On Wednesday 21 December 2011 14:50:39 Stuart Buchanan wrote:
> On Wed, Dec 21, 2011 at 5:53 PM, Torsten Dreyer wrote:
> >> Agreed - that's a mistake in my checkin. I will correct it.
> >>
> >> -Stuart
> >
> > OK - one more.
> > <function name="aero/function/velocity-induced-fps">
> >   <description> velocity including the propulsion induced
> > velocity.</description>
> >   <sum>
> >     <property>velocities/u-aero-fps</property>
> >     <property>propulsion/engine/prop-induced-velocity_fps</property>
> >     <property>propulsion/engine/prop-induced-velocity_fps</property>
> >   </sum>
> > </function>
> >
> > Why is prop-induced-velocity_fps added twice? Is that by intention?
> >
> >From discussion with AndersG on IRC who checked his aerodynamics text,
>
> we believe it is intentional.
>
> "the final increase in slipstream velocity (over the free stream velocity)
> is 2* the increase in velocity at the actuator disk. Which is consistent
> with the c172p FDM "
>
> -Stuart

Yes, its added twice to avoid the multiplication.

Ron

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