LG19229. We note that the use of a spring enables the valve to be opened .125. Would you please allow for this opening on the two schemes shewn on figs. 2. and 3. (whichever you decide to use.) It is possible however that the sleeve stop shewn on the fig. 2. scheme is not really necessary, and that your suggestion of the spring under the nut stopping by shutting choc-a-bloc will be satisfactory for this very light duty job. As was recently shewn on the petrol cock, in spite of the low velocity part of the resistance to filling is due to velocity head and a slight increase in the dia. is nearly sure to make a very great difference. DA.{Bernard Day - Chassis Design} | ||