Welcome, Guest. Please Login
SLINGING.ORG
 
Home Help Search Login


Pages: 1 2 3 
Send Topic Print
Supersonic sling projectile? (Read 13100 times)
KnollSlinger
Senior Member
****
Offline


The Davidson Road KnollSlinger

Posts: 355
Chandler, Arizona, USA
Gender: male
Supersonic sling projectile?
Dec 9th, 2004 at 7:48am
 
Supersonic sling projectile!
Is it possible?  What kind of forces would be required?

Does a whip tip break the sound barrier?  Why not put a small pouch with a tiny tungsten projectile?

What would be the force on ones arm when the sling projectile reached MACH 1 at sea level?

At 10,000 feet?

What would be the best design?  Could even a treb do this?
Back to top
 

The Davidson Road KnollSlinger&&Who can beat me?
 
IP Logged
 
MammotHunter
Interfector Viris Spurii
*****
Offline


Give me a rock, a sling,
and give me some room

Posts: 1020
virginia, for now
Gender: male
Re: Supersonic sling projectile?
Reply #1 - Dec 9th, 2004 at 9:07am
 
I don't know the specifics of it, but you would have to have one hell of an arm on you to do it. I've gotten stones to fly out of my slings with a thrumming sound, which I understand, is basically the same principal of mass molecular displacement of the air surrounding the rock and I have had the tip of my sling crack like a whip, but the rocks were far below being supersonic by any means. And I don;t know of any trebuchet powerful enough to do that. It seems like the power to do that would rip the trebuchet apart at the seams before getting a projectile off.
Back to top
 

Foolish is he who frets at night,&&And lies awake to worry'&&A weary man when morning comes,&&He finds all as bad as before&&-Excerpted from "The Havemal"
palaeoEvolution  
IP Logged
 
Gun
Interfector Viris Spurii
Past Moderator
*****
Offline


Slinging  Viking

Posts: 1089
The Ozarks of Ark & Mo
Gender: male
Re: Supersonic sling projectile?
Reply #2 - Dec 9th, 2004 at 9:27am
 
I think we first need to know how much we need to improve. No one really knows how fast a sling projectile is going (yes i know about all the figures and test), but they are not exact. What is the gueniss book of world recorders was coming to your house to see you throw and they ask you how fast are you throwing. You say well somewhere between 50 feet per secound to 300 feet per secound. They are going to laught at the person because they want exact numbers. Could someone do it, proably. But first we need to know exacty where you stand on speed so we know how much to improve and what works in the test with different sling designs.
Back to top
 

"A Knifeless man is a lifeless man" Old Nordic Proverb
 
IP Logged
 
Tint
Interfector Viris Spurii
Past Moderator
*****
Offline



Posts: 2322
Hong Kong
Gender: male
Re: Supersonic sling projectile?
Reply #3 - Dec 9th, 2004 at 9:45pm
 
It would be really hard for a projectile from a sling to go faster than the speed of sound.  I remember from an earlier thread that for a rock to be thrown 500 yards (about 450 m), it'd would be traveling at about 200 km/h.  The speed of sound is roughly 1100 km/h.  A dart from a crossbow can go as fast as 300 ft/sec or 330 km/h.  As you can see, we are no where close to the sound barrier.

The tip of a whip can go faster than MACH 1 because the whip is tappered.  It is much heavier at the handle and really light and the tip, so when you swing it you create a wave that accelerate through the length of the whip.  If a tungsten projectile is added to the tip, however, that little weight would change the balance of the whip and hinder the acceleration.

If Supersonic sling projenctile is to become a reality, I'd expect the ammo to be really small.  May be 5mm in diameter.  The design of the sling may look like a whip but the release must be different from a normal sling.  having a release cord that double the length of the device at release would slow down the pouche.  Perharps a release that is similar to Yurek's dart throwing design may work. ???


Back to top
 
WWW  
IP Logged
 
KnollSlinger
Senior Member
****
Offline


The Davidson Road KnollSlinger

Posts: 355
Chandler, Arizona, USA
Gender: male
Re: Supersonic sling projectile?
Reply #4 - Dec 10th, 2004 at 1:15am
 
Tint,

Your analysis is inspiring.  Now to design one?

Who can do it?  Of course, if we are talking about a dust particle, perhaps a whip has already sent one past MACH 1.. but how to scale this up?

Can a machine be made to "crack" a giant "whip" ?
Back to top
 

The Davidson Road KnollSlinger&&Who can beat me?
 
