by Renegadenemo » Thu Jan 26, 2012 1:49 am
It's always amazed me that they stuck the LP boost gauge where Donald couldn't see it, especially as early documentation for the Orph' conversion mentions fuel tank pressurisation as used on the Gnat and yet it was never employed on the boat, so they must have known they were stepping away from what was tried and tested. Knowing what we know now about how fuel was delivered to the HP pump it seems likely that putting the gauge in the cockpit would have been of great value and all it would have taken was another three feet of capillary tube and an extra hour's work. What were they thinking!
My best theory is this. They did put a LP warning light on the instrument panel and perhaps they deemed this enough to warn Donald. After all, the rebuild manual states that, 'contacts close on a falling pressure at 25psi, +/-2psi', so that ought to have flagged up any serious problem.
But we tested the switch late last year and found that it closed at only 3.5psi. Now this may have been due to years of neglect but nothing about the switch, mechanically, suggested that this was the case... Do we have another hole in the Swiss cheese?
I'm only a plumber from Cannock...
This is not put on as a public entertainment... it's put on to reach a certain goal.