> Hi Stuart,
> Thanks!
> How do you feel is the front-wheel steering (low speed, low rpm)?
> If I look from outside the wheel points to one direction but the action
> of the aircraft is very slow.
> At a little bit higher speed the a/c is sliding forward despite the
> wheel direction.
> Just a hint
> > Unfortunately, so far it only works with "solid" (unsmoothed) objects.
> > Looks like a plib bug to me, but I have yet to find the exact reason.
>
> Ahh, that would be a shame. I'm very much looking forward to see this in
> action (or better yet, see it in FlightGear).
>
> Erik
For wing flex (
> 0x0019 in ~logstream (this=0xbd3d3e8) at logstream.hxx:237
> 237 {
>
> (gdb) where
> #0 0x0019 in ~logstream (this=0xbd3d3e8) at logstream.hxx:237
> #1 0x0812a812 in ~FGFDMExec (this=0xbd3d3e8) at FGFDMExec.cpp:173
> #2 0x08113095 in ~FGJSBsim (this=0xb4b39e0) at JSBSim.cxx:308
W
When a sim reset is selected from the menu, what is the calling sequence to
the FDMs that follows? That is, which FGInterface functions are called (and
from where)? I thought that might be done from main.cxx, but I can't find it
at the moment.
Jon
___
> Move the CG forward a bit, at least a 10--15". (the correct CG location
> should be taken from the type certificate, which I haven't been able to
> find on a quick google) The plane flies a lot better then. (better
> stability and cruise alpha, when it's not flying on the stabiliser) This
> also
Here's one I'm throwing out simply for discussion, and because it's occurred
to me several times in the past:
Would it be possible to change the visual appearance of wing flex during
flight? I thought it might be interesting to give the wing an amount of flex
dependent on load factor and wing stif
> Do you have NOMINMAX defined and
>
> #ifdef HAVE_CONFIG_H
> #include
> #endif
>
> at the beginning of every .cpp/.cxx file ?
>
> -Fred
Not as far as I know. But this is straight from an unaltered current CVS
distribution of FlightGear. I've got the very latest compilers/tools from
Cygwin, so I
In trying to rebuild FlightGear under Cygwin, I'm getting all sorts of
errors now when I get to compiling the older JSBSim code, beginning with
FGDeadband.cpp. There errors are these:
stl_deque.h:446: error: expected unqualified-id before '(' token
deque.tcc:699: error: expected unqualified-id bef
>> I'm convinced Melchior aimed at pointing out that FDM-specific names
>> for non-FDM-specific properties don't belong into FlightGear.
> FlightGear supports more
> than just one FDM. There are conventions for where to find properties.
> Engine stuff is in /engines/. There are setups relying on i
On Sun, 11 Dec 2005 15:02:13 +0100
Melchior FRANZ <[EMAIL PROTECTED]> wrote:
* Dave Culp -- Sunday 11 December 2005 05:05:
The reverser method has changed. You set the reverser now by
adjusting the
"/fdm/jsbsim/propulsion/engine[x]/reverser-angle" [...]
The property "/engines/engine[x]/Rever
Anyone got a good reason why I should install W2K or XP as preferred
over the other one?
Jon
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I just installed a new video card (eVGA GeForce 6800) on my Windows
2000 box and after installing the drivers I find that OpenGL
applications crash. I've uninstalled (in safe mode) and reinstalled
(in safe mode) earlier versions of the drivers, but no luck, so far. I
am trying to find the solut
On Tue, 18 Jan 2005 16:47:04 +
Dave Martin <[EMAIL PROTECTED]> wrote:
Is anyone currently working on the b1900d FDM?
The reason I ask is that while the model is gorgeous, the FDM is
relatively broken.
I know there is a YASim model, and I've wanted to work on a JSBSim
model for some time, but
This is a bit off-topic for FlightGear-devel, but I thought it might
be worth mentioning that the first pictures from the Huygens probe
have returned from Saturn's moon Titan via Cassini relay. You can see
them here:
www.spaceflightnow.com
-and-
http://www.esa.int/esaCP/index.html
The overall f
On Wed, 12 Jan 2005 22:10:47 +0100
[EMAIL PROTECTED] (Wolfram Kuss) wrote:
Erik wrote:
This still might be useful if you can get all the moments and
coefficients from it. Then you would be able to create a JSBSim
configuration file from the model geometry.
