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).
Modifications to the cooling system of the 40/50 Armoured Cars to address water loss.
| Identifier | ExFiles\Box 180\M1\6\ img010 | |
| Date | 6th December 1921 | |
| BY Copy to H.R. J.S. 40/50 ARMOUREDS ORIGINAL 2. 6.12.21. RE ARMOURED CARS. X4195 I am quite agreeable to the tall radiator cap for the above, but have no faith in its efficiency. My impression is that we should:- (1) fit a larger tank running backwards. (2) remove the thermostat which cannot help the cooling. (3) ascertain exactly how it is that water is thrown out as water and not lost as steam. (4) increase the fan in size, if possible, keeping same top velocity as the higher speed one. Sole fault with our cooling system is that which results in loss of water, as water and not as steam. Boiling is so occasional and for such short duration (as far as we know) that the quantity of water lost as steam is quite small, whereas a larger and heavier radiator would have disadvantages. Get Hs.{Lord Ernest Hives - Chair} to try larger top water pipe to see if this reduces water loss in the same way as large tank should do, i.e. give time for separating steam from water which ought to be able to return. This loss of water is like priming in a steam boiler when it sends water down the steam pipe. contd. [STAMP: RECEIVED] | ||