Magic48 From Switzerland, joined Jun 2005, 43 posts, RR: 0 Posted (7 years 1 week 2 days 9 hours ago) and read 14572 times:
Quote: Hokkaido International Airlines, the Sapporo-based carrier known as Air Do, said Tuesday that birds hit one of its Boeing 767 aircraft in midair Monday night, leaving a hole in one of the plane's main wings.
According to the airline, the two-engine jet, which had left Tokyo's Haneda airport, was about to land at Sapporo's New Chitose Airport around 8:45 p.m. when birds collided with its right wing, creating a hole about 30 centimeters wide.
No one was injured in the incident, but it caused Air Do to cancel a total of 15 flights between the two cities, the carrier said.
MD80fanatic From United States of America, joined Apr 2004, 2623 posts, RR: 11 Reply 5, posted (7 years 1 week 2 days 5 hours ago) and read 14019 times:
You mean to tell me there is a bird that exerts more point force than structural steel? Tell me it isnt so.
DLKAPA From , joined Dec 1969, posts, RR: Reply 9, posted (7 years 1 week 2 days 4 hours ago) and read 13805 times:
Quoting Litz (Reply 3): That's actually eerily similar in size to the big hole the foam caused in Columbia's leading edge ... speed of impact was probably similar as well.
If the speed of impact was the same then Columbia would have never made it out of the atmosphere. Earth's escape velocity = 11.2 km/s, or 1.12 x 10 4 m/s. The speed of a 767 flying at an altitude low enough to hit a bird is probably around 250KIAS, which works out to 0.138 km/s, or 1.38 x 10 2 m/s. Bit of a difference I think.
EMBQA From United States of America, joined Oct 2003, 9286 posts, RR: 13 Reply 10, posted (7 years 1 week 2 days 4 hours ago) and read 13779 times:
Some where on the net is a series of pictures of an American 767 that hit some birds while departing out of LHR I think. One bird went clean through the radome, the pressure bulkhead, through the glareshield and ended up in the Captains lap.
"It's not the size of the dog in the fight, but the size of the fight in the dog"
Prebennorholm From Denmark, joined Mar 2000, 6019 posts, RR: 55 Reply 11, posted (7 years 1 week 2 days 4 hours ago) and read 13689 times:
Quoting DLKAPA (Reply 9): If the speed of impact was the same then Columbia would have never made it out of the atmosphere. Earth's escape velocity = 11.2 km/s, or 1.12 x 10 4 m/s.
Columbia never reached Earth's escape velocity. If it had done that, then it would never have crashed, but entered an eternal orbit around the sun.
It reached Earth low orbit velocity which is some 7.9 km/s.
But the speed when the foam hit the wing was much, much lower. It happened within the atmosphere. Columbia left the atmosphere (for all practical things) going around Mach 3 which is only 0.9 km/s at high altitude.
I don't know at what speed it happened, but it could easily have been at subsonic or low supersonic speed.
But then Columbia was a lot more fragile. Flying it on top of the B747 carrier at just 250 knots though a rain shower would totally destroy the thermal protection.
Always keep your number of landings equal to your number of take-offs, Preben Norholm
Alias1024 From United States of America, joined Oct 2004, 2644 posts, RR: 2 Reply 12, posted (7 years 1 week 2 days 1 hour ago) and read 13350 times:
Quoting Bobster2 (Reply 8): It has to be translation error. They must have meant 30 cm dent, not a hole.
Birds leave holes if they and the aircraft are going fast enough, or the bird hits in a weaker area. I've seen pictures of a Piper Seminole that had a run-in with a large bird (i think it was a turkey vulture) while in flight. The bird entered the top of the wing, and went clear through, leaving about an 24 inch diameter hole on the right wing.
It is a mistake to think you can solve any major problems with just potatoes.
CRGsFuture From United States of America, joined Jan 2006, 536 posts, RR: 0 Reply 14, posted (7 years 1 week 2 days ago) and read 12851 times:
Can I ask, why is it so tough to comprehend a hole produced by the bird? Laws of physics could easily tell you that this was to happen if the conditions are right.
Flying you to your destination; your girlfriend to her dreams.
B777fan From United States of America, joined Oct 2004, 143 posts, RR: 2 Reply 15, posted (7 years 1 week 2 days ago) and read 12818 times:
Quoting Prebennorholm (Reply 11): I don't know at what speed it happened, but it could easily have been at subsonic or low supersonic speed.
