Ok, have found the Diary bit you refer to. Hmm. A possible intermittent problem with 24V DC power - which runs the LP Boost Pump(s)....? I am not sure that's very likely. 24V DC also runs the Ignition Units, so 24V must be 'on' to start up - to light the flame, as it were. But after that, 24V is only running the LP Pump(s) and any Panel Indications - Air Pressure Warning and Low Pressure Fuel Warning are mentioned (as being 'on' - during Run 1 4Jan67), by DMC, I think...?rich1608 wrote: ↑Sun Aug 26, 2018 5:01 pmCould that flameout have been caused by a missing clamp screw in the battery connection panel? See under 'Rebuilding K7’s Wiring Loom and Electrical Systems – Part 1' in the Diary http://www.bluebirdproject.com/index.php?id=63
I really do not understand how K7's LP Fuel System was supposed to work, after the extra Tank & LP Pump were installed. Before then, I think the single LP Pump in the extra Tank under the Engine (the smaller L- shaped one - not the big Doughnut shaped on, around the Intake) sucked from its tank and fed fuel to the Engine Pump LP inlet....? So, the L-shaped tank got its Fuel from the Doughnut, via gravity or siphon....? Am unclear were the 2nd Aux Tank and 2nd LP Boost Pump were fitted, system wise.
Killing either of the LP Pumps would not be a problem immediately - the Engine Pump could still suck fuel. But the stopped LP Pump would prevent fuel getting through - so the tank it was in would run dry. Which would severely drop the Fuel Flow - and likely cause a Flame out.
Its possible - but to what degree would a not fully secure Battery Connection cause a loss of 24V DC....? Very difficult to say - and I think its unlikely. Very good spot though - and must remain a possible.
A Flame Out, btw, is literally that - the flame goes out (which is normally continuous). Usually due to lack of or shortage of fuel (strictly its Weak Extinction) - or additionally for K7, water in the front. Typically happens on a fast decel, from power. Another possibility (which is unlikely for the Orpheus) is a Compressor Surge - where air flow reverses and the flame is sucked/blown out of the front. Can melt your Compressor....