Actually that square is the sun's halo.
Things look this way if fg can't load the texture-files.
I'd check out the permissions and ownership of the files and directories
in FGROOT.
Also, could you provide FlightGear's output? If it's a problem with
loading the textures there should be a message.
Well, I think we should do some PR when FlightGear makes it to 1.0.
And there's also an aniversary coming up.
So by doing some PR we could get more attention, broaden our user-base
and maybe get some more developers out of it.
>From what I can see, Curt has been doing alot of PR for the
Melchior FRANZ schrieb:
* Georg Vollnhals -- Wednesday 14 June 2006 03:02:
Take the BO105 and goo for a straight and level flight with 100-120
knts. Then push the collective down. [...]
Try it with the BO105 - see what happens?
You are not only able to hold height with pulling the stick back
* Georg Vollnhals -- Wednesday 14 June 2006 11:57:
Melchior FRANZ schrieb:
* Georg Vollnhals -- Wednesday 14 June 2006 03:02:
Take the BO105 and goo for a straight and level flight with 100-120
knts. Then push the collective down. [...] ^^^
That's translational
The discussion seems to be getting hot..Regarding the heli model: Could it represent an R/C helicopter model fine enough to synthonize an autopilot to be ported afterwards to real (R/C UAV) life?Would it work for slow velocities and near to ground flights?
Would it work for higher (not much)
Melchior FRANZ schrieb:
* Georg Vollnhals -- Wednesday 14 June 2006 11:57:
Melchior FRANZ schrieb:
* Georg Vollnhals -- Wednesday 14 June 2006 03:02:
Take the BO105 and goo for a straight and level flight with 100-120
knts. Then push the collective down. [...] ^^^
On Wed, 14 Jun 2006 11:57:39 +0200, Georg wrote in message
[EMAIL PROTECTED]:
Melchior FRANZ schrieb:
* Georg Vollnhals -- Wednesday 14 June 2006 03:02:
Take the BO105 and goo for a straight and level flight with 100-120
knts. Then push the collective down. [...]
Try it with the BO105
Unless you get REALLY small the accuracy should be the same as full
scale.
But close to the ground the ground effect makes a big difference. It
happens when aplane flies at an altitude less than half its wingspan.
Basically the air underneath can't get out and creates tremendous
additional
Hello,
the VMAP1 dataset makes a nice difference for the Bay Area. Go to:
http://mapserver.flightgear.org/
enter ICAO KPAO, and then replace several layers in the selection:
rivers_stream - rivers_vmap1
rivers_intermittentstream - intermittentrivers_vmap1
roads_road - roads_vmap1
cities_urban
Melchior FRANZ wrote:
* Georg Vollnhals -- Wednesday 14 June 2006 11:57:
Melchior FRANZ schrieb:
* Georg Vollnhals -- Wednesday 14 June 2006 03:02:
Take the BO105 and goo for a straight and level flight with 100-120
knts. Then push the collective down. [...] ^^^
Hi Y'all,
One of the things that's come up in the apt.dat discussions is whether
the taxiway layouts should be pre-clipped (meaning there are no
overlapping polygons) or overlapped (meaning polygons can overlap and
there is a well-defined draw order that makes one appear on top of another).
Hi,
In the course of developing the KC135, I noticed that parts of the autopilot
function do not work in that model, copied from the B737 - the bits
described as vor/loc and app. Investigation showed that the cause was simple
- in JSBSim a jet ac does not have vacuum system. No vacuum - no
On Wednesday 14 June 2006 16:14, bsupnik wrote:
- Pre-clipping puts more burdon on content creation tools (by requiring
them to have robust clipping to save the data) whereas not requiring
pre-clipping puts more work on data consumers.
Where are you thinking of saving the clipped data?
Back
I think the simple solution here is to modify the autopilot config so
the input is not from a vacuum driven heading indicator since you don't
have one, but from a different property that you do have.
The autopilot is designed to be very configurable in this respect and
even though it can be
In the course of developing the KC135, I noticed that parts
of the autopilot function do not work in that model, copied
from the B737 - the bits described as vor/loc and app.
Investigation showed that the cause was simple
- in JSBSim a jet ac does not have vacuum system. No vacuum -
no
Hi Paul,
For what it's worth, I'm leaning more and more toward overlapping, both
because of your arguments, stuff Curt's said, and just tossing the ideas
around...so this is a bit of a devil's advocate argument...