Not only that, but the foam was moving at the seem speed until it detached.
The relative speed at impact was even lower. I don't recall exactly, but I think the relative impact speed was in the 500 to 600 mph range. I might be low, but that is still fast enough to have caused the damage.
Ckfred From United States of America, joined Apr 2001, 4656 posts, RR: 1 Reply 17, posted (7 years 1 week 1 day 23 hours ago) and read 12285 times:
In 1995, a very severe thunderstorm hit DFW, and a number of AA jets were grounded, due to baseball and even larger hail damaging planes on the ground. A common problem was hail going through composite surfaces on the wings and horizontal stabilizers.
On the other hand, the DC-10s and 727s on the ground only suffered dents, since they had more metal surfaces.
TWAtwaTWA From United States of America, joined May 2006, 141 posts, RR: 0 Reply 19, posted (7 years 1 week 1 day 23 hours ago) and read 11950 times:
This comment relates to the above since it involves birds and planes...
I remember watching a documentary on the development of the B777, and it also featured the design and testing of the giant GE engine. There was a clip of the engine, mounted in test mode, at full power. In order to test the strength of the fanblades and ability of the engine to continue running in adverse situations, many items were chucked into the engine, including ice, small bushes, and even large (dead) birds. It was very entertaining to watch the engines easily consume multitudes of birds, while showcasing their impressive uninterupted function.
StealthZ From Australia, joined Feb 2005, 5433 posts, RR: 49 Reply 24, posted (7 years 1 week 1 day 18 hours ago) and read 9794 times:
Quoting Saintsman (Reply 22): Quoting MD80fanatic (Reply 5):
You mean to tell me there is a bird that exerts more point force than structural steel? Tell me it isnt so.
Type 'Bird Strike' into google images for the answer to that.
While you are there check with boeing.com and look for how much "structural steel" there is in the average B767!
If your camera sends text messages, that could explain why your photos are rubbish!
25 AmericanB763ER: Don't know if this is the incident that you mentioned but a very similiar one involving an AA 763 is to be found here I flew on N376AN in 2005 I migh
26 Bphendri: Was it a North Korean bird? You gotta watch out for those things, they are from a secret anti aircraft bird breeding laboratory.
27 MD80fanatic: DING DING DING - We have two partial winners !!!!! Firstly, I know very well how to use Google, thank you. Secondly, I have a pretty good idea how mu
28 MotorHussy: Great headline, love it! "Leave Hole in Main Wing." as opposed to the Boeing 767's not so main wing or lesser known and carefully concealed other wing
29 StealthZ: Ah, doesn't take long for someone to bring sad day back into the story. Making a hole in the skin of a wing is hardly the same as the structural part
31 MD80fanatic: Sorry for the tone of my last post. The other thread is wearing on me. Still though the comparison does not deserve to be glossed over and forgotten.
32 Jetflyer: Except that the 767 doesn't go into space nor has to re-enter the earth's atmosphere at thousands of miles an hour.
33 Miamiair: Had a DC-10 slat that got punctured by a bird two weeks ago. Hole was 19" X 13". Swapped the slat out at is would take too long to repair. A few bird
34 Linco22: Big Bird from Sesame Street by the sounds of it.....
35 Dizzy8: Do we classify this as a "near miss", a "near hit", or "loss of separation with an avian projectile?" (We'd better check those orange black boxes.)[Ed
36 HAWK21M: Presume it would be the Leading Edge Slat area. The report does not state which part of the Right wing. regds MEL
37 MOW: Here, have a look. According to Japanese TV several birds hit the aircraft.
38 A342: The main wing is the wing, and the other wing they could have meant is the horizontal stabilizer. End of story. ??? I'm not sure I get what you wante
40 ComeAndGo: Some migratory birds fly at cruising altitude. At 600 mph they'll do plenty of damage.
41 Bphendri: When will those darned birds ever learn RVSM!!! Just goes to show, you can't teach old birds new tricks! And it could not have been a goose, otherwise
42 PurdueAv2003: I had this discussion with my sister, a DVM, this weekend: Why do we refer to "birds hitting the aircraft" when in reality it is the aircraft hitting
43 Scouseflyer: I remember as a teenager I was a member of the RAF cadets and on camp one year helped out at the RAF Hawk (sub-sonic jet trainer) maintenance facity i
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