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).
Description of a petrol hand pump system and its advantages over other arrangements.
| Identifier | ExFiles\Box 31\3\ Scan010 | |
| Date | 6th January 1915 guessed | |
| Wor{Arthur Wormald - General Works Manager}/EH2/L6115. Sheet. 2 When the hand pump is worked and it is connected to the induction pipe the pressure closes the non-return valve and forces the petrol which is laying in the pipe into the induction, as soon as the pressure drops the pipe fills up again and it can be repeated. The advantages I claim for this over either the syringe or the Peerless arrangement are :- (1) The petrol is never taken into the pump and this ensures that the pump will always be in good working order. The biggest drawback with the other arrangements is that the petrol hardens the leather washers and makes them useless. (2) It will always be ready for use and can be worked without lifting the bonnet. With a syringe unless a spare tin is carried it is very difficult to obtain any petrol from the car. (3) It will add only very little weight, and will not be expensive to fit and it does not interfere with the standard arrangements on a car. (4) The mixture delivered into the pipe will be approximately always the same strength, if the pump is worked very rapidly so that the petrol had not time to fill up it would be weak but this would not be disastrous. One might say that it is a small measuring carburetter, a fixed quantity of petrol and air is pumped into the pipe each stroke of the hand pump. The non-return valve which admits the petrol has not got much to do, supposing if it leaks the pressure will only disturb the petrol in the float chamber and mean more strokes of the hand pump. It is practically foolproof, the only thing that can happen is that if the tap on the induction pipe is opened when the engine is running | ||