The idea of using the gfx model you nee
In this month's AIAA monthly publication, "Aerospace America",
FlightGear receives a mention in the "Systems and Software" column.
Here is a link to that article:
www.aiaa.org/aerospace/images/articleimages/pdf/systemsjanuary05.pdf
This is the URL for Aerospace America:
http://www.aiaa.org/aeros
On Wed, 05 Jan 2005 10:17:53 -0600
"Curtis L. Olson" <[EMAIL PROTECTED]> wrote:
It's the start of a new year, so I thought it might be fun to look
back on 2004 and recall some interesting FlightGear facts and events,
and then look forward a bit to the upcoming year.
Heh. I have been meaning to p
I've encountered an unexpected problem with the class I have derived
from EasyXML. In one of the configuration files I have, the following
lines are present:
Yaw moment due to rudder
aero/qbar-psf
metrics/Sw-sq
On Fri, 17 Dec 2004 22:59:35 -
"Vivian Meazza" <[EMAIL PROTECTED]> wrote:
Lee Elliott wrote
> > [snip...]
>
> How do FDMs handle Fowler flaps? i.e. the first part of the
> action extends the flap rearwards without any rotation, acting
> only to increase wing area, then for the rest of the acti
On Fri, 17 Dec 2004 21:51:56 -
"Vivian Meazza" <[EMAIL PROTECTED]> wrote:
How do FDMs handle Fowler flaps? i.e. the first part of the action
extends the flap rearwards without any rotation, acting only to
increase wing area, then for the rest of the action rotate downwards?
Easy enough to 3
On Fri, 17 Dec 2004 11:35:24 -0800
John Wojnaroski <[EMAIL PROTECTED]> wrote:
That was it.
The other modules explicitly call out the include directive and
ifdef, but they appear to be excluded in the JSBSim files ?
seems like something is missing/mis-set on my system , if others are
not having
On Fri, 17 Dec 2004 10:05:04 -0600
"Curtis L. Olson" <[EMAIL PROTECTED]> wrote:
The FDM may choose to carry along with that abstraction (which makes
sense) because you are concerned with getting the right performance
when the lever is in the 30 degree position. It all works out in the
end, but
On Fri, 17 Dec 2004 10:07:47 -0600
"Curtis L. Olson" <[EMAIL PROTECTED]> wrote:
Jon, the problem is: how does the interface know how to normalize
the control surface positions? Where does it read the maximum limits
from? The FDM is really the only piece that is going to know this
information
On Fri, 17 Dec 2004 15:26:26 +0100
Gordan Sikic <[EMAIL PROTECTED]> wrote:
Hi Jon,
Once more, do not make general statements, based on a few examples.
Jon wrote:
One hundred percent of the control law diagrams ...
I have seen
that include pilot inputs use force.
There are _many_ FCS's out there,
On Thu, 16 Dec 2004 20:47:03 -
"Jim Wilson" <[EMAIL PROTECTED]> wrote:
Jon's concern is quite valid, but there are problems. As I work
through
these concepts in my mind, I can see that although the current
method sounds
more complicated for the 3D animator, having to deal with the real
On Thu, 16 Dec 2004 18:21:24 +0100
Gordan Sikic <[EMAIL PROTECTED]> wrote:
I have seen (and I've seen more than few) control law diagrams
taking some generalized input (0-1 range), taking target speed, or
attitude, or something,... but havent seen any, taking as a input
force that pilot has to p
On Thu, 16 Dec 2004 11:15:52 -0800
Richard Harke <[EMAIL PROTECTED]> wrote:
A rotation whether in degrees or radians only makes sense if the
axis of rotation is specified. This would have to be on a per aircraft
basis. Also I'm sure that many if not most control surfaces do not
simply rotate abo
Curt wrote:
But Jon, this statement seems to run counter to your overall
argument. Slats at least on many of the aircraft I've seen deploy
linearly. In other words they are on some sort of rail mechanism
and slide out away from the leading edge of the wing in a linear
motion. They aren't at
On Wed, 15 Dec 2004 14:51:07 -0500
"Norman Vine" <[EMAIL PROTECTED]> wrote:
Jon S Berndt writes:
This is irrelevant, also - at least for JSBSim.
