You hit a mesh fence at 300kph, naked. What would happen?

[Steam]

Yes it's in bad taste,:dodge: but really.
Would you be minced into a hundred diamond-shaped bits like a chip-slicer, or just be stuck half in it, or crash straight through it and make a big hole? Or bounce off, or just be crushed like hitting a concrete wall, because maybe the body is too solid to be sliced up like that. :dodge:

[paturoa]

How fast is the fence going?

[Big Dave]

You'd get a bad strain.

[Steam]

How fast is the fence going?

The same speed as the ground. So, relatively, 300kph, from your brief perspective.

[Babelfish]

Dude, you're killin me :mellow:

[janno]

Would it be like water - hit it hard and it reacts like concrete?

I bet if the holes were bigger you'd get sliced. I wonder what the optimum hole size would be for maximum sliceage?

[naughty]

Why dont you give it a try and let us know how it goes

[paturoa]

If your willy is bigger than one of the holes then it may hurt a little, otherwise you'd prob be OK

[NZsarge]

If your willy is bigger than one of the holes then it may hurt a little, otherwise you'd prob be OK
.:killingme :killingme :killingme :killingme

[howdamnhard]

Yes it's in bad taste,:dodge: but really.
Would you be minced into a hundred diamond-shaped bits like a chip-slicer, or just be stuck half in it, or crash straight through it and make a big hole? Or bounce off, or just be crushed like hitting a concrete wall, because maybe the body is too solid to be sliced up like that. :dodge:
The soft bits would go through and be sliced and the hard bits i.e. helmet,boots bones would get stuck in the fence.Strange topic.:sick:

[Steam]

I'm talking about your normal wire mesh, but this sure would have an effect... High-tensile Welded Razor Wire Mesh!

[slopster]

I'm picking you'd just tear a big hole in the wire

[jafar]

I'm picking you'd just tear a big hole in the wire

my guess is you wouldn't care :shit:

[90s]

when wiley coyete does it, he distends the fence, which then catupults him backwards and upwards.

The damage is then done by falling into a van of mousetraps or into a canyon.

So I suppose that is the crucial factor.

[cowboy]

Ever watched the movie resident evil?
Think it mite be like the corridor scene :puke:

[Whynot]

I'm picking you'd just tear a big hole in the wire

im also thinking this may be the case, a human body travelling at 300kph has an incredible amount of momentum ....

something like p(rho)=mv
if m=80kgs and v=83.33m/s (300k/h)
p=80*83.33
p=6667 kg.m/s

now if we assume it takes the body around half a second to come to rest(equilibrium) after it hits the fence ....

F=ma
F=m*v/t
F=p/t
F=6667/0.5
F=13.333 kN of force

or 1333 kgs for those non standard people amoung us.

so yea, in conclusion i think the fence would break. :rockon:

[shcabbeh]

im also thinking this may be the case, a human body travelling at 300kph has an incredible amount of momentum ....

something like p(rho)=mv
if m=80kgs and v=83.33m/s (300k/h)
p=80*83.33
p=6667 kg.m/s

now if we assume it takes the body around half a second to come to rest(equilibrium) after it hits the fence ....

F=ma
F=m*v/t
F=p/t
F=6667/0.5
F=13.333 kN of force

or 1333 kgs for those non standard people amoung us.

so yea, in conclusion i think the fence would break. :rockon:

Noooooo! High school science coming back!

Stop proving the teachers right by applying their teaching to practical situations! :shit:

[Whynot]

Noooooo! High school science coming back!

Stop proving the teachers right by applying their teaching to practical situations! :shit:

sorry, i'm an Engineer i can't help it .... :innocent:

and when did riding naked into a fence at 300ks become a "practical solution" ... ?

[Romeo]

I've seen a video like this from Thailand, except he hit it at a 45° angle.

Result:
Fleshy extremity bits were missing and his head was mashed between the post and the mesh. The body remover guys had to get out the crowbars in order to pry out the helmet fragments and brain pieces - pretty nasty. Needless to say, if anyones planning on testing out any theories I would advise against it...

:sick:

[shcabbeh]

and when did riding naked into a fence at 300ks become a "practical solution" ... ?

Haha, you have a point.

[Biff]

Someone posted an image on here (I think) some time ago, allegedly taken by an ER team somewhere in Asia after some poor chappie hit one of those fences at around 100K (?). He wasn't wearing a hemlet at the tme of impact.

