Re: [Flightgear-devel] OT, real life: my first turboprop
On Thu, Oct 23, 2008 at 5:25 AM, Torsten Dreyer <[EMAIL PROTECTED]> wrote: > Hi all > > I just had the oppertunity to be as copilot in a C425 Conquest I on a trip > from Hamburg, EDDH to Graz, LOWG. This was my first trip in an aircraft of > that size and being propelled by a turboprop. Following the tradition of > "my > first..." real life experience reports, here is my story. > > The day started like a typical end-october day in Hamburg, a temperature of > 8 > deg C, gusty westerly winds and moderate rain. After the preflight > walkaround, the pic and I were soaked and we were happy to enter the > Conquest. Shortly after drying and preparing ourself and copying the ATIS, > we > received our startup and enroute clearance: "Startup approved, you are > cleared to Graz via AMLUH 5G departure, flight planned route, squak 7665". > The smooth startup and running of a turbine powered prop is amazing, > compared > to the shaking and rumbling of a piston engine. > Moments later we had our taxi clearance to the active departure runway 33. > On > our way, we performed the items on the checklist and got our "cleared for > takeoff" when we reached our holding point 33 in taxiway K. The moment we > did > the line up, the rain increased and the far end of the illuminated runway > disappeared in the mist. > Never mind - we were fully ifr equipped and certified for flights into > known > icing. Setting takeoff power smoothly and quickly accerlerates the 3.5to > Cessna to 60, 80 and than 100kts: rotate and off we were! > We had the departure route punched into the GNS530 which was coupled to the > autopilot. After performing the after takeoff items and contacting the > departure controller we waited for the autopilot to do the first heading > change of roughly 30deg to the right when passing the 3DME reading from the > ALF DME, but nothing happened. We pretty soon recognized that neither the > heading nor the nav mode of the autopilot was working. Meanwhile we had > completely entered the shower, our Conquest was shaking and rocking, and > outside visibility went down to zero. I remembered, what I once learned > about "crew coordination" and we quickly devided the workload. The pic was > flying and I did all the radio, navigation and paperwork. Just a few but > interesting minutes later, we popped out of the clouds at roughly 15000ft > and > the sun greeted us with her bright smiling face. We continued up to FL230 > and > had a gentle flight for the rest of the trip. Clouds disappeared in > southern > germany, giving way for a fantastic view of the alps. > Although our destination was in sight, we decided not to cancel ifr or to > do a > visual approach since the ATIS had some few clouds at 200ft in the report. > The approach controller vectored us for a 7 miles final into runway 35 > where > we touched down a little more than two hours after our takeoff in Hamburg. > > Sorry for the long posting - if you made it so far, you might like some > pics: > http://www.t3r.de/flightpics/graz/ > > Greetings, Torsten > > - > This SF.Net email is sponsored by the Moblin Your Move Developer's > challenge > Build the coolest Linux based applications with Moblin SDK & win great > prizes > Grand prize is a trip for two to an Open Source event anywhere in the world > http://moblin-contest.org/redirect.php?banner_id=100&url=/ > ___ > Flightgear-devel mailing list > Flightgear-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/flightgear-devel > It sounds like an exciting trip, atleast immediately after take off. Congratulations. - This SF.Net email is sponsored by the Moblin Your Move Developer's challenge Build the coolest Linux based applications with Moblin SDK & win great prizes Grand prize is a trip for two to an Open Source event anywhere in the world http://moblin-contest.org/redirect.php?banner_id=100&url=/___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] GPS update rate
On Mon, Apr 14, 2008 at 2:01 PM, Mike Schuh <[EMAIL PROTECTED]> wrote: > On Mon, 14 Apr 2008, Melchior FRANZ wrote: > > >* Curtis Olson -- Monday 14 April 2008: > >> Let's say I want to do a simple moving average ... > > > > >FlightGear has an aircraft.angular_lowpass() in $FG_ROOT/Nasal/aircraft.nas. > >It filters sin() and cos() separately, and builds the angle from that again. > > This sounds close to what I was going to suggest - summing/averaging unit > vectors. The vectors could proportional to speed if desired. > > In general, unit vectors are a good way of dealing with circular > distributions (they work well for statistical analysis of time-of-day > studies, where 2359 and 0001 need to be two minutes apart, not 1338). > > -- > Mike Schuh - Seattle, Washington USA > http://www.farmdale.com > > > > - > This SF.net email is sponsored by the 2008 JavaOne(SM) Conference > Don't miss this year's exciting event. There's still time to save $100. > Use priority code J8TL2D2. > > http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone > ___ > Flightgear-devel mailing list > Flightgear-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/flightgear-devel > How about using a kalman filter with velocity as an input to extract a angular and angular rate signal from some noisy inclination data? I think the down side to it would be the lag, but I think it might work well in the pitch axis. Also; http://www.vboxusa.com/products.php#vb3r2g2 They have some pretty decent update rates. I've seen some demos on some really high end ones which can go at 50hz. Those boxes also come with accelerometers and they do some amount of interpolation during the time a gps signal is not present. to maintain the update rate. I thought they were pretty cool - This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Blackbird -SR71 A and B
