Hi Justin Just on your comment :
"... 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...." I am pretty sure that it is not actually possible to do that. You may not be aware that there is a vent built into the wing to allow air to enter the tank as the water is dumping. It is not a valve, it is an open vent. If the ballast tank is empty and there is a change of pressure in the tank then air will enter or exit via that same vent should the dump valve be closed. ROSS ____________________________________________________________________________ _____________ -----Original Message----- From: Aus-soaring [mailto:[email protected]] On Behalf Of Justin Couch Sent: Saturday, 23 April 2016 8:15 PM To: [email protected] Subject: Re: [Aus-soaring] Fwd: Re: Fun with Form 2 Inspections and paperwork 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. -- Justin Couch <http://www.vlc.com.au/> http://www.vlc.com.au/ Java 3D Graphics Information <http://www.j3d.org/> http://www.j3d.org/ LinkedIn <http://au.linkedin.com/in/justincouch/> http://au.linkedin.com/in/justincouch/ G+ WetMorgoth ------------------------------------------------------------------- "Look through the lens, and the light breaks down into many lights. Turn it or move it, and a new set of arrangements appears... is it a single light or many lights, lights that one must know how to distinguish, recognise and appreciate? Is it one light with many frames or one frame for many lights?" -Subcomandante Marcos ------------------------------------------------------------------- _______________________________________________ Aus-soaring mailing list <mailto:[email protected]> [email protected] <http://lists.base64.com.au/listinfo/aus-soaring> http://lists.base64.com.au/listinfo/aus-soaring
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