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On Sat, 2 Jun 2007, Torsten Dreyer wrote:
http://www.t3r.de/fg/lt2007/dragonfly_an225.jpg
Was that me in the 225? ;) I did take off with it from EDDI/09L on Friday.
(Didn't notice
On Mon, 28 May 2007, Stuart Buchanan wrote:
FYI - the control is generally called the control bar, or if including
the attachment to the wing pivot A-frame.
(AKA speed bar.) I don't think of the speedbar as a control irl, but
rather as an extension of the wing. The control, the stick, is my
On Thu, 24 May 2007, Andy Ross wrote:
Joacim Persson wrote:
README.yasim says the semi-deprecated transition-time is Time in
seconds to slew through input range. I'm not quite sure what it is,
but it's not that. ;)
It's coded to assume that the input range is 0-1.
From experimenting
On Fri, 25 May 2007, leee wrote:
http://www.air-and-space.com/Antonov%20An-225%20Mriya.htm
it's the rear four sets. This site also has some nice pics of the main gear,
which show that the front three and rear four units are different, if anyone
would like to make more detailed and accurate
Patch attached.
Added steering to the four aftmost main gear axels -- with animations!
Found out just the other day that the AN-225 indeed steers on some of the
main gear wheels. The minimum turning radius is a wild guess however.
(Assumed a 45 deg average on the nose gears.) It now turns
On Wed, 7 Mar 2007, Ron Jensen wrote:
I hand massaged the pitch to 17/32 as in the original file, and I
lowered the diameter from 141.7 to 132 because it wouldn't start with
141.7 as a diameter.
That (132in) is the correct diameter for the AV-2 propeller. (132 inches or
3.35 meters) Source:
On Fri, 2 Mar 2007, John Denker wrote:
On 03/01/2007 02:19 PM, AJ MacLeod wrote:
Was the stuff at line 300 intended to be in there?
Actually yes, I put the call-trace in there for a reason, and I left
it in there for a reason. I thought that in the future, some folks
might find it helpful
On Tue, 20 Feb 2007, Holger Wirtz wrote:
Is there something like a smooth factor for weather changes?
Alas, no. I worked a bit on a hack a while ago to smoothen out the wall
of weather somewhat, but got stuck on certain weather properties that
simply couldn't see how they were set. Some stuff
On Thu, 1 Feb 2007, leee wrote:
On Thursday 01 February 2007 00:35, Curtis Olson wrote:
For what it's worth, if someone wanted to adapt one of our existing fdm's
to do automotive vehicle dynamics, that would be a cool thing.
It had occurred to me that YASim could be (ab)used to fake a car.
On Thu, 1 Feb 2007, Curtis Olson wrote:
It's somewhat of a complex C++ inheritance maze to wade through,
Affirmative. ;) Looking at the code I can tell there's years of development
in layers on top of each other there, not entirely consistent with a one
and same philosophy.
I'm not a big fan
On Tue, 30 Jan 2007, Tony Pelton wrote:
and as a passing comment, i wonder if one of the train simulators
might be a better train simulator that flightgear for your intended
purpose ...
Or better still, a car simulator. (Assuming the mentioned train crossing
signs are to be viewed from the
On Tue, 30 Jan 2007, Ampere K. Hardraade wrote:
Just thought I should bring this to the list's attention:
http://forums.avsim.net/dcboard.php?az=show_mesgforum=198topic_id=2326mesg_id=2352page=
Can this have something to do with the nforce (Intel 8x0?) audio chip's
inability to do 8-bit mono?
On Fri, 26 Jan 2007, Stewart Andreason wrote:
Hi Ampere,
Actually creating a cloaking device isn't that difficult,
Ha! You can run but you can't hide from the PS-05/Blue Vixen radar. ;)
-
Take Surveys. Earn Cash.
scenery.flightgear.org is down again
Since the scenery data is mirrored on a number of other ervers, would
it be possible to provide an rsync interface on some of these mirrors
aswell? I reckon it would both improve availability and spread the load
from the primary terrasync server. (And probably
On Fri, 5 Jan 2007, Maik Justus wrote:
Hello,
sometimes I get a segfault in function
SGShaderAnimation::~SGShaderAnimation(), file
simgear/scene/model/shadanim.cxx.
