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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
calculations 2moa off, need advice
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<blockquote data-quote="LouBoyd" data-source="post: 398831" data-attributes="member: 9253"><p>Applied Data Science makes a little USB device which outputs air density direclty . It's $159 and outputs a bunch of parameters in in ASCII. It calculates air density internally from three sensors which measure absolute air pressure, air temperature, and humidity. It can be used with just about any modern computer operating system and comes with Windows sofware. XP or newer) </p><p><a href="http://www.appdatsci.com/webpages/airtool2.htm" target="_blank">Applied Data Sciences / AirTool II</a></p><p></p><p>There are also mechanical air density gages. They're commonly used for tuning racing engines. They're a little over $100 and don't need power or a computer. They're somwhat delicate, like a mechanical watch. It works by actually weighing a small volume of air with a balance and a weak spring. </p><p><a href="http://www.summitracing.com/parts/LNG-50888" target="_blank">Longacre Racing Products 50888 - Longacre Air Density Gauges - Overview - SummitRacing.com</a></p><p></p><p>I have both I believe the two methods are about equally accurate (under 5% error). Neither require additional information like elevation or local barometric pressure.</p></blockquote><p></p>
[QUOTE="LouBoyd, post: 398831, member: 9253"] Applied Data Science makes a little USB device which outputs air density direclty . It's $159 and outputs a bunch of parameters in in ASCII. It calculates air density internally from three sensors which measure absolute air pressure, air temperature, and humidity. It can be used with just about any modern computer operating system and comes with Windows sofware. XP or newer) [url=http://www.appdatsci.com/webpages/airtool2.htm]Applied Data Sciences / AirTool II[/url] There are also mechanical air density gages. They're commonly used for tuning racing engines. They're a little over $100 and don't need power or a computer. They're somwhat delicate, like a mechanical watch. It works by actually weighing a small volume of air with a balance and a weak spring. [url=http://www.summitracing.com/parts/LNG-50888]Longacre Racing Products 50888 - Longacre Air Density Gauges - Overview - SummitRacing.com[/url] I have both I believe the two methods are about equally accurate (under 5% error). Neither require additional information like elevation or local barometric pressure. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
calculations 2moa off, need advice
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