Tank Cleaning.

"Knobdoodle" wrote

Both! Poser-Permit 43.

Theo

 

The award for Scorning Mere Anecdotes, Researching Truth And Relating Said
Explanation, first awarded to Jeffles for his research into the braking distance
of tanks.

--
// Rik Steenwinkel '85 R80ST Skippy bike
// Enschede '91 R100GS/PD The Great Unwashed
// Netherlands '90 K75C Kommutabike
// "Far away is only far away '81 MZ TS250/1+LSW Badkuip
// if you don't go there" '79 Honda XL250S TBD

 

Nearly - I started that one after a discussion (read argument) in a
pub one night with an ex-army guy who was trying to tell me that a
tank could stop in half its length from 80 km/h. I started thinking
about the kinetic energy stored in something weighing 20 tonnes and
how that energy would have to be dispersed to pull the bloody thing up
in that sort of distance (still reckon it's bullshit).

Cheers



-------------
Kevin Gleeson
Technical Director
Blue Rocket Productions
Hobart, Tasmania, Australia
www.blue-rocket.com.au

 

X-No-archive: yes
Rik Steenwinkel wrote in message ...

Ha ha; I remember Jeffles' S.M.A.R.T.A.R.S.E. sigfile but I'd never seen it
spelt out before!
What was the award for maintaining the faith against insurmountable odds?
(Like if someone says "I can't ride because my wife died delivering my
sextuplet children...." and someone else will pop up with "that happened to
me but I fitted 6 sidecars to my MZ250...")
Clem

 

I reckon it would take a while to get the dirt out of the barrel of the main
gun.

Thinking hypothetically, and trying to picture a Centurion (the only tank I
know a tiny bit about), I can picture a big stoppie, a barrel hitting the
ground, the a rather noisy clank-type sound. Maybe it could be done. I
wouldn't like to be inside it, though.

 

On 10/2/04 12:13 AM, in article

Nah, it was clear to the left. Therefore, go.......

Result, Bang! Panel damage is at 6k, suspension yet to be quoted on....

Hammo

 

Ta! Driver apologised and admitted fault before Kath needed to do anything!

Hammo

Dissection kit? Where is Sam when you need her?

PS 6K in panels, getting suspension assessed now....

 

Probably some loser.....

Hammo

 

Heh, even the cop that was first on the scene associated me with the wrong
vehicle!

I'll tell you the rest over a beer....

Hammo

 

"Driver" wasn't tuning right.........


[1] Careful with that, unless it is very late at night....

Hammo

 

.... and someone exclaiming "Nice one, Centurion!"

-----sharks (it's inevitable)

 

You've misspwelled "Centuwion".

G

 

"Hamish Alker-Jones" wrote

Driver was out of tune?

Theo

 

*Points turret to one side,and tries again...*


Postman Pat

 

Lessee, taking a Leopard 2 as example. Length is 7m69. Top speed on road is
72km/h. Combat weight is 55 ton.

To decelerate to zero from 72km/h or 20m/s in, leaving some slack here, 4m
appears to be possible only if you hit a suitably-sized block of concrete.
Plugging the above numbers into the venerable s(t)=s0 + v0*t + 0.5*a*t^2 and
v(t)=v0 + a*t results in t=0.4s and a=-50m/s^2, or a little over 5g. Also, you
need to be dissipating 0.5*m*v^2, which is 110MJ of energy in those 0.4s.

If you relax the braking distance to be equal to its (chassis) length you get
t=0.8s and a=-25m/s^2, 2.5g. I think that could be doable. I've certainly seen
video footage of a tank showing some impressive braking, but I couldn't tell if
it was approaching that last set of figures.

--
// Rik Steenwinkel '85 R80ST Skippy bike
// Enschede '91 R100GS/PD The Great Unwashed
// Netherlands '90 K75C Kommutabike
// "Far away is only far away '81 MZ TS250/1+LSW Badkuip
// if you don't go there" '79 Honda XL250S TBD

 

.... so the question is, where is its center of gravity, and where
is the point it is trying to rotate around? Then you can work out
if it'll stoppie or not

-----sharks

 

Yeah, as it is both shaft- and chaindrive you'll have to resort to scientific
methods for that.

--
// Rik Steenwinkel '85 R80ST Skippy bike
// Enschede '91 R100GS/PD The Great Unwashed
// Netherlands '90 K75C Kommutabike
// "Far away is only far away '81 MZ TS250/1+LSW Badkuip
// if you don't go there" '79 Honda XL250S TBD

 

It's belt drive too (kind of).

-----sharks

 

I wasn't allowed to "tune" his head...

Hammo

....and he kept apologising and telling me it was his fault, and he was
wearing glasses!