I never get a SIGSEGV from there, but rather a SIGABORT due to a failed
assert. (This with plib, nota bene) And from the
Some feedback:
* Nice plane to fly. (Perhaps a bit too forgiving in a stall?)
* Impossible to taxi. I noticed the friction coefficients for the main
gear wheels are significantly lower (dfric=0.06 sfric=0.10) than for
the tail wheel (dfric=0.3 sfric =0.40). So there's virtually no
On Fri, 19 Jan 2007, Curtis Olson wrote:
I believe the captcha is randomly generated each time. I'm pretty sure the
problem is real people who take the time to sign on, answer the captcha,
reply to the confirmation email, and then go to town with their spam.
Beware. Captchas can be breached
On Thu, 18 Jan 2007, Stuart Buchanan wrote:
However, as it is converted from the Latex source, it isn't as easy to
read as a pure HTML document. There is certainly room for improvement in
that area.
If you mean that the LaTeX source isn't easy to read (not to mention edit)
for people
On Thu, 18 Jan 2007, gh.robin wrote:
The problem with pdf on screen is that the page layout is FIXED like it is
on paper. That is why it prints more consistantly , that page layout is
cast in stone. If you have a smaller screen or need larger text you have
to scroll _horizontally_ to read the
On Tue, 16 Jan 2007, tangyong wrote:
Hi,everybody. My project need to drive many aircraft to fly autonomouslly
using ATC radar data.My radar data contains many aircrafts' flight data.I
set up a FlightGear server(fgms) in my local network and what I need to
do is just inputing my radar
The enclosed patch is for printing out the inertia matrix from the yasim
command line utility (yasim-test.cpp).Index: source/src/FDM/YASim/RigidBody.cpp
===
RCS file: /var/cvs/FlightGear-0.9/source/src/FDM/YASim/RigidBody.cpp,v
On Fri, 5 Jan 2007, Joacim Persson wrote:
The enclosed patch is for printing out the inertia matrix from the yasim
command line utility (yasim-test.cpp).
...except that I used the wrong conversion constant for m² - ft². :P
(forgot to square it too)
New replacement patch enclosed.Index
I screwed up again, didn't I?
How *do* I convert metres per square feet to pounds per square feet
really?
Perhaps someone who is used to those weird bushel/pounds/gills units could
be kind enough to do a sanity-check and set it right if it's wrong. ;)
On Fri, 5 Jan 2007, Roy Vegard Ovesen wrote:
On Friday 05 January 2007 18:25, Joacim Persson wrote:
I screwed up again, didn't I?
How *do* I convert metres per square feet to pounds per square feet
really?
m/ft² - lb/ft² ?
That does not make sense, or do you still mean m² - ft²?
Er
On Fri, 5 Jan 2007, Roy Vegard Ovesen wrote:
I'm pretty sure what you had in your patch and what I wrote in my last post is
correct.
Yup, apart from my confused comments in yasim-test.cpp
I hereby declare the enclosed patch as the last and final version. ;)Index:
On Wed, 3 Jan 2007, John Denker wrote:
*) I spelled out deg. I tried putting the ° symbol in the
xml file, but it complained of a parse error. Using deg;
didn't work, either. Any suggestions on how to encode symbols?
Not directly an answer to you question but here's a tip that may be
On Wed, 3 Jan 2007, Ralf Gerlich wrote:
Disabling joystick inputs alltogether should not be an option, except -
perhaps - if you only disable a single axis. Assume that your AP is in
ALT hold mode and you want to do turns.
