<a href="DC.htm"><B>DESCENT CALCULATOR</a><BR>
<BR>
<a href="rle154.htm"><B>RLE Ty-154M</a>
<BR>
<BR>
<fieldset>
<legend><b>Pressure</b></legend>
<p>
<table border=1 bgcolor="CC9900" cellpadding=5>
<tr>
<td><FONT SIZE=+1>Airport elevation::</td>
<td>
<input type='text' id='prevish_m' value='0' size='7' onChange='Calculate(document.getElementById("prevish_m").value, "prevish_m");'> meters<br>
<input type='text' id='prevish_f' value='0' size='7' onChange='Calculate(document.getElementById("prevish_f").value, "prevish_f");'>feet
</td>
</tr>
</table>
<br>
<table border=1 bgcolor="CC9900" cellpadding=5>
<tr>
<td><center><FONT SIZE=+1>QNH</center></td>
<td><center><FONT SIZE=+1>QFE</center></td>
</tr>
<tr>
<td>
<input type='text' id='qnh_inch' value='0' size='10' onChange='Calculate(document.getElementById("qnh_inch").value, "qnh_inch");'> inches Hg<br>
<input type='text' id='qnh_mm' value='0' size='10' onChange='Calculate(document.getElementById("qnh_mm").value, "qnh_mm");'>mm Hg<br>
<input type='text' id='qnh_bar' value='0' size='10' onChange='Calculate(document.getElementById("qnh_bar").value, "qnh_bar");'>milibar
</td>
<td>
<input type='text' id='qfe_inch' value='0' size='10' onChange='Calculate(document.getElementById("qfe_inch").value, "qfe_inch");'> inches Hg<br>
<input type='text' id='qfe_mm' value='0' size='10' onChange='Calculate(document.getElementById("qfe_mm").value, "qfe_mm");'>mm Hg<br>
<input type='text' id='qfe_bar' value='0' size='10' onChange='Calculate(document.getElementById("qfe_bar").value, "qfe_bar");'>milibar
</td>
</tr>
</table>
</fieldset>
<BR>
<BR>
<table border=1 bgcolor="CC9900" cellpadding=5>
<tr>
<td><FONT SIZE=+1>Vertical speed:</td>
<td>
<input type='text' id='ms' value='0' size='7' onChange='CalVS(document.getElementById("ms").value, "ms");'><B>m/s<br>
<input type='text' id='ftm' value='0' size='7' onChange='CalVS(document.getElementById("ftm").value, "ftm");'><B>ft/min
</td>
</tr>
</table>
<BR>
<table border=1 bgcolor="CC9900" cellpadding=5>
<tr>
<td><FONT SIZE=+1>Distance:</td>
<td>
<input type='text' id='mil' value='0' size='7' onChange='Calm(document.getElementById("mil").value, "mil");'><B>nm<br>
<input type='text' id='km' value='0' size='7' onChange='Calm(document.getElementById("km").value, "km");'><B>kilometers
</td>
</tr>
</table>
<BR>
<table border=1 bgcolor="CC9900" cellpadding=5>
<tr>
<td><FONT SIZE=+1>Altitude:</td>
<td>
<input type='text' id='ft' value='0' size='7' onChange='Cala(document.getElementById("ft").value, "ft");'><B>feet<br>
<input type='text' id='m' value='0' size='7' onChange='Cala(document.getElementById("m").value, "m");'><B>meters
</td>
</tr>
</table>
<BR>
<table border=1 bgcolor="CC9900" cellpadding=5>
<tr>
<td><FONT SIZE=+1>Speed:</td>
<td>
<input type='text' id='kt' value='0' size='7' onChange='Cals(document.getElementById("kt").value, "kt");'><B>kt<br>
<input type='text' id='kmh' value='0' size='7' onChange='Cals(document.getElementById("kmh").value, "kmh");'><B>km/h
</td>
</tr>
</table>
<BR>
<script language='JavaScript'>
Calculate(29.92, 'qnh_inch');
function Calculate($value, $value_name){
var $qnh_inch, $qnh_mm, $qnh_bar, $qfe_inch, $qfe_mm, $qfe_bar, $prevish_m, $prevish_f;
switch($value_name){
case 'prevish_m':
$prevish_m = $value;
$prevish_f = $prevish_m/0.3048;
$qnh_inch = document.getElementById('qnh_inch').value;
$qnh_mm = document.getElementById('qnh_mm').value;
$qnh_bar = document.getElementById('qnh_bar').value;
$qfe_inch = $qnh_inch - $prevish_m*0.00328144;
$qfe_mm = 25.4*$qfe_inch;
$qfe_bar = 33.86*$qfe_inch;
break;
case 'prevish_f':
$prevish_f = $value;
$prevish_m = $prevish_f*0.3048;
