> Now I am getting confused. I need an example.
>
> Say if I have the following entry:
> <function name="aero/coefficient/CDo">
> <description>Drag_at_zero_lift</description>
> <product>
> <property>aero/qbar-psf</property>
> <property>metrics/Sw-sqft</property>
> <value>0.016</value>
> </product>
> </function>
>
> What does this do? What does 0.016 signify?
>
> Ampere
Ampere,
In your example, the following modified version would be a *coefficient*
definition,
<function name="aero/coefficient/CDo">
<description>Drag_at_zero_lift</description>
<product>
<value> 0.016 </value>
</product>
</function>
But, that has to be turned into a force through multiplication by wing area
and dynamic pressure:
<property>aero/qbar-psf</property>
<property>metrics/Sw-sqft</property>
We are assuming that the CDo coefficient value is a constant 0.016. So, the
definition of the example you gave, above, is actually a force. So, more
properly, this would be defined as a "force", e.g.:
<function name="aero/force/CDo">
<description>Drag_at_zero_lift</description>
<product>
<property>aero/qbar-psf</property>
<property>metrics/Sw-sqft</property>
<value>0.016</value>
</product>
</function>
Is that more clear?
Jon
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