You are right about that of course. And using a separate channel is
Thought I'd share this find -- discovered it just now:
http://ntrs.nasa.gov/
Document-ID: 19770018207
Title: US Army helicopter design datcom. Volume 1 Airfoils
Author: Leo Dadone
Abstract:
This report contains airfoil data of interest for rotor
applications. The data is presented
On Wed, 3 Jan 2007, Heiko Schulz wrote:
Hi,
Real nice. But from 1976 - newer one would be good
too!
If there is a volume 2 somewhere...
Leo Dadone is a Boeing guy btw, so I suspect the 40-some listed airfoils
should at least cover the Boeing rotorcrafts up to 1977. Many of the
airfoils
On Fri, 22 Dec 2006, Curtis Olson wrote:
I experienced a small technical glitch in the 787 on climbout from KSFO ...
picture at the following link:
http://baron.flightgear.org/~curt/tmp/problem.jpg
=8-o
...terrorists placed a bomb onboard perhaps?
On Tue, 19 Dec 2006, Maik Justus wrote:
Important info for the ch47d flight model. I had expected a large delta3
effect.
Forgot to mention that the chinooks do however have lead-lag hinges which
may have a blade pitch coupling to it, I don't know (yet). We don't have
lead-lag hinges in the
Wim,
The ch47 in cvs is only a concept demonstrator of a tandem helicopter.
Hardly any numbers there represent a real Chinook. I'm fiddling with
another configuration.
On Wed, 20 Dec 2006, wim van hoydonck wrote:
blade mass - 111.6 [kg]
This is different from the blade mass I am using: 357
On Tue, 19 Dec 2006, Maik Justus wrote:
Important info for the ch47d flight model. I had expected a large delta3
effect. Can you point me to the point in the report, where you found
this info?
From the British ministry of defence:
On Tue, 19 Dec 2006, Maik Justus wrote:
One important point for the simulation: most rotors have a delta3 effect
(this means: reducing the pitch with increased flapping angle). Do you
know this parameter for the ch53e (or for other helicopter?)
I can only add that the CH-47D has no delta3
On Fri, 15 Dec 2006, leee wrote:
Well, I've tried removing references to AI aircraft, including removing
references to it from preferences.xml, ensuring that the VBlank nVidia
settings are checked and also re-compiling my kernel without pre-emption but
none of it seemed to make any difference
On Fri, 15 Dec 2006, leee wrote:
Hmm... hadn't thought about trying different video drivers... that wouldn't
explain why some other aircraft don't display this problem though, or do you
get it with all aircraft?
I fixed the problem here this evening the $$ way. Bought myself a new
(but
On Fri, 15 Dec 2006, leee wrote:
Could a few other people give the SU-37 a bit of a run and see if they notice
any SU-37 specific problems?
I've been buzzing the KSFO tower and downtown SF now back and forth at mach
1.5 for 15 minutes or so, until I had a little accident at too low altitude
--
On Fri, 8 Dec 2006, Stuart Buchanan wrote:
- There is no trimming for different flight phases. Vertical speed is
purely controlled by power.
Many trikes has a trim function, just like all non-trainer hang glider has
nowadays. (I know the Airborne trike we use for aerotowing has it.) This
trim
On Thu, 9 Nov 2006, Jon S. Berndt wrote:
The engine stuff can't (at least for now) be removed from JSBSim, in theory
or in principle. JSBSim is a drop-in dynamic library for flight dynamics,
which includes all normally available subsystems that provide forces and/or
moments on the aircraft.
On Wed, 8 Nov 2006, Yurik V. Nikiforoff wrote:
There is one problem around it. Power of starter not enough for spin engine
shaft with big propeller - as I understand, this is JSBsim limitation. I read
about it in devel list, but fix not ready yet. Cause this limitation,
inertial starter may
On Wed, 8 Nov 2006, Yurik V. Nikiforoff wrote:
Yes, It works, but I can't set diameter of propeller by data sheat from flight
manual. Engine can't start, if I set propeller greater then 110'. But real
AV-2 propeller have 136' diameter.
