wanderer wrote on Aug 26^th, 2007 at 1:42am:


A flourescent light!  I never thought of that!  What an awesome idea!  I shall have to give this a try.  If all goes as planned, I'll be on vacation in Maine next week -- a land full of many small smoothly rounded rocks -- which should allow some opportunity for experiments.  Do you have any recommendations for a suitable (and inexpensive) digital camera?

I finally ran across some of the old posts about ballistic pendulumns, so I see what you mean.  I'll still try it myself, on the off chance that I might, in my naive incompetence, stumble upon some brilliant idea that greater minds than mine have missed, but I'll probably just add to the long list of Embarassing Experiences I've managed to accumulate over the years

***Update on the attached file- added 1 & 2 oz then added weight in grams to the oz listings for the     varous columes

I finially joined the Form and decided to add my 2-bits to the subject

I've attached a Zipped PDF file that I think does a fairly good job at helping one to see just what a Sling is capable of doing along side say...a standard pistol cartridge. I beleave that this should represent standard store bought loads.

Just a little background on the Calculations used

    Km/h = 1.6*MPH
   
    ft/sec = MPH*5280/60^2(60 squared)
    5280 ft per mile
   
    m/sec = km/h*1000/60^2(60 squared)
    1000 meters per km

    60^2(squared) gets the calulations down to the second

    Amount of Kinetic Energy = Weight of the projectile*Velocity in ft/sec^2(squared)/Constant

    Constant = 32.163^2(squared)*1
    Acceleration of Gravity = 32.163 ft/sec

Normally in the constant you will see instead of the number "1" for 1 pound, you will see the number "7000" because there are 7000 grains to the pound & bullet weight is in grains. Since that seems to be way too small of an increment of measurement for Sling Projectiles, I just left it at 1 pound.

I'm looking for ways to improve this, or add to it, or correct any mistakes

I hope this is of use to you

[quote]Looking at these numbers, I think I've lost any interest in having in having one walk on my back with heels[/quote]
lol that implies you'd thought about it before though ;-)

A slight play on words: The slinger of physics.
Gives you person who throws doctors around - I volunteer my gp who in the words of the specialist at the hospital is: 'f***ing useless !'

You people never cease to amaze me.  Not only do you sling, but you apply the scientific method of research to your slinging.

In most of the technical threads I am WHOLLY out of my depth, but I enjoy reading them, if only to see the quality and intelligence of the people who contribute.

(No, I ain’t a bloody toady.  Just amazed, that’s all.)

I do have one idea for the “compound sling” forum I want to think about before I post.  If it works it might solve a few difficulties.

Trebuchet

kellymcdman wrote on Oct 12^th, 2007 at 1:01am:


I really just wanted to do that to spite you  Basically what you do is press the quote button, and when ou go to the page where you write your response, what you quoted is within two codes which are within brackets. Just erase the part you don't want to be quoted.