That is an excellent observation
FGFS is more then JSBSim though :-)
Norman
Absolutely. And JSBSim is used by more than FlightGear -
On Wed, 15 Dec 2004 14:51:07 -0500
"Norman Vine" <[EMAIL PROTECTED]> wrote:
Jon S Berndt writes:
This is irrelevant, also - at least for JSBSim.
That is an excellent observation
FGFS is more then JSBSim though :-)
Norman
Absolutely. And JSBSim is used by more than FlightGear -
On Wed, 15 Dec 2004 14:51:07 -0500
"Norman Vine" <[EMAIL PROTECTED]> wrote:
Jon S Berndt writes:
This is irrelevant, also - at least for JSBSim.
That is an excellent observation
FGFS is more then JSBSim though :-)
Norman
Absolutely. And JSBSim is used by more than FlightGear -
On Wed, 15 Dec 2004 14:51:07 -0500
"Norman Vine" <[EMAIL PROTECTED]> wrote:
Jon S Berndt writes:
This is irrelevant, also - at least for JSBSim.
That is an excellent observation
FGFS is more then JSBSim though :-)
Norman
Absolutely. And JSBSim is used by more than FlightGear -
On Wed, 15 Dec 2004 14:51:07 -0500
"Norman Vine" <[EMAIL PROTECTED]> wrote:
Jon S Berndt writes:
This is irrelevant, also - at least for JSBSim.
That is an excellent observation
FGFS is more then JSBSim though :-)
Norman
Absolutely. And JSBSim is used by more than FlightGear -
On Wed, 15 Dec 2004 11:16:32 -0800
"John Wojnaroski" <[EMAIL PROTECTED]> wrote:
And then there are slats that deploy as a function of airspeed/AOA;
e.g; Sabreliners
This is irrelevant, also - at least for JSBSim. In this case, the
slats would be automatically deployed as directed by the flight
On Wed, 15 Dec 2004 18:22:30 -
"Vivian Meazza" <[EMAIL PROTECTED]> wrote:
There are several points here.
1. The fact is that most 3d (I think all, but I haven't checked)
rightly or wrongly already use normalized values. It would be a
significant task to change.
Agreed. This is a considerati
On Wed, 15 Dec 2004 12:30:25 -0500
"Norman Vine" <[EMAIL PROTECTED]> wrote:
Curtis L. Olson writes:
I think we are limiting the discussion here to only flying control
surface positions, i.e.
As you point out those are only a small subset of the
Control class abstaction.
So specialize these if e
On Wed, 15 Dec 2004 17:21:13 -
"Vivian Meazza" <[EMAIL PROTECTED]> wrote:
A quick search revealed that most, if not all, the 3d models in the
current inventory use normalized values for animating the control
surfaces.
See, this further raises a red flag for me. How does the 3D model know
ho
On Wed, 15 Dec 2004 12:01:23 -0500
"Norman Vine" <[EMAIL PROTECTED]> wrote:
It is realy quite simple
you either have
1) an abstract class with 'Normalized units'
class Control
or
2) a bunch of specalized classes
class Angle_Controller
class Toggle_Controller
class Percentage_Controller
etc
On Wed, 15 Dec 2004 10:41:27 -0500
"Norman Vine" <[EMAIL PROTECTED]> wrote:
Jim Wilson writes:
And the Simgear 3D animation code is all about taking those
normalized values
and translating them to a representation of degrees movement. On
the surface,
this doesn't make sense to me either.
I can
On Wed, 15 Dec 2004 09:10:03 -0500
David Megginson <[EMAIL PROTECTED]> wrote:
A Piper owner trying to have is PA-28-201 (Arrow) repaired managed
to get this concrete information from Piper:
Dear Sir:
There is not an off-set of the vertical fin or the stabilator on the
PA28R-201. The fin is shoul
Does FlightGear have a "tracking camera" view at this time? What I am
getting at is this: say I have a vehicle that I want to fly in a
scripted manner. Can I select a camera that will automatically track
the vehicle as it flies?
Jon
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Is there a clean way to move files in a CVS repository from one
directory to another for a reorganization?
Jon
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On Fri, 3 Dec 2004 16:03:13 +0100
[EMAIL PROTECTED] (Gerhard Wesp) wrote:
Primary objective is to run FlightGear rock solidly (need it as a
front end/testing environment) for my own FDM).
