SouthRebels From , joined Dec 1969, posts, RR: Posted (13 years 6 months 1 week 6 days 6 hours ago) and read 2628 times:
I was just wondering if anybody has been involved in an emergency evacuation. Does anyone know the specifics of the evacuation methods on the upper deck of a 747? Also, how long, if at all, would an A/C float after a ditching?
KonaB777 From , joined Dec 1969, posts, RR:
Reply 4, posted (13 years 6 months 1 week 3 days 6 hours ago) and read 2403 times:
I've never been involved in an evacuation.
The 747 upper deck escape includes a door on either side of the UD (300 & 400), with a huge slide. This is the primary exit, with the backup obviously down the stairs & out a main deck exit. On the old 747s with the small upper deck, there is a very small door with a slide, but it is a backup. The primary exit is down the stairs.
A/c train From United Kingdom, joined Jun 2001, 501 posts, RR: 4
Reply 5, posted (13 years 6 months 1 week 3 days 5 hours ago) and read 2377 times:
Dont know about 747 UD evac, but I would say that most pod mounted engines wouldn't float although I would say the comet might, Jet engines are huge water vacuums just as with air, ' aerodynamics of air same as water' I would say after speaking with many experts chances of landing and floating on water, very unlikely, there is probarbly someone who could elaborate on this.
Oldman From United States of America, joined Sep 2006, 0 posts, RR: 0
Reply 6, posted (13 years 6 months 1 week 2 days 22 hours ago) and read 2326 times:
I had one planed ditching betweed MIA and Cuba many years ago in a C46 if you know what that is. Loaded with cargo and fuel and a new left engine that lost oil pressure and would not feather on shutdown. Weather was CAVU and we set her down in calm seas next to the good old USA Coastgurad Cutter "Milinda" The F/O and I walked to the exit window in the cabin, walked out to the wing tip and stepped into their little motor launch. Never got my shoes wet and was given the one of the best meals onboard during our return. The C46 sank in about 12 minutes. The name of the Airline was Zantop. Keep the tail behind you!
Twotterwrench From , joined Dec 1969, posts, RR:
Reply 8, posted (13 years 6 months 1 week 2 days 18 hours ago) and read 2240 times:
They claim that the CV-580 can be successfully ditched and stay afloat as long as you don't open the MED and stairs. Don't know if I want to try and prove it though. General argument I have heard is that a high wing acft such as the DASH 8 or ATR will not float due to the high center of gravity vs the water line while low wing acft stand a better chance. Mind you, this is lunch room hangar bs for the most part. I can't prove any of it... althought he CV-580 part I got from a guy who knows more about that plane than the guys that built it.
242 From United States of America, joined Oct 2000, 498 posts, RR: 1
Reply 9, posted (13 years 6 months 1 week 2 days 18 hours ago) and read 2231 times:
Every transport aircraft I've had experience with have all had spring loaded fuselage drains located at several locations along the belly. These drains are spring loaded open when the plane is not pressurized to allow any fluid (water, fuel, hyd fluid, lav juice etc..) to drain. They automaticly close when the aircraft is pressurized.
Now, assuming the aircraft remins intact during a ditching, the second cabin pressure is equalized, the drains will open and allow water in. Yes, the plane may bob around for a few minutes, but I guarantee it'll sink straight to the bottom soon thereafter.