We have new goalposts

#30
#30
I cannot imagine those goal posts sitting in that river for too long. Has anyone heard any news about an attempt to pull them out yet?
 
#31
#31
VFL-82-JP said:
Okay, this is geeky as hell. But let's figure out whether those goalposts would float if the installation crews were more careful to make all the joints and attachment points watertight. heh.

Total length of pipe used: 160', someone said. Close enough to work with. That's 1,920".
Outside diameter of the pipe: looks to be about 5". So outside radius is 2.5".
Inside diameter of the pipe: let's guess 4.5" (guessing 1/4" walls). So inside radius is 2.25".
Wall centerpoint radius (for calculating metal volume), then = 2.375".
Material: we'll assume aluminum.
Total volume of water displaced by a goal post barely floating: pi * r-squared * length = 3.14159 * 2.5"-squared * 1920" = 37,699 cubic inches of displaced H20
Volume of aluminum in the pipe walls: 2 * pi * r * thickness * length = 2 * 3.14159 * 2.375" * * 0.25" * 1920" = 7,163 cubic inches of aluminum

Now it's just a question of which weighs more: that volume of aluminum (plus the negligible weight of the air inside the tubes), or that volume of displaced water.

Water unit mass = 0.036127 pounds per cubic inch
Aluminum unit mass = 0.097506 pounds per cubic inch

So the goal posts each weigh: 0.097506 lb/ci * 7,163 ci = 698.4 pounds

And the water displaced by a goal post weighs: 0.036127 lb/ci * 37,699 ci = 1,362 pounds

Therefore, the goalpost weighs much less than the water it displaces, and will most certainly float!

Except for the fact that there's no way those fellas took the effort to make the joints or the holes where they ran bolts air-tight. lol

So, all this work for naught. But still good to know that a goal post probably weighs about 700 pounds and that it would float if you needed it to!

Go Vols!


p.s. Checking my work after the fact, I strikes me as unlikely a single goal post is 160' total length (both arms and the crossbar). Probably more like 80' for each, 160' together -- like 30' long arms, and a 20' cross bar, something like that.

Anyway, the bouyancy calculations are good either way, this just means we're throwing both goal posts in the water to see if they float, rather than just one.

But it is probably true that a single goal post weighs closer to the 350-400 pound range, than being almost 700 pounds each.

Go Vols! Go School of Engineering! Go geeks!
Click to expand...

Oh crap.. I got a headache just reading that...

Go VOLS
 
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#33
#33


at 12:18 in the video the dude said they had 2 new goalposts ready because they knew they were coming down. No telling if he was right or not. I would have to say it would have been wise to plan ahead for such a thing. Don't need to be waiting on Amazon on Friday evening waiting for the uprights to arrive.
 
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#34
#34
OrangeFrog said:


at 12:18 in the video the dude said they had 2 new goalposts ready because they knew they were coming down. No telling if he was right or not. I would have to say it would have been wise to plan ahead for such a thing. Don't need to be waiting on Amazon on Friday evening waiting for the uprights to arrive.
Click to expand...


They've had the 2 extras since 1998.
 
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#36
#36
VFL-82-JP said:
Nothing like a livestream of some fellas doing maintenance and assembly on some metal poles. Heh.

Vol Nation, where even our goalpost installations are coverage-worthy!

GO Vols!
Click to expand...

Much better than watching them sweep up mustard bottles.
 
#39
#39
I’m just hoping the “fund-me” goalpost stories go away… a bit embarrassing. I did see a story today that said Josh told everyone he’d pay for replaceKent’s if necessary… classy move by our coach. Go VOLS!
 
#43
#43
That irks me. Take the memento, OK I sort of get it. Steal turf from Neyland to try and make a cheap buck is pretty low. Who would even buy it?
 
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