Seen this?
http://researchernews.larc.nasa.gov/archives/2002/121302/Parachute.html#
Jon
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On 2/6/04 at 1:33 AM Jonathan Richards wrote:
>12.5cm resolution at a price of 70.60 GBP per sq km. I'm drooling and
>sighing
>at the same time. Messy.
>
If you want to play with photography of that sort or resolution, parts of
Maine are available for download in colour at about 15cm (actuall
On Thursday 05 Feb 2004 9:06 am, Erik Hofman wrote:
> Luca Masera wrote:
> > Hi everyone,
> >
> > I'm using FlightGear and I've seen the realistic scenery that could be
> > used.
> The scenery you have seen was probably derived from a commercially
> available satellite image CD-ROM set of the UK.
On 2/5/04 at 7:10 PM David Megginson wrote:
>Curtis L. Olson wrote:
>
>> I see the same thing in the JSBSim c172, except that it spins down
>> rather quickly and stops.
>
>I've never shut down an engine in flight in real life, but from reports
>I've
>heard, you have to bring a 172 almost to th
Curtis L. Olson wrote:
I see the same thing in the JSBSim c172, except that it spins down
rather quickly and stops.
I've never shut down an engine in flight in real life, but from reports I've
heard, you have to bring a 172 almost to the stall to stop the propeller
from windmilling; once stoppe
David Megginson wrote:
Andy Ross wrote:
Windmill (i.e. zero torque) speed is 450 RPM.
Windmill drag at that speed is 47N, about 10.5 pounds of force, or
about 5 equivalent horsepower at that airspeed.
When you shut down the engine in YASim, the propeller does not windmill
-- it just slowly spi
Andy Ross wrote:
Windmill (i.e. zero torque) speed is 450 RPM.
Windmill drag at that speed is 47N, about 10.5 pounds of force, or
about 5 equivalent horsepower at that airspeed.
When you shut down the engine in YASim, the propeller does not windmill --
it just slowly spins down and stops.
All t
Duncan McCreanor <[EMAIL PROTECTED]> wrote:
> Adam Boggs wrote:
> > Date: Wed, 04 Feb 2004 16:42:26 -0700
> > From: Adam Boggs <[EMAIL PROTECTED]>
> > Subject: [Flightgear-devel] multiplayer status and idea (Long)
> > To: [EMAIL PROTECTED]
> > Message-ID: <[EMAIL PROTECTED]>
>
> >
> > So my thou
Matthew Law wrote:
I've already discussed starting IMC training almost immediately
after I get the PPL :-)
Your situation is different, of course, but in Canada or the U.S. I'd
suggest getting some real cross-country experience (with flight following,
if available) before getting too serious abo
Norman Vine wrote:
Someone interested in "Eye Candy" might be able to use this technique
http://www.dgp.toronto.edu/people/stam/reality/Research/pdf/R046.pdf
Creating these texture would not be much of a problem to me (I've done
something quite similar for adjacent cloud textures of a different ki
It would be cool if that's possible, because there are probably more people
like me, who'd like to keep XFree86 and still be able to compile FlightGear/
SimGear.
Thanks,
Durk
On Thursday 05 February 2004 09:33, Richard Bytheway wrote:
> I have managed to get SimGear and FlightGear to compile on
David Megginson wrote:
> I tried to fix this problem in JSBSim a year or two ago, and I seem to
> recall that no one on the flight model list could quite figure out how
> to code it back then. I also took a stab at YSBSim, and failed just
> as miserably. Neither model is set up to have the propel
David Culp wrote:
When I zero out my integral and derivative terms, it seems that the
proportional term is doing nothing.
This can happen because of the anti-integrator wind up logic. If the
magnitude of the proportional output is outside of the min/max range, it
get's set to zero. In these ca
> Hi everyone,
>
> I'm using FlightGear and I've seen the realistic scenery that could be used. Due to
> the fact that I'm using it as a base for my thesis and the realistic scenery is good
> new, I'm asking how I can create one for my country, Italy. The main question is how
> I can add textu
When I zero out my integral and derivative terms, it seems that the
proportional term is doing nothing. Looking through the code I see that the
variable "proportional" is initialised to false, and I can't see where it's
set to true. (same for the variable "integral").
