lly in Canada -- we have to leave a very big safety
factor.
All the best,
Daivd
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anded a fairly high degree of accuracy. It's also worth noting
that the FAA data is (indirectly, through suppliers like Jepp) the
basis for the GPS databases that GA and the airlines use.
It might be interesting to look at some examples where the FAA and
DAFIF data disagrees -- what are some o
hat we get from the DAFIF or FAA data should stand as-is,
for example. For Robin Peel's data, we should fix things only when
there is a known problem.
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://www.megginson.com/
___
Fligh
iscrepancy;
where we're just guessing, of course, we should do the
auto-correction.
All the best,
David
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should be seeing just over 4 inhg at idle and approaching 5 inhg at
> full throttle.
Excellent.
All the best,
David
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imGear, you may have to make the 2D panel into a
special kind of 3D extension that FlightGear plugs in somehow.
All the best,
David
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'd still have to wait for the
next plib release before switching our model format over.
All the best,
David
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ays.
All the best,
David
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David Culp writes:
> This is a step towards random failures too?
A failure manager is on my TODO list.
All the best,
David
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h
hat, hopefully.
With AC3D, you might find that the lack of a UV editor makes life
fairly difficult.
All the best,
David
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ise (then again, I still haven't
developed a taste for beer).
> I'm still working on the caravan in 3DS Max - another
> behemoth of an app but hopefully I will get it finished this year.
That would be a nice plane to add. We have one on the north field at
CYOW, and it's a big mon
k fixed a problem of
mine earlier today).
All the best,
David
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s behaviour, you can disable it by
setting the
/instrumentation/attitude-indicator/config/tumble-flag
property to false in your $HOME/.fgfsrc.
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://www.megginson.com/
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it (or perhaps climate change will catch up with us
first).
All the best,
David
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Jim Wilson writes:
> Can we bypass this by doing our own ac loader in simgear? I guess
> I need to understand better what the "optimization" gives us.
Essentially nothing.
All the best,
David
--
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Jim Wilson writes:
> Well, I guess I can live with that. Does this happen during
> loading the model data or further down the pipe?
It happens in the optimization steps just after loading.
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://www.meggins
, so the name of an object with
a single surface is lost. Unfortunately, Steve is not willing to
accept a patch to change this behaviour.
All the best,
David
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best,
David
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ter lesson 2...
Post as often as you'd like -- we'll all be interested in hearing as
it goes. If you're willing to make a 3D model of a 152 in Blender,
I'll be happy to cobble together a flight model for you.
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http:
> Now, will she hate me when I sell the car to pay for the
> lessons...?!
Make sure she gets at least 25-50% of the proceeds for something *she*
wants (and save a bit of a reserve for the transit passes).
All the best,
David
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the way they were already.
All the best,
David
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Jim Wilson writes:
> No, they were at 0, which is what makes sense.
Ah -- they must have been set to 2 in the individual aircraft config
files, then.
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://www.megginson.
Jim Wilson writes:
> The magnetos are now defaulted to position 2 (Left) instead of 0
> (Off). Was that intentional? Is there anything else in global
> preferences not mentioned in the log?
Is that not where they used to be? If not, we can put them back.
All the best,
David
Erik Hofman writes:
> Is there still no replacement function to do this kind of operation in a
> C++ string?
strstream would do the trick, but not all compilers support it yet.
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://www.meggins
terrain
astro
flight
input
gl
view
cockpit
general
math
event
aircraft
autopilot
io
clipper
network
You can also use one of the values "all" or "none".
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://www.megginson.com/
SGRawValueMethodsIndexed(this, index,
&FGControls::get_mixture,
&FGControls::set_mixture));
// and so on ...
}
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://www.megginson.com/
e is code that uses the property
/sim/log-level
with an integer value.
However, in fg_props.cxx, FlightGear also uses
/sim/logging/priority
/sim/logging/classes
with string values (I added those a long time ago). I'm not sure how
the two interact.
All the best,
David
--
D
en in use for
70 years or so. With a constant-speed prop, the governor will attempt
to maintain a constant RPM across a range of throttle settings by
constantly varying the propeller pitch.
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://w
macs and etags, I was able to replace zillions
of property names this morning, mainly in the base package. Try a new
checkout.
