Grozzy From Australia, joined Oct 2007, 155 posts, RR: 0 Posted (5 years 2 months 2 days 21 hours ago) and read 20930 times:
I cant remember when or by whom, but when I was young someone told me not to flush the toilet while sitting down on a plane. The suction would cause you to become stuck. Not that I do it with any toilet, but is there any realistic hazard? Also should there be a warning for fat-bottomed passengers?
N104UA From United States of America, joined Dec 2007, 897 posts, RR: 0
Reply 3, posted (5 years 2 months 2 days 20 hours ago) and read 20792 times:
Actually Myth Busters did this and if you are heavy enough and it is an older a/c this can happen, now since this has come about the seat is raised about 1.5 cm to allow another way for air to get in as to not create a vacuum but in older a/c, not many still flying there is not the 1.5 cm gap
"Learn the rules, so you know how to break them properly." -H.H. The Dalai Lama
Pilotpip From United States of America, joined Sep 2003, 3136 posts, RR: 11
Reply 7, posted (5 years 2 months 2 days 18 hours ago) and read 20600 times:
It's actually more likely on newer aircraft like the 170/190 and A320s which utilize a vacuum system rather than blue juice.
I would highly suggest against sitting while flushing a lav in the 170 in cruise. We had a pax get stuck on one for a while and require some assistance getting unstuck. And this is why you could never pay me enough to be a flight attendant.
MerlinIIIB From Norway, joined Aug 2005, 120 posts, RR: 0
Reply 8, posted (5 years 2 months 2 days 16 hours ago) and read 20373 times:
A person got seriously stucked on a Norwegian train in the late 1980s. The vacuum was so effective that the fire brigade had to work for quite some time to release her. It made big headlines here, and I hope they re-designed it. Alternative path for air flow should prevent this from happening.
Yflyer From United States of America, joined Feb 2007, 931 posts, RR: 1
Reply 23, posted (5 years 2 months 2 days 6 hours ago) and read 17970 times:
Quoting N104UA (Reply 3): Actually Myth Busters did this and if you are heavy enough and it is an older a/c this can happen, now since this has come about the seat is raised about 1.5 cm to allow another way for air to get in as to not create a vacuum but in older a/c, not many still flying there is not the 1.5 cm gap
I remember that episode, but I don't remember them coming to that conclusion (though it has been ages since I've seen it). What I do remember is:
1) It's impossible if you're sitting on the actual toilet seat, like most people would. Since there's a gap between the seat and the rim of the toilet there's no way to form a seal.
2) (If I remember correctly) They demonstrated that even if you did sit down without putting the seat down, it would still be rather difficult to form a good enough seal to get you stuck to the seat, since regardless of how large you are there will always be gaps in places such as between your legs or yout butt crack.
BTW, I'm not sure what you mean by older aircraft. I'm pretty sure the toilet they used for their tests came from an old DC-9.