the engines are running which have big dealybobs called 'compressors'
The engines ARE the compressors. The first stage in a jet engine is a compressor -- it's those blades you see from the front. Air goes through them, then into a combustion chamber where fuel gets squirted in and ignited -- but some of the air gets bled off before getting there.
That air goes into an assembly called an air conditioning pack, or just "pack", where some thermodynamic trickery involving turbines and heat exchangers cools it from several hundred degrees F to a nice cabin temperature and lets it out into the cabin.
Near the tail of the airplane there's an assembly called the outflow valve that senses the cabin pressure and dumps air overboard at just the right rate to get the pressure the crew has selected.
The turbine itself was wired against tampering. All the bolts had little wires threaded through the heads that were then attached to the component the bolt was used in.
Those are called safety wires; they prevent bolts and nuts loosening under vibration. You'll find them all over an airplane, too.
If you were in a tampering mood, you'd need some super high-tech equipment to get past those wires: a pair of diagonal cutters and a coil of safety wire.
...we've had flapping-wing aircraft for three-quarters of a century.
Birds flap their wings with a painfully inefficient reciprocating motion, because nature doesn't know how to make one critical component: a rotating joint. We do, so our wing-flappers flap their wings with nice, efficient rotary motion...and we call them helicopters.
I'd say piracy has been pretty good to B&N...go over to the computer section and count the books on how to use the copy of Office, Photoshop or AutoCAD you just downloaded.
Precisely. To refine that a bit, one can add up the heights of all the colored bars in Fig.2 to find that about 1.6% of cars from the 15 most popular makes were stolen. 1.6% of 109 is 1.7 cars, still not an outlier -- it would still take just one theft to break the perfect record and one more to make the pink cars look theft-prone.
One would wonder how the hell our ancestors managed to survive without living in a surveillance society.
Well, if you can't come up with a better counterargument than "Homo Habilis survived without it", you're going to have a traction problem. You could argue against shitting downstream of the well with that line.
I think most helium is produced by stellar fusion of hydrogen.
Most helium, yes. Most helium used on Earth, no.
Nearly all the helium produced in the twentieth century came from the ground under Amarillo, Texas where it was created by fissioning of alpha-emitting ores. This near-monopoly on helium, and Germany's deployment of military airships in WW1, resulted in an embargo on helium which explains why the Hindenburg was inflated with hydrogen.
AFAIK, Amarillo is the only city in the world that has a monument to an element.
Slashdot Mirror
rj
The engines ARE the compressors. The first stage in a jet engine is a compressor -- it's those blades you see from the front. Air goes through them, then into a combustion chamber where fuel gets squirted in and ignited -- but some of the air gets bled off before getting there.
That air goes into an assembly called an air conditioning pack, or just "pack", where some thermodynamic trickery involving turbines and heat exchangers cools it from several hundred degrees F to a nice cabin temperature and lets it out into the cabin.
Near the tail of the airplane there's an assembly called the outflow valve that senses the cabin pressure and dumps air overboard at just the right rate to get the pressure the crew has selected.
rj
Those are called safety wires; they prevent bolts and nuts loosening under vibration. You'll find them all over an airplane, too.
If you were in a tampering mood, you'd need some super high-tech equipment to get past those wires: a pair of diagonal cutters and a coil of safety wire.
rj
Chemistry set? Hell, the one I lusted after was the A. C. Gilbert Atomic Energy Lab. Never got it.
rj
...we've had flapping-wing aircraft for three-quarters of a century.
Birds flap their wings with a painfully inefficient reciprocating motion, because nature doesn't know how to make one critical component: a rotating joint. We do, so our wing-flappers flap their wings with nice, efficient rotary motion...and we call them helicopters.
rj
...as opposed to repeatedly writing on a blackboard and erasing as you go?
rj
Only primitives beat tom-toms to make the sun return. The rest of us sound horns to clear traffic jams.
rj
Oh, jeez, the "rocket fuel" BS again. Might want to read this:
http://www.airships.net/hindenburg/disaster/myths#flammable-cover
rj
I'd say piracy has been pretty good to B&N...go over to the computer section and count the books on how to use the copy of Office, Photoshop or AutoCAD you just downloaded.
rj
rj
In late-breaking news, statisticians find that 8.2% of car thefts occur in June.
rj
Kindly look up the definition of "in kind" and write it twenty times on the blackboard, Bart.
rj
Might want to google "Thirty Years' War", "Hundred Years' War" and "Crusades"...
rj
And with dead-tree books going away, he may not have anything to put under the front of the projector...
rj
Well, if you can't come up with a better counterargument than "Homo Habilis survived without it", you're going to have a traction problem. You could argue against shitting downstream of the well with that line.
rj
Oh, yes. We could organize a federal agency to do that: call it the Drug Enforcement Administration...the dealers wouldn't have a chance against THEM.
rj
...they want their banana peels back.
rj
...remember we tried it with bats.
http://en.wikipedia.org/wiki/Bat_bomb
rj
No. They aren't trying to not make money: they're trying to "not make money". BIG difference.
rj
...folks on /. like to say "Who needs airline pilots? Those planes fly themselves."
rj
Which reveals the screenwriter as one of the dumb ones...
rj
In California, I suspect the Jackie Coogan Law would have kicked in to prevent the parents blowing the money...not in Florida.
rj
So, a sailboat is not wind-powered because it would still float if the wind weren't blowing?
AERODYNAMIC:AEROSTATIC=HYDRODYNAMIC:HYDROSTATIC, in SAT terms.
rj
Most helium, yes. Most helium used on Earth, no.
Nearly all the helium produced in the twentieth century came from the ground under Amarillo, Texas where it was created by fissioning of alpha-emitting ores. This near-monopoly on helium, and Germany's deployment of military airships in WW1, resulted in an embargo on helium which explains why the Hindenburg was inflated with hydrogen.
AFAIK, Amarillo is the only city in the world that has a monument to an element.
rj
Since we figured out that Arnaud Amalric offered a suboptimal solution.
rj