All the best,
David
p.s. cd $FG_ROOT
find . -name '*.xml' -print | xargs etags
--
David Meggins
riptive (it directly
controls propeller speed, not pitch).
All the best,
David
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gs grep /controls/aileron
find . -name '*.xml' -print | xargs grep /controls/mixture
and so on. I find 62 references to /controls/throttle alone.
I am willing to help.
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://www.megginson.com/
_
Jonathan Polley writes:
> I am waiting for the programming language for amateur radio operators,
> Morse. There is nothing like programming in dots and dashes!
.. -.. --- -. - --. . - .. -
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://www.meggins
(or something similar)?
3. Switches
---
Note that Curt's electrical system has a /controls/switches subtree,
while the recent rewrite has a /controls/lighting subtree. We need to
choose one or the other.
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http
will no doubt write a Punctuation
programming language, using only the characters [EMAIL PROTECTED]&*() (above 0-9
on the U.S. keyboard), as a pure act of spite to try to split the Perl
community.
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://www.megg
history.
Just be happy that Daley isn't mayor of New York or San Francisco, or
you might see the Chrysler Building or Alcatraz coming down next.
Note especially that this was done in the middle of the night with no
prior notice -- even the FAA didn't know until after the fact.
All th
.xml file with the effect of
> over-riding the previous values? There have been instances where I
> have wanted to do this, but I don't think it worked.
It's doable, but complicated. Let me know what you're thinking of.
All the best,
Dav
ext few years to,
maybe, 400 feet. Under those conditions, you'd be able to switch to
visual a couple of miles back from the field.
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://www.megginson.com/
___
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David Luff writes:
> OK, that's it!!! - ATC did *not* break TuxRacer ;-)
Are you sure?
All the best,
David
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property-scale
/controls/aileron
2.0
The "squared" element is still supported for legacy purposes.
Actually, to be most realistic, we'd add an ability to vary the value
of based on the calibrated airspeed -- the lower the airspeed,
the sloppier th
ain
subsystem manager (instead of updating manually), we can set it up to
update, say, every 2 seconds instead of every frame.
All the best,
David
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[
atters for modelling an
engine-out in a twin.
All the best,
David
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Major A writes:
> Yes, but wouldn't it be better to have at least a small amount of
> control around the centre?
You do. Unlike a dead zone, this approach has no location where
moving the joystick will not produce some kind of input.
All the best,
David
--
David Meggin
mply add a linear term here? That would make the control linear
> around the centre and transition into a square response at higher
> deflections.
I'm not sure that I understand the problem. As soon as you move the
control, it is no longer at zero and will get a gradually increasing
to
> sci.aeronautics. One works for 'a big AC company' and has copied
> several aerodynamics books from their library. Classics such as
> one by Whittle on turbines.
I think I might start reading sci.aeronautics. Thanks.
All the best,
David
--
David Megginson, [EMAIL
A double ADF indicator would make a fair bit of sense -- with
primitive equipment and no navigator, the pilot workload would be
fairly high, and two needles would help a lot for triangulating a
position (especially if the pilot would otherwise have to reach behind
the seat to change frequencies).
card turns, the single needle points to the station
> tuned in nav-radio #1 and the double needle points to the station
> tuned in nav-radio #2.
Are you thinking of an RMI?
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://www.megginson.com/
_
data from JAN ROSKAM!
Roskam might not be pleased either.
All the best,
David
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I know even went as far as
> changing locomotive shapes slightly to make rip-off models look really
> bad.
That's why I prefer public domain even to open source -- people spend
way too long worrying about that kind of thing.
All the best,
David
--
David Megginson,
first place.
All the best,
David
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ect in itself. It would be
useful for FlightGear, XPlane, and MSFS, and we'd end up with a much
bigger pool of contributors.
Hmm. Maybe I'll start on that.
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://www.megginson.com/
_
that value
> as a control input to the cruise configuration.
That's very helpful -- thanks. Note that the small planes I've flown
tend to use a bit of forward (nose-down) trim in cruise, not nose-up.
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://www.meggi
rating past Vne. Setting the elevator property solved the
problem. I don't know why it wasn't trimming for 0 elevator/elevator
trim.