Found this kludge in JSBsim:
FGPiston::doEngineStartup()
On Wed, 8 Nov 2006, Chris Metzler wrote:
Heh. Was getting my speed from the property browser.
I was a bit worried that you were stalling it around. =)
Well, 70 knots is about 130 km/h, so I guess that's right. It seems
*so* slow though; I was in constant fear of stalling if I did anything
On Wed, 8 Nov 2006, Berndt, Jon S wrote:
Regarding low RPM engines: I'm not sure, but I think this has been
addressed in the version of JSBSim that is in JSBSim CVS.
Nope, it isn't. :P
There is a similar hard-coded value in FGPropeller.cpp,
FGPropeller::GetPowerRequired()
Line 240, regarding
me wrote:
There is something funny with the propeller pitch control.
The cause of that is the lines defining minrpm and maxrpm in the propeller
definition file for An-2. Only fixed-speed propellers should have a minrpm
and maxrpm setting. See the test for fixed pitch/fixed speed/variable pitch
On Wed, 8 Nov 2006, Jon S. Berndt wrote:
Actually, yes, it is. Dave Culp submitted a change to *JSBSim* CVS on
October 16 that had this change in it, among others:
StarterHP = sqrt(MaxHP) * 0.2;
Yes I saw that on the CVS, but the engine idle rpm parameters are also
still hard-coded.
I've got the following messages (from within plib) recently:
fgfs: ssgBase.cxx:78: virtual ssgBase::~ssgBase(): Assertion `refc == 0' failed.
Spurious bug; hard to trigger at will. You have to swing a fresh dead mouse
from the mousetrap under the sink over your head whilst chanting Oh Bug of
On Tue, 8 Aug 2006, Lee Elliott wrote:
Thanks for posting this observation - this is clearly a bit wacky
(not that accelerating w/o +energy wasn't) - can you reproduce
it?
Now that I tested it again, I saw however that the FF number didn't fall
over from a high number to a negative, but
On Tue, 8 Aug 2006, Lee Elliott wrote:
I think there's now a patch in for the engine problem - don't
know if it fixes everything though.
Well it changed the behaviour somewhat. No more negative FF et al values.
It still accelerates like mad in extreme turns but now we get a SIGSEGV
clue. I got
On Fri, 4 Aug 2006, Curtis L. Olson wrote:
Based on my understanding of YASim, this has to be some sort of bug in
the core yasim code since it's getting energy from nowhere. Might be
some sort of numerical/roundoff issue, perhaps some of the code in YAsim
makes assumptions/simplifications
Maybe I missed it, but I didn't get any hits (except from a few messages on
fg-user's list) on a site search on the FG homepage for kelpie, fgfp
nor fgflightplaner, here's the link:
https://sourceforge.net/projects/fgflightplanner/
This is IMHO a pretty impressive app for IFR flight planning
On Mon, 17 Jul 2006, Melchior FRANZ wrote:
Seems that there are two bugs that make the bo105 ASI show
positive speeds when flying backwards:
1. YASim delivers a positive /velocities/airspeed-kt on backward
flight.
The second is easy to fix, but I have no idea about the first.
On Mon, 17 Jul 2006, Melchior FRANZ wrote:
/orientation/side-slip-*
So, as you didn't bother to write a whole sentence and leave the
interpretation to the reader, which I find quite annoying, is it
the following what you are trying to say: YASim is right, (airspeed-kt)
is *not* meant to be
On Mon, 3 Jul 2006, Maik Justus wrote:
All effects I have only tested with the bo. But I will check everything
with the ch47 after finishing the coding. Please send me your ch47
config (or is it in cvs?). Probably there are some wrong signs for
clockwise rotating rotors. But the sign of the
On Tue, 4 Jul 2006, Josh Babcock wrote:
This helo def does not seem to be producing any main rotor torque.