Let's just say the wall on the oppossite side of the fence he hit had a nice new grey pebbledash effect going on. :sick:

[imdying]

and when did riding naked into a fence at 300ks become a "practical solution" ... ?Depends on what the problem is... for example, you find out your wife is actually shemale :bye:

[Whynot]

Depends on what the problem is... for example, you find out your wife is actually shemale :bye:

like this guy?
http://www.kiwibiker.co.nz/forums/showthread.php?t=51375 (linky)

[imdying]

That's the one.

[krash69]

Ever watched the movie resident evil?
Think it mite be like the corridor scene :puke:

the move called "cube" has alot of effects that in it too......hehehehe

[McJim]

So when are you going to try this Steam?

Will the video be posted posthumously?

p.s. I don't believe either of your current rides can achieve 300kph though.

[yungatart]

Mince?
Kids love mince....

[McJim]

Mince?
Kids love mince....

Ha! I think you mean mints. :rofl:

[yungatart]

Ha! I think you mean mints. :rofl:

Maybe! I guess it could be construed as a "Minties" moment.

[NotaGoth]

Well.. What about those barrier things that are just the real thick wire???? I've heard of those doing ALOT of damage... What did they end up calling them..?? Cheese cutters or something along the line.. (not sure)


Someone could always try it, and let us know what happens... :shutup:

[janno]

Someone could always try it, and let us know what happens... :shutup:

I bet you wouldn't be letting anyone know anything anymore if you tried it . . .:gob:

[90s]

A motorway cop in Belgium showed me an accident scene that made my eyes water. On a long motorway sweeper at high speed a sportbike rider lost it, skidded 20m or so in his leathers, flipped up "star jump" style over a post before coming to rest on a soft grass covered verge. No damage to his body whatsoever because of his gear & leathers.





Oh, except he left his bollox on the post. I think I'd rather go for the wire fence.

[Steam]

or 1333 kgs for those non standard people amoung us.

so yea, in conclusion i think the fence would break. :rockon:

I don't reckon, that's only a ton and a bit. I reckon the fence would hold, be bowed inwards but I don't think the wires would break.
Hmm...

[Crasherfromwayback]

I'm talking about your normal wire mesh, but this sure would have an effect... High-tensile Welded Razor Wire Mesh!

Someone teach Sue Bradford to ride a bike.....I'll lend her our GSXR1000K7.

[rwh]

I don't reckon, that's only a ton and a bit. I reckon the fence would hold, be bowed inwards but I don't think the wires would break.
Hmm...

I think I agree at a ton and a bit - but I think I disagree with the assumption of half a second to come to rest. The fence wouldn't stretch far enough for that. So either the forces will be greater when the limit of stretch has been reached, or the limit won't be reached because the body has failed to decelerate ... and gone straight through.

I gather a pig is the standard experimental body ... talking about neither of the standard euphemisms here.

Richard

[Steam]

Cool, now, all we need for an experiment is a pig, a sturdy fence, and a Hayabusa.

[sAsLEX]

Someone teach Sue Bradford to ride a bike.....I'll lend her our GSXR1000K7.

I would think a k4 ZX10 with a 1/4 turn throttle would be better......... she aint likely to survive that!

[90s]

Actually some of our engineering friends could work out the forces applying through the mesh of the fence to its fixings, which could be of various types. I think many fences would give at the fastening to the post. The post in soft soil etc (along with a concrete block about the post end) might also be ripped out bringing down the fence.

I was awed by the show of math earlier so no somebody might like to prove me right. (which would be nice ... )

[rwh]

Cool, now, all we need for an experiment is a pig, a sturdy fence, and a Hayabusa.

I was thinking it might be easier if you accelerated the fence as well - say, strung between a couple of V8 utes - but yeah, sturdiness might be a problem. You don't want to end up sanwiching the pig's vehicle between the fence's ones ...

Richard

[ZeroIndex]

Yes it's in bad taste,:dodge: but really.
Would you be minced into a hundred diamond-shaped bits like a chip-slicer, or just be stuck half in it, or crash straight through it and make a big hole? Or bounce off, or just be crushed like hitting a concrete wall, because maybe the body is too solid to be sliced up like that. :dodge:

Why is everything with you about ugly rat bikes that wouldn't even see 200kph, or naked people?