IP Logged
 
DuckofDeath
Junior Member
**
Offline



Posts: 84
Re: Supersonic sling projectile?
Reply #5 - Dec 10th, 2004 at 3:33am
 
Sling a tungsten ball earthward from a balloon gondola 100,000 feet up and I bet it'll hit mach one.
Back to top
 
 
IP Logged
 
Mike_R
Funditor
****
Offline



Posts: 617
Re: Supersonic sling projectile?
Reply #6 - Dec 10th, 2004 at 3:57am
 
I'm not a physics expert but things can only fall so fast. Things speed up as they fall until a point where they reach terminal velocity.
Back to top
 
 
IP Logged
 
britishslinger
Senior Member
****
Offline


slings the handheld arlilery

Posts: 391
Re: Supersonic sling projectile?
Reply #7 - Dec 10th, 2004 at 4:58am
 
some man jumped bl from a o balloon from really k high because the air e was thinner he went past the speed of sound
Back to top
 

listen to old people
 
IP Logged
 
Tint
Interfector Viris Spurii
Past Moderator
*****
Offline



Posts: 2322
Hong Kong
Gender: male
Re: Supersonic sling projectile?
Reply #8 - Dec 10th, 2004 at 5:40am
 
I think 5 mm would be leathal if it is traveling at the speed of sound,  some lead bullets are that size, aren't there?  May be 9mm is possible too!  I am only guessing here.

If you are thinking about using a machine then I am sure it can crack a big heavy whip and scale everything up.  But keep in mind such a design would be hard to aim.  The end of a whip is not only moving fast, it is also changing angles very quickly, that would leave very little margin for timing error of the release.

When it comes to making one, my best guess is to ask Techstuf for advice.   Perharps we have some whip makers on the forum too?
Back to top
 
WWW  
IP Logged
 
KnollSlinger
Senior Member
****
Offline


The Davidson Road KnollSlinger

Posts: 355
Chandler, Arizona, USA
Gender: male
Re: Supersonic sling projectile?
Reply #9 - Dec 11th, 2004 at 12:43am
 
THis would be a close range device.. since hard to aim and the projectile very small, it would require the skill of a whip master to use.  It still, however, needs an inventor.
Back to top
 

The Davidson Road KnollSlinger&&Who can beat me?
 
IP Logged
 
Yurek
Funditor
Past Moderator
****
Offline


The best thing, is a good
sling.

Posts: 942
Poland
Gender: male
Re: Supersonic sling projectile?
Reply #10 - Dec 11th, 2004 at 5:04pm
 
Once, on some polish forum, a one guy wrote, that his living in a country grandfather, had related when he was a teenager, used to shot stones with a whip. Alas, the guy have never got to know detailes. The grandfather said, that stones were making marks on the wall, like a rifle bullet.

I also read an article, which mentioned about Carpathan stripligns, who used whips to shot stones. No details, only info about kind of a loop made on the whip ending.

I suppose it was rather something like a staff sling in the both mentioned cases, not like a bull-whip. But I might be wrong.

I remember, TechStuff wrote something about his tests with launching from the whip.

Jurek
Back to top
 

In the shape, structure and position of each stone, there is recorded a small piece of history. So, slinging them, we add a bit of our history to them.
 
IP Logged
 
KnollSlinger
Senior Member
****
Offline


The Davidson Road KnollSlinger

Posts: 355
Chandler, Arizona, USA
Gender: male
Re: Supersonic sling projectile?
Reply #11 - Dec 12th, 2004 at 10:42am
 
Jurek,

Thanks for this.  Now, we have work to document this phase of slinging and bring it up to latest technology.
Back to top
 

The Davidson Road KnollSlinger&&Who can beat me?
 
IP Logged
 
big_sling_gland
Ex Member


Re: Supersonic sling projectile?
Reply #12 - Jan 5th, 2008 at 10:57pm
 
Mike_R wrote on Dec 10th, 2004 at 3:57am:
I'm not a physics expert but things can only fall so fast. Things speed up as they fall until a point where they reach terminal velocity.

yes terminal volocity is the fastest it canfall when gravity and air resistance meets an equilibrium but if you put force on it to mke it go down I bet it would go faster.
Back to top
 
 
IP Logged
 
big_sling_gland
Ex Member


Re: Supersonic sling projectile?
Reply #13 - Jan 5th, 2008 at 11:01pm
 
britishslinger wrote on Dec 10th, 2004 at 4:58am:
some man jumped bl from a o balloon from really k high because the air e was thinner he went past the speed of sound

he had to wear a preasure suit or his blood would boil literally.
Back to top
 
 
IP Logged
 
DesertPilot
Descens
***
Offline


Oops!

Posts: 150
Mountain View, CA
Gender: male
Re: Supersonic sling projectile?
Reply #14 - Jan 6th, 2008 at 12:59am
 
Quote:
britishslinger wrote on Dec 10th, 2004 at 4:58am:
some man jumped bl from a o balloon from really k high because the air e was thinner he went past the speed of sound

he had to wear a pressure suit or his blood would boil literally.

It was Joseph Kittinger, an officer of the USAF.  On August 16, 1960, he jumped from the gondola of a research balloon 102,800' (almost 19-1/2 miles!) as part of Project Excelsior.  Check out the photo at

http://en.wikipedia.org/wiki/Project_Excelsior

It must be the ultimate, "It's too late to change your mind!" shot Smiley

More than four minutes in freefall.  And... oh wow... there are videos...

Back to top
 
 
IP Logged
 
Pages: 1 2 3 
Send Topic Print
(Moderators: Curious Aardvark, vetryan15, Rat Man, joe_meadmaker, Morphy, Chris, Kick)