Dave
--
*
David Culp wrote:
In xmlauto.cxx, from line 456:
// Calculates proportional error:
ep_n = beta * r_n - y_n;
if ( debug ) cout << " ep_n = " << ep_n;
if ( debug ) cout << " ep_n_1 = " << ep_n_1;
// Calculates error:
e_n = r_n - y_n;
if ( deb
In xmlauto.cxx, from line 456:
// Calculates proportional error:
ep_n = beta * r_n - y_n;
if ( debug ) cout << " ep_n = " << ep_n;
if ( debug ) cout << " ep_n_1 = " << ep_n_1;
// Calculates error:
e_n = r_n - y_n;
if ( debug ) cout << " e_
Someone interested in "Eye Candy" might be able to use this technique
http://www.dgp.toronto.edu/people/stam/reality/Research/pdf/R046.pdf
to make much nicer Water and Cloud textures for FGFS
Cheers
Norman
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> David Luff wrote:
>
> > I guess someone who knows JSBSim well needs to look at why the
> config file
> > value isn't getting picked up anyone.
>
> Done.
>
> Erik
Thanks, Erik!
Jon
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David Megginson writes:
>
> Roy Vegard Ovesen wrote:
>
> > No, not more respinsive than possible, but I thought that the damping in
> > FlightGear _and_ in real world was only for display purposes. So maybe
> > there would be a possiblility to get the signal before it was damped.
> > After rea
No, that's not the one, I don't think. The one I had (an original copy) had
both longitudinal and lateral characteristics. It's probably in a box here
somewhere. It was on top of the bread machine in the kitchen a few months
ago. I'd ask my wife where it is now ('cause I think she'd know) but I can
David Luff wrote:
I guess someone who knows JSBSim well needs to look at why the config file
value isn't getting picked up anyone.
Done.
Erik
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I was sitting my RT Practical. It's a basic test of skill on the radio and ability to
request and act on clearances along a preset route etc. Hence the near failure for
not requesting SVFR into a zone at or before 15miles/5 min.
All the best,
Matt.
On 16:36 Wed 04 Feb , David Megginson wrote
David Luff wrote:
I guess someone who knows JSBSim well needs to look at why the config file
value isn't getting picked up anyone.
I guess it would be a good idea to initialize the various variable
*before* the get initialized by the configuration file ...
Erik
_
No not yet. I have about 25hrs and need to sit the written exams for Flight Planning,
Nav, Met, Human Factors and Aircraft Technical. I have sat and passed RT written and
Practical and Air Law so far... Hopefully I'll get my PPL sometime later this year but
I'm in no rush really. Also, like C
On Thu, 5 Feb 2004, Duncan McCreanor wrote:
> Some things that I think should be taken into consideration when creating a
> multiplayer server based on the current code are:
>
> - the multiplayer code limited the number of players to ten. This was done
> because the frame rate drops as the numb
On 2/5/04 at 2:36 AM David Luff wrote:
>On 2/4/04 at 8:24 PM Curtis L. Olson wrote:
>>
>>Also, speaking of FDM's. The current JSBSim C172 in cvs seems to have an
>>engine that can break 3000 rpm in level cruise (150-160kts). That's
>>clearly way too high for C172. I'm guessing from the engi
Jon Berndt wrote:
Good point. That's something that's also not too hard to fix.
I tried to fix this problem in JSBSim a year or two ago, and I seem to
recall that no one on the flight model list could quite figure out how to
code it back then. I also took a stab at YSBSim, and failed just as
m
Jon Berndt wrote:
The thrust from the good engine is only half the asymmetry -- the
other half is the drag from the windmilling engine (until the pilot
feathers the propeller).
Good point. That's something that's also not too hard to fix.
I could not (yet) find my NACA report on the light twin,
Jon Berndt wrote:
How do we not work well in this case? Do you notice a specific inadequacy?
