Re: UAV model

----- Original Message ----- 
From: Antonio Almeida
To: [email protected]
Sent: Wednesday, May 17, 2006 8:12 AM
Subject: [Flightgear-flightmodel] UAV model


>Hi everyone!

>I've been looking for a more-or-less accurate model of a UAV for JSBSim, 
>but I haven't been able to find anything... Something like the Predator 
>would be great, but anything not too specific would be just fine! Does 
>anyone have a model or know where I can find one?

>It's okay if it's just the dynamics model!
>Thanks!

    I have a pretty good RQ-1 Predator model I did for FS4K.  I used the 
data at the Rotex site to get the powerplant close to published curves.  I 
set Cdo and Oswald Efficiency experimentally to get close to published RQ-1 
data. I also worked out a Sports Aviation SS for the AC (though, that 
doesn't handle turbocharged powerplants).    I had someone else calculate 
the Stability Derivatives, some are negative compared to what an AC with a 
'normal tail' would have.

    Most of the parameters are in real values (not scaled) and can be 
written to a file containing a long list of 'AIR' file data.  Other values 
are in the FS 'aircraft.cfg'.

    Note JSBSim SD's often have a different sign convention than what is 
used by MSFS.

    Email me if you would like more info.  If you have FS I could send you 
the FD files I substituted in a freeware FS Predator.  Which also includes a 
test gauge that shows many powerplant, prop, and aerodynamic parameters.

Ron

 



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