Adjust the poweratpitch_0 parameter. (on tail rotor too)
Those seven 11m long blades probably cost a bit more than 53kW to turn at
185 rpms even at zero pitch. =)
But where do one find
On Sun, 2 Jul 2006, Maik Justus wrote:
src/FDM/YASim/airplane.cpp in function void Airplane::solveHelicopter()
from
applyDragFactor(Math::pow(15.7/1000, 1/SOLVE_TWEAK));
applyLiftRatio(Math::pow(104, 1/SOLVE_TWEAK));
to
applyDragFactor(Math::pow(1, 1/SOLVE_TWEAK));
On Mon, 3 Jul 2006, Maik Justus wrote:
We could on the other hand let the model designer set and tweak the
fuselage Cd manually in the config file.
That would be the easier way. Maybe it make sense to look, which results
the solver get for different airplanes.
...faking a wing from rotor
On Mon, 3 Jul 2006, Maik Justus wrote:
If you put the stick forward or backward there should be a yaw effect.
With the bugfix you have to cancel the torque generated by fuselage and
airspeed by putting the stick backward. This could be the cause for the
yaw. (Or dou you get the yaw moment
On Mon, 3 Jul 2006, Josh Babcock wrote:
Joacim Persson wrote:
Or translate the rotor equations to jsbsim -- ?
It always seemed odd that YASim should be the one to have rotary
support. The whole solver idea just doesn't seem to fit at all. Lookup
tables however work great for helos, you
On Sun, 2 Jul 2006, Maik Justus wrote:
the helicopter simulation as it is in cvs has the bug, that any kind of
surfaces, stabs, fuselages have no aerodynamical effect.
That bugfix had a huge impact on the chinook. I still get a negative yaw
moment from the both rotors (most of the time), but I
On Wed, 28 Jun 2006, chris wrote:
That is backward.
Indeed so. ;) (already sorted out)
The chinook used to have just an Stability Augmentation System the SAS for
short. You still did not want to take your hands off the cyclic but it made
it somewhat smoother.
Yea I read a little about
On Tue, 27 Jun 2006, Josh Babcock wrote:
But you don't *want* the rotor to be straight. Assuming a constant
airfoil section along the length of the blade, you would want a constant
aoa so that you can get the maximum lift out of the blade.
I'm glad you didn't read what I had typed, because I
On Mon, 26 Jun 2006, emanoel bernardo wrote:
Hey everyone,
I'd like to use FG (Flight Gear) and autopilot separetelly but i don't know
how do they communicate to each other. Let me explain better...What I wanna
do is:
Run FG on a PC and run the autopilot on another PC and communicate them.
On Tue, 27 Jun 2006, Maik Justus wrote:
I'm working now on simulating the rotor on several points along the
rotor blades (with twist).
I suspect that twist to vary with load. It's the tips that has a 12° higher
incidence (sic!) than the root, when the rotor is stopped that is. I guess
that's
On Fri, 23 Jun 2006, Maik Justus wrote:
Is there any other helicopter (3D-model) in preparation?
Hello Maik,
I was fiddling with mainly the FDM for the Chinook last winter, and have a
simple 3D for it. (only an untextured exterior fuselage with two non-rotating
rotors
and the four wheels)
On Sat, 24 Jun 2006, Maik Justus wrote:
Hi Joacim,
I am surprised how many helicopter types are (more or less) in process.
The ch47 simulation is only a proof of concept. It shows, that the rotor
simulation is able to simulate this rotor configuration (It has 4-blade
rotors, it is much to
From talking to others on IRC I understand the cvs version of simgear builds
fine with gcc 4, but with gcc 3.3.6 I get these compile errors added below. Is
there a simple workaround for this?
In file included from mat.cxx:44:
../../../simgear/structure/SGSharedPtr.hxx: In member function `void
On Sat, 17 Jun 2006, Mathias Fröhlich wrote:
Given the error message, I could imagine a that the attached patch helps.
Can you please tell me if that patch helps?
Compiled without a warning on mat.cxx now.
(Was that all? Couldn't handle that method as inline?)
... I tested with gcc-4.1.1
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