04-03-2019, 09:11 PM
I'm certain I have seen a photo of a Seven racer at Brooklands in the 1920s fitted with a Rotherham air pump which presumably was used to pressurise the fuel tank. These were commonly used on aircraft of the First World War for that purpose. Here is a photo of one.
Pump_3_w.jpg (Size: 9.84 KB / Downloads: 153)
Pump_3_w.jpg (Size: 9.84 KB / Downloads: 153)