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Distance Calculators

A place to ask general spud cannon related questions.
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Distance Calculators

Unread postAuthor: Stifler69 » Thu Jul 24, 2008 5:42 am

Well the name really says it all,
Does anyone know of any good Distance calculators that you could use on a computer or manually to measure the distance of shots fired ???

It would be really good to see how far each shot goes...

Cheers for any help
:D :D :D :D
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Unread postAuthor: TurboSuper » Thu Jul 24, 2008 6:22 am

Umm...the only program I know of is GGDT.

Your other option is to fire the projectile straight up, and then pray you can see it at it's apogee, that way you could use trig to calculate the height.

Otherwise you'd need to know the launch angle and muzzle velocity. Do you have a chrony?
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Unread postAuthor: Stifler69 » Thu Jul 24, 2008 6:41 am

Mmmm thank ill have to look that up.

Hahaha yeah and hope u dont get hit on te way down..
Umm nah i dont, (im kinda new to this) so i dont actully know what a chrony is lol ??

thanks so much buddy
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Unread postAuthor: SpudFarm » Thu Jul 24, 2008 9:42 am

talk to ragnarok or jimmy.
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Unread postAuthor: Ragnarok » Thu Jul 24, 2008 9:47 am

As SpudFarm says, I do have a spreadsheet/program, but at the moment, I have the only working copy.

For the right information, I could persuaded to run a few numbers through one of the alpha builds.
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Unread postAuthor: POLAND_SPUD » Thu Jul 24, 2008 10:47 am

there is a programme/spreadsheet (.XML file) (not the one made by Ragnarok) but unfortunately I removed it and I don't know where I found it...
try searching for 'range calculator' or something it has to be somewhere...
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Unread postAuthor: POLAND_SPUD » Thu Jul 24, 2008 10:59 am

POLAND_SPUD wrote:there is a programme/spreadsheet (.XML file) (not the one made by Ragnarok) but unfortunately I removed it and I don't know where I found it...
try searching for 'range calculator' or something it has to be somewhere...


EDIT
I've found it --> http://bb.1asphost.com/sigmarhaven/SSpi ... orV2-2.xls

EDIT no 2
oh great I don't know how to use edit function :)
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Unread postAuthor: Ragnarok » Thu Jul 24, 2008 11:31 am

POLAND_SPUD wrote:I've found it --> http://bb.1asphost.com/sigmarhaven/SSpi ... orV2-2.xls

To the best of my knowledge, that link is long since dead.
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Unread postAuthor: rcman50166 » Thu Jul 24, 2008 11:53 am

You should look in the spudfiles wiki. There are various types of calculators but all are devoted to spudgun related matters. My program is in there too. It is specifically built for graphing calculators. You know just in case. :wink:
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Unread postAuthor: ALIHISGREAT » Thu Jul 24, 2008 11:56 am

^^^well i just downloaded it (and have before on a different PC)
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Unread postAuthor: POLAND_SPUD » Thu Jul 24, 2008 11:57 am

it works fine...

if you have any problems PM me, I've just found it on my computer
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Unread postAuthor: ralphd » Fri Jul 25, 2008 6:45 am

Low tech rules. Just grab a bag of spuds, a lawn chair and a measuring tape.
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Unread postAuthor: DYI » Fri Jul 25, 2008 8:42 am

Low tech rules. Just grab a bag of spuds, a lawn chair and a measuring tape.


Assuming that it's a half decent cannon, you're going to have a hell of time finding where something as small (and prone to splattering) as a potato landed, even if it is going slow enough to be seen leaving the barrel as is the case in most handheld launchers.
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Unread postAuthor: POLAND_SPUD » Fri Jul 25, 2008 9:41 am

you can spot where something landed when you fire on a freshly plowed field (of course the soil has to be dry)

you can even put small poles every 50 m or so becasue it's easier to find your ammo if you have some refference point
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Unread postAuthor: jimmy101 » Fri Jul 25, 2008 2:23 pm

Like poland_spud said, just put markers out every (insert suitable distance here) feet. Then put a spotter person out to the side, perhaps 100 feet down range but off the line of flight by the same distance they are downrange (so they don't get hit). With markers every 50' you should be able to get the impact point acurate to perhaps +/- 10 feet. The spotter only needs to be able to see the projectile right before it hits the ground. They don't need to be able to see it when it leaves the muzzle. It'll help if the spotter know about where the projecctile is going to hit so it may take a couple shots to get a good measurement.

Another way to do it would be to fire over a lake. Put spotters out a hundred feet or so on either side of the gun, each with a homemade transit. (Like a straw glued to a protractor mounted horizontally on top of a suitable support like a camera tripod.) The splash gives the spotters time to sight the impact point. Record the two angles and calculate the range with a bit of trigonometry.
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