Paul Surgeon wrote:
Where are you thinking of saving the clipped data?
Back
Using derivations very similar to those described by Jon in his latest paper, I
have managed having my Su-26 alpha model do most of these figures :
http://aerobatics.ws/acro_figures.html
The ones that still are a little dirty for me are the tailslide and sided
loops (the former because I
Vivian Meazza wrote:
Hi,
In the course of developing the KC135, I noticed that parts of the autopilot
function do not work in that model, copied from the B737 - the bits
described as vor/loc and app. Investigation showed that the cause was simple
- in JSBSim a jet ac does not have vacuum
On Wednesday 14 June 2006 21:51, Josh Babcock wrote:
Can't you just supply whatever property regarding the vacuum system that
the instrument is looking for?
He could (which ISTR I had to do for the Lightning) but I think it would be
nice to have the correct system available too. Some aircraft
Hey toaster :-),
I love your idea of trying to simulate aerobatics correctly and I'd want
to try to help you once you're able to release the first version. I'm
not too familiar with flightgear (I'm only using it as a flight data
display) so far (especially not JSBSim, can't help you with
Curt wrote
I think the simple solution here is to modify the autopilot config so
the input is not from a vacuum driven heading indicator since you don't
have one, but from a different property that you do have.
There is one - nearly - as I said orientation/heading-magnetic-deg. But it's
not
Jon
In the course of developing the KC135, I noticed that parts
of the autopilot function do not work in that model, copied
from the B737 - the bits described as vor/loc and app.
Investigation showed that the cause was simple
- in JSBSim a jet ac does not have vacuum system. No vacuum
AJ wrote
On Wednesday 14 June 2006 21:51, Josh Babcock wrote:
Can't you just supply whatever property regarding the vacuum system that
the instrument is looking for?
He could (which ISTR I had to do for the Lightning) but I think it would
be
nice to have the correct system available
Josh
Vivian Meazza wrote:
Hi,
In the course of developing the KC135, I noticed that parts of the
autopilot
function do not work in that model, copied from the B737 - the bits
described as vor/loc and app. Investigation showed that the cause was
simple
- in JSBSim a jet ac does
On Wed, 14 Jun 2006 22:12:31 +0200 (CEST), flying.toaster wrote in
message
[EMAIL PROTECTED]:
Now for a few questions :
- Are both half wings treated separately in JSBSim ?
..AFAIK, no, yasim yes.
..2 option for JSBSim, cut your Su-26 in 2, Su-26Left and Su-26Right,
or rewrite JSBSim with
On Wed, 14 Jun 2006 12:58:09 + (UTC), Martin wrote in message
[EMAIL PROTECTED]:
Hello,
the VMAP1 dataset makes a nice difference for the Bay Area. Go to:
http://mapserver.flightgear.org/
enter ICAO KPAO, and then replace several layers in the selection:
rivers_stream -
On Wed, 14 Jun 2006 20:36:46 +0100, Lee wrote in message
[EMAIL PROTECTED]:
Ultimately though, _all_ software will be designed by AIs and
'who' will 'own' it then? :)
..mmm, after AII; AI Intuition, porcupine aviation etc. ;o)
...but until then we have both O/S C/S s/w and that's
On Wed, 14 Jun 2006 10:14:18 -0400, bsupnik wrote in message
[EMAIL PROTECTED]:
Hi Y'all,
One of the things that's come up in the apt.dat discussions is whether
the taxiway layouts should be pre-clipped (meaning there are no
overlapping polygons) or overlapped (meaning polygons can
Using derivations very similar to those described by Jon in his
latest paper, I have managed having my Su-26 alpha model do most
of these figures :
http://aerobatics.ws/acro_figures.html
The ones that still are a little dirty for me are the tailslide
and sided loops (the former because I
I say we issue everyone a GPS unit and start taking out own data :)
Josh
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Flightgear-devel@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Jon S. Berndt wrote:
But, I'm also wondering if there is a way to obtain the same effect with a
three-dimensional table. Can someone give a detailed describption of a snap
roll?
My understanding of a snap roll is that at some speed (probably well
above traditional stall speed) you command
Hi
I'm writing xml animation files for AI aircraft. I have the propeller
animation tied into the air-speed as an AI aircraft doesn't have an engine
speed.
