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== Units used in OpenRocket ==
 
== Units used in OpenRocket ==
  
OpenRocket always uses internally pure SI units.  For example all rocket dimensions and flight distances are in meters, all masses are in kilograms, density is in kg/m³, temperature is in Kelvin etc.  This convention is also used when storing the design in the OpenRocket format.
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OpenRocket always uses internally pure SI units.  For example all rocket dimensions and flight distances are in meters, all masses are in kilograms, density is in kg/m³, temperature is in Kelvin etc.  This convension is also used when storing the design in the OpenRocket format.
  
 
The only exception to this rule is angles:
 
The only exception to this rule is angles:
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When displaying measures to the user, the values are converted into the preferred units of the user.  This is performed using classes in the package <tt>net.sf.openrocket.unit</tt>.  The <tt>Unit</tt> class represents a single unit and it includes methods for converting between that unit and SI units in addition to creating a string representation with a suitable amount of decimals.  A <tt>UnitGroup</tt> describes a measurable quantity such as temperature and contains the units available for that quantity, such as Celcius, Fahrenheit and Kelvin.
 
When displaying measures to the user, the values are converted into the preferred units of the user.  This is performed using classes in the package <tt>net.sf.openrocket.unit</tt>.  The <tt>Unit</tt> class represents a single unit and it includes methods for converting between that unit and SI units in addition to creating a string representation with a suitable amount of decimals.  A <tt>UnitGroup</tt> describes a measurable quantity such as temperature and contains the units available for that quantity, such as Celcius, Fahrenheit and Kelvin.
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== Rocket design loading and saving ==
 
== Rocket design loading and saving ==

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