On 23/04/2016 2:30 AM, Jim Staniforth wrote:
Can a pilot tape over the dump holes to reduce noise, or is that a breach of contract?
I'm pretty sure some tape over the holes would be fine - plenty of gliders with underwing dump valves have a little mylar or rubber flap over them for fairing purposes - our club DG1000 does. I've seen tape plenty of times over the Jantar dump outlet too for the same reason.
I can't say for 100% coverage, but the flight manuals of gliders that I've read state that the tanks should be left open if flying without water. Obvious reason for this is to prevent the pressure change splitting the wing open at altitude. A bit of tape won't hold much pressure behind it so the manufacturers instructions are still being obeyed anyway.
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