VSP/VorView control surfaces
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DanielG
Mar 29, 2012, 11:05:25 AM3/29/12
to OpenVSP
Hello,
I was reading some VorLax documentation* and found this:
“Simple leading or trailing edge flaps may be modeled in the program.
Experience with the program has indicated that these flaps should be
simulated by defining a new flap panel rather than by modifying the
wing camber line. The lateral edges of the flap panel should be at
the same spanwise locations as the wing panel, as shown in figure 4.
When the flap is defined as a separate panel, changes in flap
deflection are easily made using the input parameters AINC1 and
AINC2.”
Why does VSP/VorView use the camber line method? Does it really make
a difference?
Thanks,
Daniel
*Source:
Martin, Glenn. “Paneling Techniques for the Use with the VorLax
Computer Program”. Vought Corporation, April 1978.
I was reading some VorLax documentation* and found this:
“Simple leading or trailing edge flaps may be modeled in the program.
Experience with the program has indicated that these flaps should be
simulated by defining a new flap panel rather than by modifying the
wing camber line. The lateral edges of the flap panel should be at
the same spanwise locations as the wing panel, as shown in figure 4.
When the flap is defined as a separate panel, changes in flap
deflection are easily made using the input parameters AINC1 and
AINC2.”
Why does VSP/VorView use the camber line method? Does it really make
a difference?
Thanks,
Daniel
*Source:
Martin, Glenn. “Paneling Techniques for the Use with the VorLax
Computer Program”. Vought Corporation, April 1978.
DanielG
Mar 30, 2012, 7:03:15 PM3/30/12
to OpenVSP
I did some tinkering today and answered my own question.
The modeling method used in VSP/Vorview is ok for control surfaces if
your deflections are less than 20 degrees or so.
At angles greater than 20 degrees (flaps, for instance) you want model
the deflecting surface as a separate panel. VorLax will capture
nonlinear effects this way, but miss it with the mean camber line
method.
I'd like to share pictures of the models and the CM plot... Is there a
way that the google group can host the files?
Daniel
The modeling method used in VSP/Vorview is ok for control surfaces if
your deflections are less than 20 degrees or so.
At angles greater than 20 degrees (flaps, for instance) you want model
the deflecting surface as a separate panel. VorLax will capture
nonlinear effects this way, but miss it with the mean camber line
method.
I'd like to share pictures of the models and the CM plot... Is there a
way that the google group can host the files?
Daniel
Andrew Hahn
Apr 26, 2012, 12:12:03 PM4/26/12
to ope...@googlegroups.com
This was really good work and I am glad that you want to share with the community.
This may be a feature of the "New Google Groups" that wasn't available before, but if you reply to this, then you will see an "Attach a file" link just above.
Give it a try.
This may be a feature of the "New Google Groups" that wasn't available before, but if you reply to this, then you will see an "Attach a file" link just above.
Give it a try.
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