If I walk into the back, wring the neck of one chicken, pluck the carcass, and throw him in the microwave...then eat him...does the gross weight change? I'm wondering if the conservation of energy applies here.
errrr yes and no. Yes, the inital chicken liftoff would probably exert a downward force on the cabin which would temporarily cause an increase in aircraft weight. However that was not my original point.
My first point is this, when you fly an aircraft you are carrying the weight of air within then cabin as well. That air onboard has a weight that the aircraft feels. Back in high school science or chemistry class your lab teach probably had you weigh a flask that was open, and one that was evacuated. The open one weighed more. The same principle is in effect here.
When the chickens take flight they become part of the air mass. Therefore that means the airmass not only has its original weight, but that of the chickens. Now, this assumes that the chickens are simply floating in that airmass like a balloon. I guess you could get them to do this by pumping them full of Helium but they might explode, and that would suck.
In reality they need to flap their wings to stay aloft. This flapping forces some air downward which will strike the cabin floor and cause an increase in the weight (not mass) of the aircraft.
Of course the sharpie that I have been using for the last hour could be messing with my mind but I beleive I am correct (even if my reasoning is flawed). Afterall, if this were the case cargo companies would put all their stuff on little "hover palets" so that they could load more stuff on each flight.
Basically, there is no such thing as a free ride. Its the old every action has an equal and opposite reaction.
They can fly short distances; kinda like the Wright Flyer. It helps if they're perched atop a bucket or some other such object. Of course, we then wonder how the chicken got up there.
If Albie eats one of the chickens then I guess the trim moves forward a little. My computer doesn't have all the space-age advanced math symbols I'd need to illustrate that point. Of course, assuming there is another pilot, he/she would have to trim to keep up with Albie's journey through the cabin. Heaven forbid Albie might have to chase the chicken back and forth.
Next time on the Highway you see an 18-wheeler shedding chicken feathers, safely pull up alongside it, as long as it's a four-lane road, and check out the cages. They are equipped with compartments that hold just one or two chickens and thus prevent movement. The reason is that when chickens are frightened they will rush to one side of their area, smothering most of the other chickens. This eats into profits. Management, money-grubbing devils they are, has the afore-mentioned cages installed to prevent such catastrophes. You can rest assured, should you really haul a load of chickens some such restraint will be in the aircraft to prevent a premature mass death.
Has anyone here really hauled chickens in an airplane?? Is there any part of the country, unfit for the raising of these birds, that routinely has chickens flown in??
P.S. Does the CG change when Albie cooks his chicken. If he overcooks it, I have no clue as to his culinary skills, will the escaping steam change the air density in the cabin??
Back when I was flying freight, we had a run that went from Reno to Oakland twice a night on a Postal sub-contract for Evergreen.
The second return trip to Reno, once or twice a week, would be a full load (Metroliner III) of live baby chicks. They were pretty cute and I would sometimes peer in the boxes at them, and felt sorry for the little buggers having to ride as pax in a Metro. Anyway, one night I got curious enough to ask where all these thousands of baby chicks were going. As it turns out, there is a Huge reptile and exotic farms outside Carson City, and these little suckers were dinner for all the snakes and lizards and what not. After that I felt pretty bad. Like I said the were pretty cute.
Of course all that was pre-9/11. Now the poor pilot has to worry about those chicks hijacking the airplane and taking them somewhere where they won't be lunch. Not to mention the host of W/B issues, and aerodynamic considerations brought to light by this thread in regard to the dangers of carrying THAT MANY potentially a/c upsetting little chicks in the back. What with all that potential kinetic energy pent up back there looking for a way to escape their terrible fate...
How about hauling a load of helium filled balloons? Also, what happens to the balloons when you land and begin slowing the plane? Assuming they're not in individual cages and free to move around the cabin somewhat.
How about the one where two Aggies were landing an airliner at Easterwood?
They were cleared to land. It was a nice VMC day. The captain was flying and looked out front to the runway. "Runway's in sight", but he wasn't real comfortable with what he saw.
He asked the FO to give him flaps 10. Proceeding with the approach, he began to get more nervous. flaps 30 please. Landing gear down, etc...
They were on short final now. The FO was becoming a little nervous seeing how his Aggie buddy was really sweating this landing.
Captain asked for full flaps very emphatically. FO complied and kind of braced himself as they approached the runway.
They touched down as close to the apch end as possible. As soon as the wheels were planted on the ground, the captain stomped on the brakes, used all the reverse thrust they had, spoilers, everything... The plane just rolled to a stop just prior to running off the far end.
After a moment or two of regaining their composure, the Aggie captain said, "man, that was a short runway." The FO looked out each cockpit side window and said, "...yea, but wasn't it a wide one!"
Your thought about the fact that the chickens in flight inside the airplane would not increase the mass of the airplane, just the lift the wings of the airplane would need to make is interesting. Maybe there should be an alarm attached to the TCAS the goes off when you get a traffic alert. That way all the chickens would start flying and the airplane would be more maneuverable because of the lower mass.
Anyone want to figure out how much heavier a large airliner is pressurized verses unpressurized up at cruise? My guess is several hundered pounds.
Hmm, my chickens have never been very great at flying, and the odds of having them all in the air at the same time is slim to none!
FedEx does do a lot of animal charters and at Tigers we used to haul lots of animals, including chickens. Usually we hauled the baby chicks, though. Most of the FedEx charters are either zoo, seaworld stuff or cattle and horses.
Everytime I flew them I was reminded in good heartedness that each one was worth over $10,000.00!!!! (Pigs are used for heart valves at the mayo clinic)
Any way on the way from Columbus to Rochester, MN in my favorite Navajoe I climbed to 12000' (no headwinds. All was fine in the climb out (contray to the saying Pigs don't like to fly), they were making ALOT of noise. About 30 min into the flight I don't hear anything, 20 min. later it regestered what that might mean I turn around to find a dozen hypoxic pigs opps...
It was about that time I thought lower might be better for this trip. At 8000' the ride sucked and you know what... they didn't like the ride. All the pigs do is complain.
Hmm, we were always told that pigs are extremely sensitive to pressure changes, etc. We would keep the cabin under 5,000' or so and keep the pressure changes as slow as possible. Glad I always had 3 packs running with these animal charters, don't envy doing them in small stuff. We carry 180 head of cattle on the MD-11 at times, you need all the airflow you can get! We raise the cabin to 10k periodically to dump the old air and exercise the outflow valves and keep the temp down.
I read in Airliners Magazine once about a DC6 Capt. in the 50's flying a load of monkeys-they used their livers to make polio vaccine back then.Anyways,he hadda go back and hold a wrench on a bolt on the inside of the door while a mech tightened it from the outside to bolt it shut,due to a bad latch.With just enough room to squeeze by the cages,the monkeys decide to voice their displeasure by pooping in their hands and and flinging it at the poor Capt.,while he urged the mech to hurry.He derived a great deal of pleasure by relishing their fate.