Yes -- neither JSBSim nor YASim does a good job generating drag for a
windmilling prop.
All the best,
David
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> The thrust from the good engine is only half the asymmetry -- the
> other half is the drag from the windmilling engine (until the pilot
> feathers the propeller).
Good point. That's something that's also not too hard to fix.
I could not (yet) find my NACA report on the light twin, but here are
Adam Boggs wrote:
> Date: Wed, 04 Feb 2004 16:42:26 -0700
> From: Adam Boggs <[EMAIL PROTECTED]>
> Subject: [Flightgear-devel] multiplayer status and idea (Long)
> To: [EMAIL PROTECTED]
> Message-ID: <[EMAIL PROTECTED]>
>
> So my thought was since that code is mostly there and does practically
> a
Roy Vegard Ovesen wrote:
No, not more respinsive than possible, but I thought that the damping in
FlightGear _and_ in real world was only for display purposes. So maybe
there would be a possiblility to get the signal before it was damped.
After reading the article on the AVWeb site and noting t
Andy Ross wrote:
That's no doubt true, but hopefully it's more a lack of tuning than it
is a fundamental flaw. For the specific case of YASim: the asymmetric
thrust effects should be more or less correct as-is, because it
applies the force at the location of the engine. The blue line speed
is al
There's also various scenarios of asymetric thrust - two running engines but one
running roughly or not developing as much power for a plethora of possible reasons.
These incidents have killed many pilots on take off as they think they have plenty of
power, and they do, but the situation easily
On Wed, 04 Feb 2004 17:18:33 -0800, Andy Ross <[EMAIL PROTECTED]> wrote:
Roy Vegard Ovesen wrote:
David Megginson wrote:
> Originally, the TC responded instantly -- I had to do a fair bit of
> work adding the slight lag to make it work like a real TC. The lag
> smooths out the indication a bit.
S
Jon Berndt wrote:
HOw do we get the console messages to scroll past (for debugging purposes)?
--log-level=info (or --log-level=bulk)
Erik
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On Wed, 04 Feb 2004 20:18:15 -0500, David Megginson
<[EMAIL PROTECTED]> wrote:
Roy Vegard Ovesen wrote:
So I shouldn't touch the responsiveness then?!. But rather add a new
property with better responsiveness.
Out of curiosity, why do you think that the responsiveness should be
better?
It impr
Well Done!
All the best,
Matt.
On 16:11 Wed 04 Feb , Ryan Larson wrote:
> I just got back from taking my Commercial Pilot, Airplane Multiengine
> Land checkride, and I am happy to say that I passed! Doing a single
> engine ILS down to minimums is lots of fun! I took the test in a Piper
> Az
Luca Masera wrote:
Hi everyone,
I'm using FlightGear and I've seen the realistic scenery that could be used. Due to the fact that I'm using it as a base for my thesis and the realistic scenery is good new, I'm asking how I can create one for my country, Italy. The main question is how I can add te
David Luff wrote:
This is potentially quite a can of worms. Currently, the 'smart AI'
aircraft that respond to ATC only exist within the remit of the AIMgr in
the ATC directory. This is separate from Dave Culp's scripted AI model
code, and any other FG static objects code. Additionally, they do
On Thu, 05 Feb 2004 00:05:00 +0100, Roy Vegard Ovesen
<[EMAIL PROTECTED]> wrote:
I'm thinking that adding a second indicated-turn-rate property that is
filtered with a higher bandwidth would be a good solution.
I just tried this, and the control system performance boost was quite
noticable. :
I have managed to get SimGear and FlightGear to compile on Cygwin with XFree86
installed. But I cannot remember how!
It may have been by running configure --with-x=no (or equivalent). I will check when I
get home.
Richard
> -Original Message-
> From: Roy Vegard Ovesen [mailto:[EMAIL PRO
Hi everyone,
I'm using FlightGear and I've seen the realistic scenery that could be used. Due to
the fact that I'm using it as a base for my thesis and the realistic scenery is good
new, I'm asking how I can create one for my country, Italy. The main question is how I
can add textures and objec
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