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Old 09-22-2022, 04:19 PM
  #17  
jackdiazccs
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Originally Posted by alasdair
Yes Jack, that's a possibility. And yet it happened only when airborne.
If the vent were restricted, and the engine on power were sucking in the header tank and main tank, then when closing the throttle I would get that result, flameout. Now that you mention it, that happened on another model once when I forgot to remove the bung on the vent pipe.
The time it didn't happen on this seaplane was the second last flight when I very very slowly reduced power, and landed with just a trickle of power, and airbrake deployed.
However it didn't happen when I tried to reproduce the fault on the ground, even snapping the throttle shut from high power.
But still, I'll check the vent.
Thanks,
Alasdair

Alasdair, I didn't point out specifically the vent as the source of the restriction . I meant that the restriction could be anywhere between the vent and the pump.
It is a system made by components connected in series; so, the restriction can be anywhere (or everywhere )
The amount of collapse of the UAT will give you an indication of how much flow resistance you have.

Jack