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Message
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| boilingleadbath |
 Posted: 12/13/2007 19:33 PM Post subject: Hang Time Ballistics Live (beta)! |
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Joined: 12 Mar 2005
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Well, I finally got around to completing "hang time ballistics Live", a javascript program that calculates Muzzle velocity/hang time/Cd/Apogee of a projectile given some information.
For completeness, here are the input pairs and their outputs:
HangTime, Cd => search(Muzzle velocity), return(Appogee)
HangTime, Muzzle velocity => search(Cd), return(Apogee)
HangTime, Apogee => search(Cd,Muzzle velocity)
(HangTime-Apogee method not working well)
Cd, Muzzle velocity => return(HangTime, Apogee)
Cd, Apogee => search(muzzle velocity), return(hangtime)
Muzzle velocity, Apogee => search(Cd), return(hangtime)
| Description: |
Hang Time Ballistics Live: a .htm document and a png. Keep them in the same folder.
Beta (version 2) |
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Download |
| Filename: |
HTBLive.zip |
| Filesize: |
7.17 KB |
| Downloaded: |
34 Time(s) |
Last edited by boilingleadbath on 12/15/2007 18:25 PM; edited 1 time in total |
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| MrCrowley |
| Posted: 12/13/2007 20:36 PM Post subject: |
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Blizzard of Ozz
Joined: 23 Jun 2006
Posts: 6184
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Very cool, if you can use GGDT you can use this so it's not to difficult.
Seems pretty accurate to GGDT figures as well, nice stuff.
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| bigbob12345 |
| Posted: 12/13/2007 21:27 PM Post subject: |
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Experienced n00b
Joined: 01 Dec 2007
Posts: 1515
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| I just gave it a little go and I actually prefer it over GGDT its easier and just as accurate
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| ALIHISGREAT |
| Posted: 12/15/2007 5:08 AM Post subject: |
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Eternal Noob
Joined: 25 Aug 2007
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looks good but what is apogee i googled it and it came up with a wiki page talking about orbiting and stuff 
http://en.wikipedia.org/wiki/Apogee
edit: and do you have any idea how aerodynamic an airsoft bb is (6mm)?
edit 2: this page says it is 0.47 Cd  http://www.arniesairsoft.co.uk/?filnavn=/articles/fps_dist_time/fps_di st_time.htm
and your calcuator says i will be able to shoot a .43 sniper bb (6mm) ~130m and have an impact velocity of 22m/s which is nothing although if i shot a lightweight air rifle pellet with a better Cd then i could have massive ranges 
Last edited by ALIHISGREAT on 12/15/2007 5:26 AM; edited 2 times in total |
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| hubb017 |
| Posted: 12/15/2007 5:10 AM Post subject: |
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Sarcasmo
Joined: 28 May 2007
Posts: 1475
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This is a very nice and simple program. The only complaint I see is the fact that I have to convert from English to Metric, but that is really no big deal.
Good job.
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| jackssmirkingrevenge |
| Posted: 12/15/2007 5:23 AM Post subject: |
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space monkey
Joined: 15 Mar 2007
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| ALIHISGREAT wrote: | | looks good but what is apogee i googled it and it came up with a wiki page talking about orbiting and stuff |
in this case it refers to the peak of the projectile's trajectory.
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| ALIHISGREAT |
| Posted: 12/15/2007 5:38 AM Post subject: |
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Eternal Noob
Joined: 25 Aug 2007
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| Quote: | | in this case it refers to the peak of the projectile's trajectory |
so its not the range then?
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| jackssmirkingrevenge |
| Posted: 12/15/2007 5:39 AM Post subject: |
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space monkey
Joined: 15 Mar 2007
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| no, it's the point between the projectile stopping its upward travel and beginning its descent back to earth.
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| ALIHISGREAT |
| Posted: 12/15/2007 5:43 AM Post subject: |
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Eternal Noob
Joined: 25 Aug 2007
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| jackssmirkingrevenge wrote: | | no, it's the point between the projectile stopping its upward travel and beginning its descent back to earth. |
so the calculator is assuming you are firing at a 45 degree angle then?
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| MrCrowley |
| Posted: 12/15/2007 5:48 AM Post subject: |
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Blizzard of Ozz
Joined: 23 Jun 2006
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No, it assumes you are firing at an angle between 1 and 90 degrees.
i.e 'up'. 
Do you know what a parabola is? Well the apogee is the height of the parabola of the projectiles travel.
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| hubb017 |
| Posted: 12/15/2007 5:58 AM Post subject: |
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Sarcasmo
Joined: 28 May 2007
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From Webster:
Main Entry:
apo·gee
1: the point in the orbit of an object (as a satellite) orbiting the earth that is at the greatest distance from the center of the earth; also : the point farthest from a planet or a satellite (as the moon) reached by an object orbiting it — compare perigee
2: the farthest or highest point : culmination <Aegean>
— apo·ge·an Listen to the pronunciation of apogean \ˌa-pə-ˈjē-ən\ adjective
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| ALIHISGREAT |
| Posted: 12/15/2007 6:03 AM Post subject: |
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Eternal Noob
Joined: 25 Aug 2007
Posts: 1311
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| should there be something under the top box on the right because its blank for me with a funny symbol in the middle?
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| hubb017 |
| Posted: 12/15/2007 6:28 AM Post subject: |
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Sarcasmo
Joined: 28 May 2007
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| ALIHISGREAT wrote: | | should there be something under the top box on the right because its blank for me with a funny symbol in the middle? |
???
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| ALIHISGREAT |
| Posted: 12/15/2007 6:41 AM Post subject: |
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Eternal Noob
Joined: 25 Aug 2007
Posts: 1311
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i think there s meant to be a graph there or something but for me there isn't  which is slightly annoying 
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| hubb017 |
| Posted: 12/15/2007 6:56 AM Post subject: |
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Sarcasmo
Joined: 28 May 2007
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| If you are referring to my post, there was no graph. If you are referring to anyone elses post (which you have to be if you are not talking about mine) then I see no graph either.
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