| Author | Message | ||
     Davegess |
Court, I told you that Vicki was gonna get into trouble raising all those pigeons. Now look what she has done. She'll probably blame it on Jack. | ||
| Svh |
As I flew last week a business associate and I were talking about this and why no one has developed some sort of device to allow the necessary amount of air but also keep birds out. Maybe this will expedite the process a bit. Thankfully no one was hurt | ||
| Froggy |
Glue a few XB cheese graters together and put them in front of the engine? | ||
| Crusty |
NO Capes! | ||
| Court |
Amazing! | ||
| Bcool83 |
As I flew last week a business associate and I were talking about this and why no one has developed some sort of device to allow the necessary amount of air but also keep birds out. Maybe this will expedite the process a bit. Thankfully no one was hurt It's almost irrelevant. How many times do you think an airplane flies through an entire flock of birds? Not too often. Jet engines are designed and tested to injest birds (turkeys, actually - large birds) and ice. Very rarely would a whole flock of birds be dumb enough for whatever reason that it would fly in the path of a jet; adding a "bird strainer" of sorts would just add weight and aerodynamic challenges that were unnecessary 99% of the time. | ||
| Reepicheep |
The lack of a "bird strainer" is all about weight. If it is big enough to withstand the impact of an 8 pound goose at 300 MPH, it would have to be insanely heavy. If it was less then that, and you did hit something big, you are then ingesting not just a goose, but lots of parts of bird strainer. Takeoff and landings are the worst times for a bird strike, they are lucky to be alive. I am amazed it took out both engines though (if indeed it did). If it was just one, they shoulda had GE-90's on that airbus, they could have lost one engine and still gained altitude with the other (at half power, climbing straight vertical  ). They actually certify the jet engines by shooting chickens into them with pnuematic cannons. The engine has to take "A" strikes from "B" birds and continue to run for "C" seconds at "D%" power. The idea is that your engine was a goner, but would live long enough to either finish the landing, or get you far enough up on takeoff that you can get pointed back at a runway. And yes, we did thaw out the chickens.  | ||
| Svh |
I knew of the ability to ingest and spit out without damage. That was the same conclusion we came to that it would just be too cumbersome. Great job by the pilots and also the passengers for staying "calm" to allow everyone to be saved. | ||
| Moxnix |
This from France: "Simone used to be an aeronautical engineer; she worked on the development of the Airbus - the plane that just went down in the Hudson River. "It's safer for them to do a crash landing on water," she explained. "Less of a risk of fire. And it takes a while for them to sink…(Airbus has a "dip switch" that closes airframe openings for a water landing--moxnix note)...so you have time to get out. "When you land or take off, there is always the risk of birds getting in your engines. When I was at Airbus, we conducted extensive tests…in which we threw chickens into the turbine engines to see how many they could take. They had to be free-range chickens…the others are too soft. Trouble with birds is that they tend to flock together… but I don't remember how many chickens an Airbus turbine can handle before it stalls." | ||
| Ulynut |
Now PETA has another thing to protest. | ||
| Old_man |
Picture a grate in the shape of Madonna's pointy bra. I think this would work. | ||
| Blake |
Like the F117 except pointy? That might work, but it might also just pre-strain the unlucky fowl and reduce engine efficiency by obstructing airflow. But somehow I doubt that the stealth fighter's radar absorbing engine inlet shield is designed to withstand goose strike. Imagine the structure required to withstand a 10 LB mass of goose impacting at 300+ MPH. Kinetic Energy = 1/2mV2, so the 10 LB goose impacting at 300 mph equates to just over 30,000 FT*LBs of energy, nearly three times the impact energy of a .50 caliber sniper round. The math is... 300 MPH Goose KE = 1/2 (10/32.174) (300*5280/3600)2 The 32.174 divisor being the acceleration due to gravity that transforms pounds force into units of mass; the 5280 multiplier transforming miles in MPH to feet (5280 FT/Mile), and the 3600 divisor transforming hours in MPH into seconds (3600 seconds/hour). Coincidentally a 10 LB goose impacting at 300 mph has the same energy as a 500 LB motorcycle impacting at 30 mph. | ||
| Carbonbigfoot |
They actually certify the jet engines by shooting chickens into them with pnuematic cannons. The engine has to take "A" strikes from "B" birds and continue to run for "C" seconds at "D%" power. The idea is that your engine was a goner, but would live long enough to either finish the landing, or get you far enough up on takeoff that you can get pointed back at a runway. And yes, we did thaw out the chickens. I always wanted that job... Makes a potato gun look like a straw and a wad of paper! Rob | ||
| Birdy |
Bird strikes happen to any airplane. Here's a link to a F 16 on take off. Yep they punched out no something the folk could have done in NY. http://www.youtube.com/watch?v=zN_Zl64OQEw |
