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).
Testing and optimal operating temperatures for car shutter thermostats and louvres.
| Identifier | ExFiles\Box 39\4\ Scan123 | |
| Date | 1st May 1930 | |
| X3499 E.{Mr Elliott - Chief Engineer} Hs.{Lord Ernest Hives - Chair} ) FROM R.{Sir Henry Royce} GY. ) (At Le CanadelHenry Royce's French residence) R1/M.1.5.30. C. to Sg.{Arthur F. Sidgreaves - MD} Wor.{Arthur Wormald - General Works Manager} C. to Rg.{Mr Rowledge} Bv. Da.{Bernard Day - Chassis Design} X7250 X3499 CAR WORK. THERMOSTATS FOR SHUTTERS. (IN CONTINUATION OF R2/M30.4.30) The unit bellows should each be tested by making them lift 20 lbs. to open, then they should commence to operate at 50/55°C. and be fully open at 65/70°C. by stretching themselves against atmosphere, stiffness of the bellows, and the same 20 lbs. (E's estimate of the shutter friction at bellows stroke). Then they should have the load reversed - 20 lbs - (i.e. trying to stretch them and cooled down, when they ought to close at 40/45°C. The whole cycle would take about 30°C - less preferred - and average 55/60°C = 131/140°F.{Mr Friese} I am convinced that unless we keep the temperature low we shall have more complaints of water boiling - than with hand controls. Even then we shall be at a disadvantage during hot weather, when the shutters should be always fully open. The present temperature of 75/80°C. is too high, and I think unnecessary with Phantom 2 as stated above. Louvres for warm climates are necessary. Can we try some horizontal ones, which are better for appearance and sound, and one cannot see through. R.{Sir Henry Royce} | ||