Why your own FDM? Don't get me wrong - I think there are a lot of
reasons why someone would want to write the
On Mon, 22 Nov 2004 15:29:36 -0600
"Curtis L. Olson" <[EMAIL PROTECTED]> wrote:
Jon S Berndt wrote:
I don't think we need to kill ourselves trying to be overly
flexible. I think it's worth having a central repository of commonly
used items (engines, instruments, etc.
On Mon, 22 Nov 2004 15:02:09 -0600
"Curtis L. Olson" <[EMAIL PROTECTED]> wrote:
How hard would it be to allow aircraft to live in an arbitrary
structure underneath data/Aircraft?
From a JSBSim FDM point of view, I've been giving this some thought
with respect to standalone JSBSim, as well. There
On Mon, 22 Nov 2004 21:10:36 +0100
Erik Hofman <[EMAIL PROTECTED]> wrote:
Currently there is a problem where different platforms, different
OS's or even different compilers can get different output due to the
fact that structs are used to send data across the network. This can
create endian-pro
"The Ultimate Interface to the Planet":
http://www.keyhole.com/
Jon
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On Wed, 10 Nov 2004 12:43:37 -0800
Adam Dershowitz <[EMAIL PROTECTED]> wrote:
Finally, I noticed something else. I am not sure who the maintaineris.
That would probably be me ... :-)
But in JSBSim/Makefile.solo (not required for FG, but good for other
things.) there is a typo. That will not allow
I would go the other way around, implement FlightGear's FDM socket
communication protocol for JSBSim and run it as a stand-alone FDM
that feeds FlightGear with it's data.
Erik
I like this idea a lot - but I'm not quite sure how to proceed on
this. Do you have any ideas to throw out on how this
I got a request to implement something I've been considering
implementing for some time, anyhow. JSBSim has the ability to run
scripted flights. Scripts are composed in an XML-format command file.
This works quite well for JSBSim in a standalone mode. I have yet to
try to implement this in JSBS
-atan2(-phi,theta)
This looks *very* strange. An arc tangent of a quotient of angles??
Although it works out dimension-wise, I've never seen a quotient of
angles in any formula.
Cheers
-Gerhard
Think of them as distances, really. It was meant to be the X and Y
component of the rotated Z axis proj
Very bizarre:
http://www.cnn.com/2004/TECH/11/02/brain.dish/index.html
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More:
theta phi heading magnitude
45.00 0.000.0045.00
45.00 -45.00 45.0075.00
0.00 -45.00 90.0045.00
-45.00 -45.00 135.0075.00
-45.00 0.00 -180.0045.00
-45.00 45.00 -135.0075.00
0.00 45.00 -90.0045.00
45.00 45.00 -45.0075.00
45.00 0.0
On Wed, 03 Nov 2004 16:02:19 -0600
"Jon S Berndt" <[EMAIL PROTECTED]> wrote:
On Wed, 3 Nov 2004 16:47:37 -0500
David Megginson <[EMAIL PROTECTED]> wrote:
After having scribbled for a LITTLE WHILE on the back of an envelope
;-) I am thinking that what you want is this:
-ata
On Wed, 3 Nov 2004 16:47:37 -0500
David Megginson <[EMAIL PROTECTED]> wrote:
After having scribbled for a LITTLE WHILE on the back of an envelope
;-) I am thinking that what you want is this:
-atan2(-phi,theta)
but I'll have to play a little bit more. I think this would give you
the angle about t
On Wed, 3 Nov 2004 16:47:37 -0500
David Megginson <[EMAIL PROTECTED]> wrote:
What does arctan(-phi/theta) give you?
Jon
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On Wed, 03 Nov 2004 15:28:26 -0600
"Curtis L. Olson" <[EMAIL PROTECTED]> wrote:
I think you're on the right track. I think you want to determine the
orientation of the aircraft body Z axis w.r.t. the local vertical
axis. That can tell you both the magnitude and direction of the most
vertical as
On Wed, 3 Nov 2004 14:05:59 -0500
David Megginson <[EMAIL PROTECTED]> wrote:
I've thought of a simpler way to approach this problem. Let's say
that I have a plane and the three Euler angles of rotation, phi,
theta, and psi (roll, pitch, and yaw). Given those three angles, I'd
like to determine w
On Tue, 02 Nov 2004 12:37:40 -0600
"Curtis L. Olson" <[EMAIL PROTECTED]> wrote:
Has anyone played around with any of these options who can report
success or failure or something in between? What kind of performance
are you getting?