All the best,
David
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David Megginson, [EMAIL PROTECTED], http://www.megginson.com/
___
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a slight nose-down bias for
cruise), and it now glides just fine with neutral elevator:
I recommend that other people designing YASim flight models try
something similar.
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://www.megg
bably not full runway width)
down at 10-20 ft AGL. If you aimed the light down 30 deg from the
horizontal, gave it a narrow width and maybe a 100 ft range, and made
it fairly dim, you wouldn't be too far off.
All the best,
David
--
D
a cessna!
Let us know how your first flight goes.
All the best,
David
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s do what I want. If having
> a unit with a SD card, or whatever, will make this easier, I can move to
> that.
Here are the scripts to get waypoints into and out of a Magellan
315/320:
http://www.inet.bg/~zezo/mag/
All the best,
David
--
David Meggin
oyal family during WW II
(Princess Margriet was born a few minutes' walk from my house) and for
helping to liberate the Netherlands at the end of the war. The result
of all this is that we're not all that inclined to make Dutch jokes.
All the bes
lications (please look over my resume,
> attached to this message.)
Welcome. Please feel free to spend some time looking over the code
you're interested in helping with, and to post any questions you have
to this list.
All the best,
David
--
David Megginson, [EMAIL PROTEC
Data
We're always interested in extending our current database of navaids,
fixes, airports, and ATC frequencies -- feel free to contribute
anything that's missing.
There's more as well, including scripting, but this should make a good
start.
All the best,
David
--
David
u can toggle on and off, because the airplane around you is part of
the scene graph instead of a flat picture stuck in front of it.
You can toggle the 3D model with the /sim/view/internal property
(false to disable the 3D model).
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http:
as outside North America, but then, until a few days ago I
hadn't known that the Canadian data were available.
All the best,
David
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surfaces.
All the best,
David
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Frederic Bouvier writes:
> from my understanding :
>
> 360 degres = 44000km
> 1 degre = 122.22km
> 1 minute = 2.037km
> 1 second = 0.033km
Let's keep it simple. 1 minute of latitude is one nautical mile --
that's its definition.
All the best,
David
that.
Note that that's not necessary using the vmap0 data, since the world
land mass is already split up into manageable chunks. The Great Lakes
and major North American rivers are also in the right place with
vmap0, but that's another discussion.
All the best,
David
--
David
ing a flight in the UK in summer as well, probably with a
> Tiger Moth. You can do this without any flying license.
Really? In Canada, you need a license even for an ultralight or a
glider.
All the best,
David
--
David Megginson, [EMAIL PROTECTED],
c data covers only the U.S., but the 3 arcsec data covers
all of North America, as far as I can see.
All the best,
David
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dn't hurt. :-)
In the meantime, there is 3 arcsec SRTM data for Canada and Mexico, so
we can join the club.
All the best,
David
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ghtsim/new-scenery.png
The higher-resolution SRTM helped, of course, but the scenery still
looked much flatter than this until I used Curt's arrayfit tool to
preprocess the elevation arrays generated from the SRTM.
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://ww
m and instrument failures. Deciding how
long to make the paths is always difficult because of the tradeoffs
between typing and browsing. For the typists, it's best to keep
the tree as flat as possible; for the browsers, it's best to keep the
tree nodes as uncluttered as possible. T
mponent
> of roll damping that would then be modeled by this piecewise
> approach. So, would we remove the Clp (roll damping) coefficient?
I think that most of the moment coefficients would be redundant when
you chose to model an aircraft his way.
All the best,
David
--
Tony Peden writes:
> How would we specify the characteristics of each of those surfaces?
Do you mean the position/orientation, the shape, or the aerodynamic
behaviour?
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://www.megginson.
(mostly forces) for the collection of surfaces.
All the best,
David
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s as you want.
All the best,
David
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ional coefficient-based engines are faking
it just as much as YASim is -- they just generally have more complete
data to start with.
All the best,
David
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___
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y
separate coefficients and relative orientations for each lifting
surface. Then, if the right wing were producing more lift than the
left, you would have a left roll; if the right wing were also
producing more drag, you would have a right yaw; and so on.
