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Offline Parrott-Cannon

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Cannon Trojectory
« on: November 20, 2009, 03:34:32 PM »
Here is a link to a trajectory cal. from the University of Calorado.


http://phet.colorado.edu/sims/projectile-motion/projectile-motion.swf
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Offline RocklockI

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Re: Cannon Trojectory
« Reply #1 on: November 20, 2009, 03:53:30 PM »
Oh Parrott Cannon Great post Thanks ! 8)

It will be fun

Gary
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"I've seen too much not to stay in touch , With a world full of love and luck, I got a big suspicion 'bout ammunition I never forget to duck" J.B.

Offline GGaskill

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Re: Cannon Trojectory
« Reply #2 on: November 20, 2009, 06:25:59 PM »
A few trial shots lead me to believe this is not a very accurate simulator.
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Offline agent141

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Re: Cannon Trojectory
« Reply #3 on: November 20, 2009, 09:24:57 PM »
Is there an accurate simulator out there ??

Rick
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Offline GGaskill

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Re: Cannon Trojectory
« Reply #4 on: November 20, 2009, 09:44:23 PM »
For what kind of gun/projectile?
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Offline Will Bison

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Re: Cannon Trojectory
« Reply #5 on: November 21, 2009, 05:39:34 AM »
That's an interesting little tool. I plugged in some of my observed data and it came very close. Last Spring we shot over a dry lake to about 1,300 meters and various ranges in between.

One factor that may skew results is the elevation above sea level. Density Altitude must be used not the actual true altitude. Drag is the other iffy factor. I shoot a round ball with a sabot that stays on the ball to first impact. I have no clue what the real drag numbers are.

Thanks for posting that Parrot.

Bill
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Offline subdjoe

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Re: Cannon Trojectory
« Reply #6 on: November 21, 2009, 07:00:21 AM »
Here is another game.  NLOS Cannon Challenge
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Offline agent141

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Re: Cannon Trojectory
« Reply #7 on: November 22, 2009, 12:48:29 PM »
GGaskill,  BB mortar.  how inaccurate do you think it is???

I am still looking for an accurate  / easy way to figure max height

Rick
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Offline RocklockI

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Re: Cannon Trojectory
« Reply #8 on: November 22, 2009, 02:00:20 PM »
Subdjoe a new version of Kong ,the bananna throwing monkey onto skyscrapers .

Looks like fun .
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"I've seen too much not to stay in touch , With a world full of love and luck, I got a big suspicion 'bout ammunition I never forget to duck" J.B.

Offline Double D

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Re: Cannon Trojectory
« Reply #9 on: November 22, 2009, 02:31:08 PM »
Quote from: agent141 on November 22, 2009, 12:48:29 PM
GGaskill,  BB mortar.  how inaccurate do you think it is???

I am still looking for an accurate  / easy way to figure max height

Rick

I was a consultant on the Northern Toole County Bowling Ball Mortar Project this past.  This project was conducted as therapy for a couple of senior citizens trying  to adapt after a transition from a lifetime of work and toil, to a life of retired leisure.

Ballistic models will not accurately predict the reults that are acquired from actual firing.  No two bowling balls are the same weight nor have the same finger hole pattern.  Windage will also very from day to day from air temperature and different results will be achieved with all other factors are the same. 

We found it best to start with a small charge and work up.  Make a notes about each ball when you fire; weight, charge weight and range.  No two will shot the same.

Word of warning.  If you intend to fire a bowling ball as high and as far as you possibley can. Think real carefully about where it is going to land.  I can tell you from experience when the ball goes up and out of sight, and you no longer know where it is going it is scary!!!

Fire it where can see for sure in excess of a mile and you can see the flight of the ball from muzzle to impact....you want to be absouluty sure beyond any doubt that there is nothing that can be hurt or injured from that ball.

If you are firing off into the trees and you can not see the actual impact zone, you are careless and negligent and give us all a bad name.

Impact zone being the area where the projectile impacts and comes to rest!


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Offline Cat Whisperer

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Re: Cannon Trojectory
« Reply #10 on: November 22, 2009, 05:48:43 PM »
Quote from: agent141 on November 22, 2009, 12:48:29 PM
GGaskill,  BB mortar.  how inaccurate do you think it is???
I am still looking for an accurate  / easy way to figure max height
Rick

Do you know an ATC that can take a quick reading on the radar for you?

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Offline GGaskill

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Re: Cannon Trojectory
« Reply #11 on: November 22, 2009, 06:49:03 PM »
You would have to wrap the ball in aluminum foil to let the radar see it.
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“If you're not a liberal at 20, you have no heart; if you're not a conservative at 40, you have no brain.”--Winston Churchill
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