Dave Culp wrote:
But it doesn't. Seems like an oversight to me. I'm trying to model a
'plane with almost no dihedral AFAICS and I'm not sure what to twiddle
in the .xml file to get that effect.
My advice is don't worry about it. Is there something about the way the
Colditz
The textbook solution for straight wings is that 1 degree of positive
dihedral
adds approximately .0002 to Cl, the rolling moment coefficient . This
would
be added to the Clb coefficient in the input file, since it is sideslip
that generates
the effect.
I use an old copy of Perkins and
Dave Culp wrote:
On Thursday 11 May 2006 11:08 am, Steve Hosgood wrote:
Deriving the parameters like "yaw
moment due to beta" and other such magic numbers from physical
parameters is going to be pretty non-trivial.
You can use "common numbers" from some hard to find
I'm
working on a thorough document now, but I still only hav e alittle psare time in
which to write it. :-(
Jon
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On Friday 12 May 2006 08:21 am, Steve Hosgood wrote:
What I meant was, regardless that most of the physical measurements are
missing from jsbsim's .xml files, **Aeromatic** should have a way of
specifying them so that it can produce the right magic coefficients.
Yet it doesn't. Aeromatic is
On Tuesday 16 May 2006 11:40 am, Steve Hosgood wrote:
Trouble is, most aircraft modellers would struggle to work out what
those effects are. So we might expect that Aeromatic (which is the
compiler if you like) actually takes in a value for dihedral and works
out the magic numbers for the
Jon S. Berndt wrote:
I just *know* I'm going to get totally flamed for this, but can someone
please tell me how the CG, Eyepoint, AERORP and VRP are interconnected?
Yeah, I know - RTFM.
I'd say that, but there really isn't much of one, yet! :-(
You won't get flamed. It's
Steve Hosgood wrote:
Before I say anything, I'd like to commend you Jon, along with Dave Culp
and Erik Hofman for your three replies to my original question. *None*
of you flamed me or anyone else, and answered pretty much all my
questions really neatly.
You're not subscribed to [EMAIL
Steve Hosgood wrote:
Before I say anything, I'd like to commend you Jon, along with Dave Culp
and Erik Hofman for your three replies to my original question. *None*
of you flamed me or anyone else, and answered pretty much all my
questions really neatly.
You're not subscribed to
From: Erik Hofman
Steve Hosgood wrote:
I just *know* I'm going to get totally flamed for this, but can someone
please tell me how the CG, Eyepoint, AERORP and VRP are interconnected?
Yeah, I know - RTFM.
It basically comes down to this, *you* decide where (0,0,0) is
referenced and
On Thursday 11 May 2006 04:56 am, Steve Hosgood wrote:
Do you confirm that the AERORP is the point from which the tail arm
and rudder arm are referenced? Since it doesn't seem possible to
specify a wing arm, do I assume that the AERORP must be sited at the
0.25 chord point of the main wing?
On Thursday 11 May 2006 11:08 am, Steve Hosgood wrote:
Things are becoming a bit more transparent. Trouble is, an aircraft
modeller usually starts by knowing just physical parameters (location of
wings and things, location of tail, rudder etc along with amount of
dihedral, angle of incidence
I just *know* I'm going to get totally flamed for this, but can someone
please tell me how the CG, Eyepoint, AERORP and VRP are interconnected?
Yeah, I know - RTFM.
Trouble is, I think I did R the FM (there was an article by Jon S.
Berndt himself in Issue 1, Vol1 of the Quarterly Newsletter)
On Wednesday 10 May 2006 11:43 am, Steve Hosgood wrote:
Where is this other point? Just some arbitrary convenient point?
yes
I think I know what the eyepoint is :-). It is specified with an
[X,Y,Z] too, but in what coordinate frame?
same as above
Likewise the VRP. This is the location
I just *know* I'm going to get totally flamed for this, but can someone
please tell me how the CG, Eyepoint, AERORP and VRP are interconnected?
Yeah, I know - RTFM.
I'd say that, but there really isn't much of one, yet! :-(
You won't get flamed. It's not the easiest concept to figure out.
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