I recall a couple years ago I was running two 17" monitors off
On Mon, 01 Nov 2004 21:09:39 +0100
Erik Hofman <[EMAIL PROTECTED]> wrote:
Jon S Berndt wrote:
Is anyone aware of a command line C++ code debugger? Particularly
one that runs under IRIX?
If you mean something like gdb for Linux: xdb
Erik
Has anyone used ddd? Does KDevelop compile under IRI
Is anyone aware of a command line C++ code debugger? Particularly one
that runs under IRIX?
Jon
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On Wed, 27 Oct 2004 15:18:46 -0500
David Culp <[EMAIL PROTECTED]> wrote:
Some notes on making an AI carrier.
The FDM will have to be changed to allow the aircraft to sit on a
deck without
the deck sailing away from under it. The difference between the
aircraft's
and carrier's velocity vector
Interesting story about the Airbus crash in a New York suburb in
November of 2001:
http://www.cnn.com/2004/US/10/26/ntsb.flight587.ap/index.html
"Benzon also said that investigators found that American Airlines
improperly trained its pilots to use the aircraft's rudder while
recovering from ups
Would it be "grumpy" of me to suggest that we try a little harder to
trim quotes when replying with quotes? I've noticed that there are
several emails today with 100 to 200 lines of quoted material,
followed by anywhere from a few lines to ten or so. Over time, this
stuff builds up...
Jon
On Thu, 21 Oct 2004 01:26:54 +0800
"" <[EMAIL PROTECTED]> wrote:
I am working on a autopilot project and we need a flight simulator
to prove
our control method before use it on a real aircraft. Is there any
interface to
get the attitude of aircraft from and send control data to
flightgear. I
I've been wondering about easyXML, if it can be modified to support
validation against a DTD? Since it is built on top of eXpat - and I
believe eXpat _can_ be compiled to provide validation - is this just a
matter of proper compilation of the eXpat library?
I ask because it is becoming clear to
On Fri, 24 Sep 2004 19:55:54 +0200
Boris Koenig <[EMAIL PROTECTED]> wrote:
Also, regarding the whole terrorist issue that you mentioned:
terrorists usually have the funding available to really use
*professional tools*, so the 9/11 terrorists did not only fool
around with a version of Micro$oft's f
Regarding a 737 autopilot, I thought I'd write some comments, here.
Having discussed with Dave C. recently some of the autoflight and/or
flight management features of the 737NG airliner, I have investigated
using the JSBSim components to model some aspects of these systems. I
found that these sy
On Wed, 01 Sep 2004 11:54:08 -0700
Alex Romosan <[EMAIL PROTECTED]> wrote:
you need to have the expat library installed (+ the header files) but
then you can use just easyxml.cxx from simgear with the following
patch applied:
--- easyxml.cxx 29 Jul 2004 08:30:10 - 1.4
+++ easyxml.cxx 1 Se
On Fri, 20 Aug 2004 22:01:43 +0200
"Frederic Bouvier" <[EMAIL PROTECTED]> wrote:
I think Jon wants to preserve the current JSBsim syntax and not use
the property syntax.
-Fred
Well, perhaps. The thing is, certain items that would be parsed from
the configuration file, such as landing gear, aero c
On Fri, 20 Aug 2004 21:40:28 +0200
Mathias Fröhlich <[EMAIL PROTECTED]> wrote:
On Freitag, 20. August 2004 21:10, Jon S Berndt wrote:
But also an aircraft is built like such a tree. The top node is the
Some aircraft are even built OUT OF trees. ;-)
aircraft itself. This one
On Fri, 20 Aug 2004 20:55:18 +0200
Mathias Fröhlich <[EMAIL PROTECTED]> wrote:
On Freitag, 20. August 2004 18:48, Jon S Berndt wrote:
Can someone tell me what the process is once a file has been opened
and is being parsed by EasyXML? What do the callbacks do ... what is
the standard procedu
Can someone tell me what the process is once a file has been opened
and is being parsed by EasyXML? What do the callbacks do ... what is
the standard procedure for reading in the attibutes and elements and
data?
