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Reply With QuoteHi,
I'm the developer of this app. If you have suggestions for improvements let me know as we are working on version 1.1 with a fix to the Joules calculation and an increase in maximum pellet weight.
Cheers,
Wayne
This is a discussion on Energy Calculator for Iphone within the Links forums, part of the Airguns category; http://itunes.apple.com/au/app/air-g...403661770?mt=8...
Hi,
I'm the developer of this app. If you have suggestions for improvements let me know as we are working on version 1.1 with a fix to the Joules calculation and an increase in maximum pellet weight.
Cheers,
Wayne
excellent app - well worth it! it's a bit fiddly to slide the bars (eg) to get the exact pellet weight but its easy to tap the numbers and enter the digits manually. what is good is that you can set the weight for a particular pellet and slide the velocity bar along to see the max velocity possible to keep within the law. i know there are calculators online etc but this is good because you dont need to access tinternet to use it!
PS - good on ya, Wayne!!
any chance to could write an app that tells me what sort of mood my missus will be in after work?? (that would be worth a fortune!)
cheers
Taff
I've got a real crude energy calculator which works on Android phones.
Simple HTML/javascript page which works in most browsers - takes metric or imperial units and outputs Joules and Foot Pounds.
If anyone wants a copy I can mail it or post it.
Last edited by DougR; 19-05-2011 at 20:51 PM.
Very useful, but is a bit delicate for my big fingers, but good I like it
ThanksTrev
Is this an iphone party only or is android invited? I'll definitely be interested if it's also available for androidOriginally Posted by wcosshall
Android Howto:
Take the following code and create a file called GunCalc.html on your computer (Cut-nPaste into notepad will do nicely)
You can test the html file by dragging it onto your browser on the computer - should be pretty obvious ho you use it.Code:<html> <head></head> <script language=javascript> function isNumber(n) {//alert ("isNumber"); return !isNaN(parseFloat(n)) && isFinite(n); } function EnCalc(frm) { fpe = (frm.ipMass.value * frm.ipVel.value * frm.ipVel.value)/450240 frm.opEng.value=""+fpe; joules = fpe * 1.35581795 ; frm.opMet.value = "" + joules; return; } function GramsToGrains(frm) { if (isNumber(frm.ipGrams.value) ) {frm.ipMass.value = frm.ipGrams.value * 15.4323584;} else {alert("Need a numeric input \nfor Grams") frm.ipGrams.focus(); }; } function MetersToFeet(frm) { if (isNumber(frm.ipMS.value) ) {frm.ipVel.value = frm.ipMS.value * 3.2808399; } else {alert("Need a numeric input \nfor M/s") frm.ipMS.focus(); }; } function initial (frm) { //alert ("initialising"); frm.ipMS.value=""; frm.ipGrams.value=""; } </script> <body> <h2>Gun Calculations</h2> <Form name="calcForm"> <table border=1> <tr> <TH>Mass</th> <TH>Speed<</th> <TH>Energy</th> </tr> <tr> <TD align="center">Grams <input Name="ipGrams" type=text size=6 Value=""> <br> <input Name="btMconv" type="Button" value="To Grains" onClick="GramsToGrains(this.form)"> <br>Grains <input Name="ipMass" type=text size=6 Value=8> </td> <TD align="center">M/S <input Name="ipMS" type=text size=6 Value=""> <br> <input Name="btVconv" type="Button" value="To FPS" onClick="MetersToFeet(this.form)"> <br>F.p.S. <input Name="ipVel" type=text size=4 Value=800> </td> <TD align="center">Joules<Input Name="opMet" type=text Size=5 value=""> <br><input type="button" Value="Calculate" onClick="EnCalc(this.form)"> <BR>F.P.E.<Input Name="opEng" type=text Size=5 value=""> </td> </tr> </table> </Form> <tt><pre> 1 grain = 0.06479891 grams 1 gram = 15.4323584 grains Energy in FP is mass_grains(V_FPS*V_FPS)/450240 </pre></tt> </body> <script language=javascript>initial(calcForm)</script> </html>
Connect your Android phone to your computer.
Create a Directory on the SD card called MyHtml
Copy GunCalc.html into this new directory
Disconnect the Phone from the 'puter.
In the phone's browser "file://sdcard/MyHtml/GunCalc.html"
Found it good. I have had difficulties with it freezing - although, the aforementioned, is probably down to my incredibly old iPhone.
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