Water is pumped from the harbour to a header tank and then fed by gravity to the high pressure pumps, where it is pressurised thence raising the external hydraulic accumulator.
32.
The three cylindrical main petrol tanks were slung under the floor in an aluminium fairing, and fed fuel via windmill-driven pumps to header tanks on the underside of the upper wing.
33.
As for other Thornycrofts the radiator surround was a massive casting ( in aluminium, to save weight ) topped by a brass header tank with the " Thornycroft " name prominently cast into it.
34.
The header tanks were located in the outer wing panels ahead of the main firewall at the back of the engine compartment, and into the usual coolant intakes located at the top rear of the engine.
35.
There was a small bulge on top of the cowling for the coolant header tank and the radiator was placed in a tunnel fairing between the undercarriage legs, with a pair of shutters for coolant temperature control.
36.
From about mid-1940, 73 pounds ( 33 kg ) of armoured steel plating was provided in the form of head and back protection on the seat bulkhead and covering the forward face of the glycol header tank.
37.
Rain water was channelled by gutters from the roof to a large storage tank to the north of the building from where it was daily pumped by hand into a header tank and gravity fed to taps.
38.
:: : : : : : : More generally, a header tank is any tank that stores the fluid you want to pump at a height above the point where you want to pump it, that is, it provides head pressure.
39.
The company saw a need for a cheap low-powered propulsion unit for ultralight aircraft and the engine was an adaptation of the well-proven and reliable head variants, one with an'L'shape, the other with a low-profile flat head which required a separate header tank.
40.
A local landmark is the finely worked stone water pumping station and reservoir located on Grantham Road, known locally as'The Water Tower', as opposed to the white'Hospital water tower', a header tank for the hospital laundry boilers another prominent landmark, now demolished in 2014.