Jon
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On Fri, 20 Aug 2004 09:37:29 -0500
"Jon S Berndt" <[EMAIL PROTECTED]> wrote:
to solve this. I'll cross-post to flightgear-devel - someone there
may have a clue.
Jon
Disregard this - I goofed.
Jon
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On Fri, 20 Aug 2004 15:58:29 +0200
Steven Beeckman <[EMAIL PROTECTED]> wrote:
I've checked the latest CVS snapshot from SimGear.org, and even there
I find 2 readXML-methods in easyxml.hxx, so that won't be the
problem. I've commented out the readXML-method with 3 arguments in
easyxml.hxx, which
On Wed, 4 Aug 2004 23:04:16 +0200
Melchior FRANZ <[EMAIL PROTECTED]> wrote:
Good idea. I'll try that. Thanks.
Get some sleep, first !!
:-)
Jon
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"Jim Wilson" wrote:
If it wasn't for the great work on JSBsim and YASim we'd have very
few aircraft. But I think those config files, along with the "source
code" that ends up interpreting and processing them, both make up the
FDMs.
There is considerable skill and effort involved in producing ac
Properties = text strings bound to variables or access methods.
Property manager maintains a list of these.
How is the lookup done when a property value is retrieved (assuming
the desired property to be looked up is referenced by the text
string)?
I wondered if an STL map is used?
Jon
__
On Thu, 29 Jul 2004 19:38:44 +0200
Erik Hofman <[EMAIL PROTECTED]> wrote:
(Now I start to wonder why we always smash our probes on the surface
of Mars).
NASA does it by design.
(Well ... except for the Mars Polar Lander.)
:-)
Jon
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On Thu, 29 Jul 2004 19:37:08 +0200
Boris Koenig <[EMAIL PROTECTED]> wrote:
I like it when people share their valuable experiences ... :-)
So, the next time I'm there I'll be careful !
Why? You won't hit anything! :-)
Jon
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On Thu, 29 Jul 2004 10:34:16 -0500
"Curtis L. Olson" <[EMAIL PROTECTED]> wrote:
Ok, then how do you explain a frisbee that can curve either way, even
though it's always thrown with the same direction of spin. And
please include the coriolis effect in your explanation (now that it
is implimente
On Thu, 29 Jul 2004 15:01:28 -
"Jim Wilson" <[EMAIL PROTECTED]> wrote:
Jon Berndt wrote:
> One more thing: think of a baseball or better yet a lightweight
> ball. How do those things curve?
Well "Jim's make it up as you go along Physics manual" says that there is
greater pressure against the
On Wed, 28 Jul 2004 23:16:05 +0100
Lee Elliott <[EMAIL PROTECTED]> wrote:
Although it might not be accurate in my model, the B-52 wing is set
at six deg
incidence, and while it does fly a little nose-down in some
circumstances,
six deg worth would be worrying;) Heh - not that I haven't seen
On Wed, 28 Jul 2004 23:55:09 +0200
Erik Hofman <[EMAIL PROTECTED]> wrote:
Jon S Berndt wrote:
That's because it's _mostly_ (or entirely) the "sucking" action above
the wing that contributes the most to lift.
No, that is the *result* of lift, not the *cause*.
Erik
No,
On Wed, 28 Jul 2004 23:28:55 +0200
Erik Hofman <[EMAIL PROTECTED]> wrote:
Jon S Berndt wrote:
No, not really. See:
http://www.av8n.com/how/htm/airfoils.html#sec-consistent
Try this for a start:
An airflow over the wing is causing the downwash at the end of the
airfoil. The airflow bel
On Wed, 28 Jul 2004 22:56:59 +0200
Erik Hofman <[EMAIL PROTECTED]> wrote:
This is exactly the reason why pressure is build up underneath the
wing (pushing the airfoil up on air molecules == force).
No, not really. See:
http://www.av8n.com/how/htm/airfoils.html#sec-consistent
Excerpt:
"Of course
On Wed, 28 Jul 2004 14:52:24 -0400
David Megginson <[EMAIL PROTECTED]> wrote:
The important thing to note is that the airflow *above* the wing also
curves down, not just the airflow below it. That is why, even with
the same incidence angle, the hstab sees a different angle of attack
in the win
On Wed, 28 Jul 2004 14:15:04 -0400
"Norman Vine" <[EMAIL PROTECTED]> wrote:
This is a 100 year old argument :-)
http://hyperphysics.phy-astr.gsu.edu/hbase/fluids/airfoil.html
If you really want to know read everything you can wriiten by
Koukowskii and Prandtl
Is light a wave or a particle?