All the best,
David
--
David Meggins
false
property-cycle
/foo/bar
0
-1
You can have as many values as you want. If the current value of the
property does not appear in the list, the command causes it to
start over again. Make sure you don't include any duplicate values in
the cycle.
All the best,
vices Australia
>
> Does anybody object to including these into the code?
Now that Erik is the newest sucker^H^H^H^H^H^Hco-maintainer, feel free
to send him patches to him as well as Curt and me.
Curt prefers complete files and I prefer diffs -- what will Erik
choose?
All the best,
David
t a try is dirt
cheap (though the rest of the training won't be). At the Ottawa
Flying Club, you can get a 30-minute intro flight in a Cessna 150 for
CAD 49.00, which is about EUR 32.00. You cannot even get lunch for
that in London or New York.
All the best,
David
--
Da
m
Thanks -- that looks like a great resource.
All the best,
David
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Jim Wilson writes:
> Here's a shot of the p51d as is so far.
>
> http://www.spiderbark.com/fgfs/p51dshot7.png
>
> Just finished (most of) the exterior texturing.
Very nice.
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http
r for a
short day trip? I'd especially like to overfly Hastings, where my
wife and I spent six weeks of our honeymoon in a snug little flat in
1988. I'd also be grateful for pointers to Web sites with info on
rules and procedures for flying in the UK.
Thanks, and all the best,
D
Curtis L. Olson writes:
> I remember exactly 0% of the flight or the airport,
... because you were unconscious due to hypoxia? ...
> but my family flew into La Paz when I was 5.
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://www.meggins
I just found this:
http://www.me.psu.edu/me415/fall01/boeing2/
It's a little old -- apologies if the link has already been posted.
All the best,
David
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del.
All the best,
David
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tation at 130 kt
seems to do fine.
> I also tried an approach set-up, but the "--offset-distance" flag
> doesn't seem to work for SLLP -- any ideas why?
Try selecting the runway as well:
fgfs --altitude=14500 --vc=140 --offset-distance=2 --runway=27L --airport=SLLP
--aircra
irely within the intersecting area -- that's something
that tower would be more likely to allow.
All the best,
David
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in mph rather than kt. I
think that the actual stall speed is around 25 kt, which should show
up as a little under 30 mph.
All the best,
David
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[EM
t the
point of contact -- maybe a few cm/sec. For a short-field landing,
you plant it harder, but I'm not sure of the exact vertical velocity.
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://www.megginson.com/
___
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ter skill, but part is also
the fact that I now fly a plane with higher wing loading than the 172,
so it comes down faster when I need it to.
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://www.megginson.com/
___
but since the plane's not
certified for spins or snap-rolls (and I'm not trained in aerobatics
anyway), I'm not going to try.
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://www.megginson.com/
___
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a difference.
If anyone wants a real challenge, try landing the Cub across the
runway instead of along it. It should be easily doable with the
200-foot wide runway, but I haven't quite succeeded yet.
All the best,
David
--
David Megginson, [EMAIL PROTECTED], http://www.megginson.com/
___
the
plane climbs, you're still above the stall; if you raise the nose and
the plane descends, you're on the far side of the stall curve, and
raising the nose will help you descend faster (hopefully, you're only
a couple of feet up at this point).
All the best,
D
al or simulated, in well under 500 feet.
All the best,
David
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ve a
chance, then.
All the best,
David
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David Megginson, [EMAIL PROTECTED], http://www.megginson.com/
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and viewing position. We'll
have to keep tweaking.
All the best,
David
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his week.
Any suggestions on what the standard default repeat frequency should
be?
All the best,
David
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apply 100% brakes right away -- use rudder pedals, or bind an
axis on your input device.
All the best,
David
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wise it will, indeed, keep flying no
> matter what.
Exactly -- it seems to touch down at just a little over 100kt. What
is the typical approach speed for an F-16?
All the best,
David
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David Megginson, [EMAIL PROTECTED], http://www.megginson.com/
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nouously), *and* the fact that the
> leading and trailing edge flaps aren't implemented at this moment make
> it fly a bit itchy.
I was actually making a joke. I found the F-16 very easy to handle,
even without a flight computer.
All the best,
David
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Dav
knots too high and the flare lasts forever.
All the best,
David
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David Megginson, [EMAIL PROTECTED], http://www.megginson.com/
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