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It is okay for Bush to rant and threaten he will not be the one in the line of fire, I am constantly reminded of the words in a song written about the conflict in my homeland Ireland,and they go like this, those who give the orders are not the ones to die, it's the Pats.and the Brians and the likes of you and I.
Everyone is entitled to their point of view but no way can I justify the countless numbers who will die to get rid of a dictator, there has to be other ways to remove him and his hangers on.
Besides what about after he is gone,and who will replace him,if the mess in Afganistan is anything to go by not enough thought has been given to after, the people in Afgnistan are just as bad off as they were with the Taliban despite assurances to the contrary.
Cheers Pat.
brianV: I'm up in the Fort Collins/Loveland area. I heard it was 70 degrees just a week ago. Talk about timing!
Ken
I won't debate the definition of a glider, but I think that the shuttle wings do generate lift, otherwise it would fall like the brick it is often compared to. The lift generated simply does not (can not?) be much compared to its own weight.
A glider can generate more lift by gaining speed. But this is done by aiming lower towards the ground and letting gravity do the work. Can the additional lift gained in this way overcome the loss of altitude caused by flying lower? In the long run it simply cannot, otherwise we would have a version of a flying perpetual motion machine that gains altitude by diving towards the ground. A glider gains altitude by finding rising currents of air, either thermal updrafts or by a rising flow of air over a ridge, or range of mountains. Other wise it is losing (an average of) a foot for every 30 feet flown.
I'm not a pilot, glider or otherwise, but I do fly model gliders so I think I'm aware of the basics. But there is so much more to learn! If I'm not stating this correctly, please let me know (but I still won't accept a perpetual flying machine).
Regards to all,
Steve
The Navy is experimenting with perpetual motion undersea drones, that use buoyancy and various mechanical and hydrodynamic tricks to swim around pretty much indefinitely. As the craft rises and falls, various control surfaces convert some of the vertical motion into forward motion. I think there are small batteries for instrumentation and basic computer control, but that's it. Pretty cool stuff. I wish I could find the article that describes it all!
Craig
Always the spoils to the wealthy while the working class takes the bullet. Maybe not true in the American Revolution but in every war since.
Sadly,
Ed
There is a certain irony in just having reread the Richard Feynmann account of the investigation of the Challenger disaster. The engineers estimated risk of failure at about 1 in 100, the administrators at about 1 in 10,000. Guess who is right.
The impact of the Columbia failure has echoed around the world displacing local Australian news since it occurred. Coincidentally it followed a local train crash which killed seven but somehow, the image of astronauts/explorers risking their lives to push the bounds of knowledge, is a bigger tug at the heart. I now sort of understand the public upswellings of emotion over lost explorers; Livingstone (found) in Africa, Burke and Wills here in Australia, Franklin in the Arctic, Scott in the Arctic. I guess there are similar names in American exploration but somehow I think your astronauts will be the ones remembered.
Oddly, from the other side of the world, the catastrophe has a local angle. One of the experiments being undertaken on-board Columbia was an experiment in spider web strength being co-authored by a local finalising his doctorate in Materials Science and kids from the local high school. They were all waiting for the eight golden orb spiders to return so they could determine the tensile behaviour of spider silk produced under zero-g conditions. Apparently the experiment was going well and as predicted.
Poor kids are understandably upset, having seen the whole thing through over about 4 years and been there to see the launch. Wonder what happens to a PhD when your critical experiment is destroyed?
Thinking of the sadness in so many hearts
Cheers
Graham
-mike
The Students - avalanche
The Passengers - train
coincidence?
-Dave
-juice
PS, yes like many of you I'm a bike rider.
TWRX
Good choice.
-juice
A paisan size Happy Birthday and many more!
-Dave
Jim
Cheers Pat.
Bob
Happy 48th?
Jim-
Happy 36th?
;-)
-Dave
Bob
Reason I ask is a subie was stuck in a snow bank this morning, one front and one rear wheel spinning. Or maybe no rear wheel spinning? My co-worker saw that one rear wasn't spinning so we assume the other was.
1/2hour later the subie was out an a Jeep GC was in the same spot but needed a tow truck to get out. Not sure how the subie got out, but only the front wheels were in the deep snow. The Jeep was burried.
--jay
Happy B-day folks. Anyone get a gift certificate for Bob Bondurant?
-juice
Everything is relative... and speaking of relative(s): I spoke to my aunt yesterday, who is 89. She still thinks of me, and my cousins, as a "children."
Bob
I was humbled when my daughter told me I have no hair the other day. Ouch.
-juice
A glider's glide ratio is typically in the area of 20:1 or better, if memory serves correctly. So for every foot of altitude lost, it moves forward 20 feet. That glide ratio enables it to climb in a thermal, since it doesn't take much energy input to allow it to climb.
It seems to me that my father's single-engine Piper has a glide ratio of about 10:1. Jets, especially supersonic ones, generally do a lot worse - the Shuttle is an extreme example (hypersonic) of the latter case.
The shuttle's final approach is about 10x steeper than a typical jet airliner's. It doesn't glide so much as "fall with style", to quote Toy Story.
Don't mean to split hairs here, the discussion's been fun...
Hope this helps,
-brianV
Happy birthday to all!
Craig
The shuttle gliding to landing is all about energy - giving back all that which it gained during liftoff, and the management of that finite amount. By the time it's "wheels stop", it's all gone, either by way of motion, heat, or some other form.
Landing speeds are in the 205-210 knots range, IIRC, which is substantially faster than an equivalent airplane.
Cheers!
Paul
(former space junkie)
Mike
Jim
Greg
Thanks.
Steve
can we refer to the shuttle as ... "aircraft"? ...
seriously, I've enjoyed the discussion as well ...
Greg
I too enjoyed the philosophical discussions about flight. I think we should call the shuttle 'unique' and leave it at that!
In memory of happier times I put an enlarged copy of the photo I took from a roof top along the coast south of Canaveral the morning of April 12, 1981 on my office door. It is little more than a glowing dot with a trail of smoke, but the excitement and pride I felt is what I want to remember.
Steve
Happy birthday to all you young and old Subie farts (j/k)!!!
Happy birthday Serge! BTW, my son's birthday is on the 11th. He'll be 24.
Bob
n/m .. <emily lutella voice>
Bob
Jim
.... depends ....
Cheers!
Paul
-mike
-mike
Cheers!
Paul
(and the fonts changed back again, didn't they?)
rsholland
paisan
jimmyp1
serge
Thank goodness for cyber cake! No calories. :-)
KarenS/Host....celebrating a 10 pound loss!
Bob
Maybe we'll add "born in February" to the list of demographics. Daves and Mikes that use Macs, own pets, teach, favorite color blue, favorite numbers 555, etc.
-juice
I use IE 5.0 under Win2000.
Moderately annoying...
Edmunds, did you guys do any compatiblity testing before rolling out your new code ?
-brianV
Bob