:-)
___
On Tue, 28 Jun 2005 19:20:17 +0100
SGMINFO <[EMAIL PROTECTED]> wrote:
David Megginson wrote:
> I'm getting seriously out of my depth here, since I didn't even
take high
> school physics...
Just a lurker at present until I can find a way to contribute more
usefully but try this...
http://www.
On Wed, 28 Jul 2004 17:25:31 -
"Jim Wilson" <[EMAIL PROTECTED]> wrote:
Richard Bytheway said:
Well as a physicist (but with no formal aeronautical education), I
always
think of it as the wing is pushing air down, which causes an "equal
and
opposite force" (to quote Newton) of the air pushin
On Fri, 23 Jul 2004 16:07:17 -
"Jim Wilson" <[EMAIL PROTECTED]> wrote:
It has been a while since this feature was added, but I thought Jon
might
like to know that using his VRP feature I've succeeded in positioning
the
Cessna 310 (U-3A) visual model identically under both JSBSim and
YASim
On Fri, 23 Jul 2004 16:05:13 +0100
Al West <[EMAIL PROTECTED]> wrote:
On Friday 23 July 2004 15:21, Jon Berndt wrote:
I'll stop whining, now. ;-)
I was able to build simgear and flightgear with the OpenAL libs.
I've built it fine too - acutally being able to run it is a different
matter.
Is i
On Thu, 22 Jul 2004 12:36:40 -0700
John Wojnaroski <[EMAIL PROTECTED]> wrote:
Curtis L. Olson wrote:
John Wojnaroski wrote:
Trying a build of the latest pre-0.9.5 release...
SimGear compile fails on sample_openal implicit declaration of
alGetsourcei(...) and alutLoadWAVFile()
Searched the includ
On Thu, 22 Jul 2004 20:17:34 +0200
Durk Talsma <[EMAIL PROTECTED]> wrote:
What kind of problems did you see? I've sent a lot of changes to Erik
about
two weeks ago. That update fixed a lot of stuff, including the
autopilot,
which makes it a lot easier to fly. The CVS version is a little heavy
On Mon, 19 Jul 2004 18:07:43 +0100
"Vivian Meazza" <[EMAIL PROTECTED]> wrote:
I've just downloaded the current cvs version of SimGear and
FlightGear. They both compile under Cygwin straight out of the box.
I would suppose that you have a problem with your path.
Possibly, but I am using the same
On Thu, 8 Jul 2004 14:03:14 +0100
"Vivian Meazza" <[EMAIL PROTECTED]> wrote:
Jon Berndt wrote
Sent: 08 July 2004 13:29
To: FlightGear developers discussions
Subject: RE: [Flightgear-devel] status of aircraft carrier
> In my day they consisted of a pulley system forcing hydraulic
fluid
> through
On Wed, 7 Jul 2004 22:50:40 +0100
"Vivian Meazza" <[EMAIL PROTECTED]> wrote:
Hmm, bolted? Don't forget that the cat force is adjusted for the
aircraft type and launch weight.
It would have to be modelled as a spring
force acting on the nose gear to be correct. Even that's not
quite good enoug
On Wed, 07 Jul 2004 15:12:05 -0400
David Megginson <[EMAIL PROTECTED]> wrote:
Once we support ground reactions with a moving surface (like the deck
of a ship), why not just model the catapult as a faster moving
surface?
That would supply only a sliding friction force to the tires, which
would b
On Wed, 7 Jul 2004 19:12:11 +0200
Mathias Fröhlich <[EMAIL PROTECTED]> wrote:
On Mittwoch, 7. Juli 2004 18:59, Andy Ross wrote:
The only "special" hardware on the carrier are the arresting wires
and
catapults. It would be easier to just model these and let generic
intersection code handle the de
On Wed, 7 Jul 2004 17:35:31 -
"Jim Wilson" <[EMAIL PROTECTED]> wrote:
Mathias Fröhlich said:
On Mittwoch, 7. Juli 2004 17:30, Jim Wilson wrote:
> There doesn't seem to be support for the std::numeric_limits
references
> added in the June update. Can we work around this?
Done in JSBSim's cvs
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