Originally Posted by
Mogwi
Well, this is news to me! No one ever mentioned a “dump valve” in the Harrier fuel system in all the 2000+ hours I spent flying it. The only “dump valves” to my knowledge were those used in the fuel jettison system - and one pilot proved that those were not wired through the weight-on-wheels switches - oops! Perhaps I didn’t pay enough attention in groundschool. Mog
As an ex Harrier engine guy, this also surprises me! I'd be interested to see a schematic if one exists - it doesn't appear here:
https://www.dowtyheritage.org.uk/con...pegasus-engine