$qnh_inch = document.getElementById('qnh_inch').value;
$qnh_mm = document.getElementById('qnh_mm').value;
$qnh_bar = document.getElementById('qnh_bar').value;
$qfe_inch = $qnh_inch - $prevish_m*0.00328144;
$qfe_mm = 25.4*$qfe_inch;
$qfe_bar = 33.86*$qfe_inch;
break;
// ------------------------------------------------
case 'qnh_inch':
$qnh_inch = $value;
$qnh_mm = 25.4*$qnh_inch;
$qnh_bar = 33.86*$qnh_inch;
$prevish_m = document.getElementById('prevish_m').value;
$prevish_f = document.getElementById('prevish_f').value;
$qfe_inch = $qnh_inch - $prevish_m*0.00328144;
$qfe_mm = 25.4*$qfe_inch;
$qfe_bar = 33.86*$qfe_inch;
break;
case 'qnh_mm':
$qnh_mm = $value;
$qnh_inch = $qnh_mm*0.039368;
$qnh_bar = 33.86*$qnh_inch;
$prevish_m = document.getElementById('prevish_m').value;
$prevish_f = document.getElementById('prevish_f').value;
$qfe_inch = $qnh_inch - $prevish_m*0.00328144;
$qfe_mm = 25.4*$qfe_inch;
$qfe_bar = 33.86*$qfe_inch;
break;
case 'qnh_bar':
$qnh_bar = $value;
$qnh_inch = $qnh_bar*0.0295331;
$qnh_mm = 25.4*$qnh_inch;
$prevish_m = document.getElementById('prevish_m').value;
$prevish_f = document.getElementById('prevish_f').value;
$qfe_inch = $qnh_inch - $prevish_m*0.00328144;
$qfe_mm = 25.4*$qfe_inch;
$qfe_bar = 33.86*$qfe_inch;
break;
// ------------------------------------------------
case 'qfe_inch':
$qfe_inch = $value;
$qfe_mm = 25.4*$qfe_inch;
$qfe_bar = 33.86*$qfe_inch;
$prevish_m = document.getElementById('prevish_m').value;
$prevish_f = document.getElementById('prevish_f').value;
$qnh_inch = $qfe_inch + $prevish_m*0.00328144;
$qnh_mm = 25.4*$qnh_inch;
$qnh_bar = 33.86*$qnh_inch;
break;
case 'qfe_mm':
$qfe_mm = $value;
$qfe_inch = $qfe_mm*0.039368;
$qfe_bar = 33.86*$qfe_inch;
$prevish_m = document.getElementById('prevish_m').value;
$prevish_f = document.getElementById('prevish_f').value;
$qnh_inch = $qfe_inch + $prevish_m*0.00328144;
$qnh_mm = 25.4*$qnh_inch;
$qnh_bar = 33.86*$qnh_inch;
break;
case 'qfe_bar':
$qfe_bar = $value;
$qfe_inch = $qfe_bar*0.0295331;
$qfe_mm = 25.4*$qfe_inch;
$prevish_m = document.getElementById('prevish_m').value;
$prevish_f = document.getElementById('prevish_f').value;
$qnh_inch = $qfe_inch + $prevish_m*0.00328144;
$qnh_mm = 25.4*$qnh_inch;
$qnh_bar = 33.86*$qnh_inch;
break;
}
document.getElementById('prevish_m').value = (Math.round($prevish_m*100))/100;
document.getElementById('prevish_f').value = (Math.round($prevish_f*100))/100;
document.getElementById('qnh_inch').value = (Math.round($qnh_inch*100))/100;
document.getElementById('qnh_mm').value = (Math.round($qnh_mm*100))/100;
document.getElementById('qnh_bar').value = (Math.round($qnh_bar*100))/100;
document.getElementById('qfe_inch').value = (Math.round($qfe_inch*100))/100;
document.getElementById('qfe_mm').value = (Math.round($qfe_mm*100))/100;
document.getElementById('qfe_bar').value = (Math.round($qfe_bar*100))/100;
}
function CalVS(x1, x2){
switch(x2){
case 'ms':
document.getElementById('ftm').value=Math.round(x1*196.8);
break;
case 'ftm':
document.getElementById('ms').value=Math.round(x1/196.8);
break;
}
}
function Calm(y1, y2){
switch(y2){
case 'km':
document.getElementById('mil').value=Math.round(y1*.539*10)/10;
break;
case 'mil':
document.getElementById('km').value=Math.round(y1*1.852*10)/10;
break;
}
}
function Cala(z1, z2){
switch(z2){
case 'ft':
document.getElementById('m').value=Math.round(z1*0.3048*10)/10;
break;
case 'm':
document.getElementById('ft').value=Math.round(z1*3.2808*10)/10;
break;
}
}
function Cals(s1, s2){
switch(s2){
case 'kt':
document.getElementById('kmh').value=Math.round(s1*1.853);
break;
case 'kmh':
document.getElementById('kt').value=Math.round(s1/1.853);
break;
}
}
</script>