Plane Answers: Takeoff speeds, weights and lavatory drains

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5-21-2008 @ 2:09AM

Greg Marino said...

Sorry fellers...Not a lavatory/galley drain in action but indeed a fuel purge or surge valve doing it's natural act from an APU.

Hope i didn't ruin anyones day...

Greg

5-21-2008 @ 8:16AM

No sweat, Greg. If I'm wrong, I want to know about it.

But have you noticed the heated water drain masts that occasionally have water pouring from them on the ground (especially fun when you're doing the walk-around). Are you suggesting that this sink drain water is diverted and held inside while in flight?

Since the APU isn't running usually halfway across the pond, and the main tanks vent out close to the wingtips, I'm not sure I'm sold on the fuel purge.

If you feel ambitious, let me know what you find.

Thanks!

Kent

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