I tied the flap and gear animations into;
/ai/models/aircraft/surface-positions/flap-pos-norm
and
Jon S. Berndt wrote:
But, I'm also wondering if there is a way to obtain the same
effect with a
three-dimensional table. Can someone give a detailed
describption of a snap
roll?
My understanding of a snap roll is that at some speed (probably well
above traditional stall speed)
Snap roll:
This is indeed the recipe for a snap roll: starting from a speed slightly
above the stall, apply a sudden yaw with the rudder, apply opposite aileron,
and pull back on the yoke. SNAP! --- One wing stalls and the plane rolls
over.
[I liked the clever use of the word, recipe with the
Sorry about that, prematurely hit send. Here is the link:http://forums.x-plane.org/index.php?showtopic=13050st=0Might be interesting, or maybe even relevant to modelling things like snap rolls in JSBSim.
Regards,Hugo Vincent.On 6/15/06, Hugo Vincent [EMAIL PROTECTED] wrote:
I came across this
This would be hard to model using lookup tables, but it might be possible
using JSBSim functions and a table or tables, together. Could be
fun. I need
to think about this one. The first idea that comes to mind is that if the
aircraft speed minus the yaw rate times some characteristic lateral
On Wed, 14 Jun 2006 20:22:05 -0500, Jon wrote in message
[EMAIL PROTECTED]:
Jon S. Berndt wrote:
But, I'm also wondering if there is a way to obtain the same
effect with a three-dimensional table. Can someone give a detailed
describption of a snap roll?
My understanding of a snap
I came across this discussion about adding a new open source FDM to
X-Plane, using CFD methods to get really really high fidelity models.
On Wed, 2006-06-14 at 20:32 -0500, Jon S. Berndt wrote:
Snap roll:
This is indeed the recipe for a snap roll: starting from a speed slightly
above the
My understanding of a snap roll is that at some speed (probably well
above traditional stall speed) you command a large nose up
elevator deflection -- if you have enough elevator authority you
can quickly force the wing to a high alpha so that the wing stalls
(at a much higher
Jon S. Berndt wrote:
Partially right:
http://www.av8n.com/how/htm/snaps.html
Rudder is involved.
The link you quote describes a situation where you get into a snap
roll/spin when you don't want to. I had something similar happen when I
was looping my R/C cub and tried to tighten up
Curt,
I can do this in many of my R/C planes. Just pull back the elevator to
Ah, how come I haven't until now realized that you're into model
aircraft...? What a great collection of models you have, too.
First I accelerate to full speed and pull the aircraft into a vertical
climb, then I
Also note that if your left wing is dropping due to being on the edge of
a stall and you try to compensate with right aileron,
Right aileron as in trying to roll to the right?
that will cause the left side aileron to deflect down.
Left aileron TED follows from right aileron TEU. The pilot
This would be hard to model using lookup tables, but it might be possible
using JSBSim functions and a table or tables, together. Could be fun. I need
to think about this one. The first idea that comes to mind is that if the
aircraft speed minus the yaw rate times some characteristic lateral
Disclaimer: my degree is in computer science, I only walk through the
aerospace engineering department on they way to my driving simulator
lab. :-)
Jon S. Berndt wrote:
Also note that if your left wing is dropping due to being on the edge of
a stall and you try to compensate with right
BUT! Had I known then what I know now and steered with the rudder
rather than the ailerons, it probably wouldn't have been nearly such a
close call.
There are a few very spectacular inadvertent stalls and spins and
suchlike in this video as well. It's actually quite funny to watch:
Maybe said a different way, imagine your wing is riding on the edge of
the amount of air it can push down without stalling. Now you deflect
the aileron down and try to push the air down even more.
Stupid me. I forgot something. OK, deflecting an aileron is like deflecting
a flap. If you look
Jon S. Berndt wrote:
Snap roll:
This is indeed the recipe for a snap roll: starting from a speed slightly
above the stall, apply a sudden yaw with the rudder, apply opposite aileron,
and pull back on the yoke. SNAP! --- One wing stalls and the plane rolls
over.
[I liked the clever use of
On Wed, 2006-06-14 at 19:34 -0500, Jon S. Berndt wrote:
All this to say that it looks very good.
Now for a few questions :
- Are both half wings treated separately in JSBSim ? That can be
important for snap rolls, even though I do them day in day out now
Yes, I know. The
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