Oleksiy Frolov | 1 Oct 06:03 2011

Re: Force instead of lift

Hello Bill

 This is a good suggestion, thank you.

 I understand about calculating 2(4) different CL-s.

 Do I also understand correctly we will than have use something you guys
did to the flaps once:

     <axis name="ROLL">
      .................
         <function name="aero/coefficient/CldF3">
            <description>
               Roll Moment Coefficient due to Asymetrical Fowler Flaps
Deflection
               calculated as difference between left and right flap lift
coef,
               times distance from centerline to MAC of surface.
            </description>
            <product>
               <value>     21.28</value>
               <difference>
                  <property>aero/coefficient/CLdF3R</property>
                  <property>aero/coefficient/CLdF3L</property>
               </difference>
            </product>
         </function>

in order to calculate the moments due to difference in individual CLs ?

(Continue reading)

Bill Galbraith | 1 Oct 14:27 2011
Picon

Re: Force instead of lift

In this case, the Cl is roll moment coefficient, not CL, the lift
coefficient

The attached file shows a new format for JSBSim files that I came up with.
It works just as well as the older format, but the formulation of the
coefficients more closely matches classical aerodynamic textbook equation
buildup. Feel free to use this, or the older format. They are both equally
valid.

Bill

> -----Original Message-----
> From: Oleksiy Frolov [mailto:Oleksiy.Frolov <at> majesticsoftware.com] 
> Sent: Saturday, October 01, 2011 12:03 AM
> To: Flight dynamics model discussions
> Subject: Re: [Flightgear-flightmodel] Force instead of lift
> 
> Hello Bill
> 
>  This is a good suggestion, thank you.
> 
>  I understand about calculating 2(4) different CL-s.
> 
>  Do I also understand correctly we will than have use 
> something you guys did to the flaps once:
> 
>      <axis name="ROLL">
>       .................
>          <function name="aero/coefficient/CldF3">
>             <description>
(Continue reading)


Gmane