[Drunken Monkey]

The Mythbusters team couldn't cut a pig with a steel wire snapping under tension (8 tons on a 5/8 steel cable at one stage). Wires cutting people looks dramatic in films, but is likely to stay within the realms of Hollywood physics. The fence would bend, it would highly likely be a fatal impact, but you won't end up with fence-hole sized chunks in a pile on the other side.
Not sure what the deal is with that Thai story, seen it before as well. I would ideally like to see a genuine report of that 'accident' scene, you can never trust the BS that gets attached with most images distributed on the web.

[Whynot]

Actually some of our engineering friends could work out the forces applying through the mesh of the fence to its fixings, which could be of various types. I think many fences would give at the fastening to the post. The post in soft soil etc (along with a concrete block about the post end) might also be ripped out bringing down the fence.

I was awed by the show of math earlier so no somebody might like to prove me right. (which would be nice ... )

yea, thats more what i was thinking of when i said the fence would break.
either come apart where the mesh attaches or the whole thing come out of the ground.

[Steam]

now if we assume it takes the body around half a second to come to rest(equilibrium) after it hits the fence ....

F=ma
F=m*v/t
F=p/t
F=6667/0.5
F=13.333 kN of force

or 1333 kgs for those non standard people amoung us.

so yea, in conclusion i think the fence would break. :rockon:

I think your assumption that it will take half a second to come to rest is a little too optimistic. In half a second at 300kph you'd travel over 40 meters. Assuming the fence would flex maybe a meter, you'd come to a stop in about a 40th of a second.
So if we plug 0.025 of a second into your formula, we get a force of 26668 kgs, or 26 tons!!! So yep I reckon the fence would definitely break! 26 tons, that's total mashing.

[bert_is_evil]

Those formula's made my brain bleed - can someone translate this using, say, photoshop?

[Whynot]

I think your assumption that it will take half a second to come to rest is a little too optimistic. In half a second at 300kph you'd travel over 40 meters. Assuming the fence would flex maybe a meter, you'd come to a stop in about a 40th of a second.
So if we plug 0.025 of a second into your formula, we get a force of 26668 kgs, or 26 tons!!! So yep I reckon the fence would definitely break! 26 tons, that's total mashing.

good point


Those formula's made my brain bleed - can someone translate this using, say, photoshop?

sorry i had to use mspaint, i hope its ok ....

[thehollowmen]

if you took half a second to stop, you'd be 20 m behind the fence (150 km/h = 41.667 m/s) so you need to revise that half a second estimate.

[deanohit]

sorry i had to use mspaint, i hope its ok ....

Hahahahahhah:Punk: awesome,man,makes total sense to me

[bert_is_evil]

sorry i had to use mspaint, i hope its ok ....

Much better - thanks for that

[Harry the Barstard]

When i was a fireman i went to a bike incident where a guy had mannaged to drop a wooden telephone pole with his bike. Thats a huge amount of force being generated there. My vote is that you would go through the fence if it was nice and tight, also i would recomend ducking oposed to a more upright riding position. But what if the fence was slack/loose? hmmmmmmmm

[Bend-it]

if it was loose, you'd go right through it, wake up the next morning and not even remember its name!

[Pancakes]

if you took half a second to stop, you'd be 20 m behind the fence (150 km/h = 41.667 m/s) so you need to revise that half a second estimate.

If it was normal construction, steel pole in the ground w/ concrete and netting attached w/ those little staples, lets say the wire was behind the poles so you could tear the wire off the poles fairly easily I recon the wire would hold up. (someones gonna math ninja me down, I feel it).

You could measure the surface area of the wire divided by the force to see if it would cut and it would be reasonable to say you could do a scale test with some pork belly and some #8 to see if it would cut you.

You'd have to also measure the decelleration to see how blended your grey soft bits would be once you'd stopped.

BAGS NOT!!

[ZeroIndex]

If it was normal construction, steel pole in the ground w/ concrete and netting attached w/ those little staples, lets say the wire was behind the poles so you could tear the wire off the poles fairly easily I recon the wire would hold up. (someones gonna math ninja me down, I feel it).

You could measure the surface area of the wire divided by the force to see if it would cut and it would be reasonable to say you could do a scale test with some pork belly and some #8 to see if it would cut you.

You'd have to also measure the decelleration to see how blended your grey soft bits would be once you'd stopped.

BAGS NOT!!

Send it into Mythbusters... they'd love a challenge like that... with dead pigs... and Buster...

[alecks69]

f!"£$%^&g aye sticky situation really some uni student work it out 4 lesser construction mortals ie ME