On 7/13/07, Jon S Berndt <[EMAIL PROTECTED]> wrote: > On Fri, 13 Jul 2007 18:52:20 +0200 > "gh.robin" <[EMAIL PROTECTED]> wrote: > > On Fri 13 July 2007 18:32, AnMaster wrote: > >> gh.robin wrote: > >> > On Fri 13 July 2007 01:28, bass pumped wrote: > >> >> On 7/12/07, gh.robin <[EMAIL PROTECTED]> wrote: > >> > >> SNIP > >> > >> >> While you are it... maybe a M-21 and launchable D-21 might work > >>great > >> >> too! > >> >> > >> >> :p > >> >> > >> >> To be really cool would be to then do what the Air Force failed > >>to get > >> >> the D21 to do... run a recc mission and then splash down for > >>pickup! > >> >> > >> >> Cheers!! > >> > > >> > You are right > >> > it would a good idea, and why no a bell-X1 with the B-29, > >> > or the B52 and X15 (we have both into FG) > >> > that would be a challenge to have within MP both Aircrafts Mother > >>and > >> > Child flying first together , and then flying separately. > >> > >> I strongly suspect you would get the same problem as with areotow, > >>lag. > >> Areotow "solves" that by making the tow wire elastic. What would you > >>do for > >> some aircraft that is carried? Elastic sling? ;) > >> > >> AnMaster > >> > > I will better like a solution, for instance "external forces" > >features. > > I guess that JSBsim could in the future answer it. > > > > Regards > > > > -- > > Gérard > Videos of successful and an unsuccesful D-21 launch if you haven't already seen it. http://www.youtube.com/watch?v=FYsMli570K8&mode=related&search= - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Blackbird -SR71 A and B
On 7/12/07, gh.robin <[EMAIL PROTECTED]> wrote: Hello, Here is a new version of SR71-BlackBird. That package contains the two variants -SR71-A which was the common aircraft with pilot and RSO ===> --aircraft=Blackbird-A http://perso.orange.fr/GRTux/BlackBird-pic22.jpg -SR71-B which was the training aircraft with instructor pilot and student pilot. ===> --aircraft=Blackbird-B http://perso.orange.fr/GRTux/BlackBird-pic20.jpg http://perso.orange.fr/GRTux/BlackBird-pic21.jpg You will notice (i hope) an improvement about panels and cockpits. Read carefully the instructions to start the engines (i guess the space key change which is discussed here will not modify the process). Because of the large difference with the previous release (a lot of new files, and a lot of files which must be removed) i have only done the full package available. If necessary i can build the package with diff files. The instrument/altitude patch ( altitude to 10 ft) from John Denker has not been committed (for some reasons ?), so, the trick i had included in the previous Blackbird remain in place (only the VSI does not work above 61000). Remember the cruise altitude of Blackbird was 85000 ft (the model can do it) the full package is available here (5 mo) http://perso.orange.fr/GRTux/SR71-BlackBird.tar.gz Regads -- Gérard - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel The screenshots look great!! While you are it... maybe a M-21 and launchable D-21 might work great too! :p To be really cool would be to then do what the Air Force failed to get the D21 to do... run a recc mission and then splash down for pickup! Cheers!! - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] flight control polarity
On 7/3/07, Gordan Sikic <[EMAIL PROTECTED]> wrote: John Denker wrote: Hi John, > In every aeronautical engineering publication I've seen, the > convention for "positive" has been: > -- Positive aileron deflection creates a positive rolling moment, >positive around the +X axis, i.e. roll to the right; > -- Positive rudder deflection creates a positive yawing moment, >positive around the +Z axis, i.e. yaw to the right; and > -- Positive elevator deflection creates a positive pitching moment, >positive around the +Y axis, i.e. nose up. > Could you pls share the names of publications you use to backup your statements? In every aeronautical engineering publication I've seen, convention was exactly opposite of "your" definition. For example, in the book "Aircraft control and simulation", by Brian Stevens and Frank Lewis, on page 128, there is a table (TABLE 3.3.1), where is clearly stated that positive movements of all primary control surfaces produce negative moments. best regards, Gordan - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/ ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel As a note, I vaguely remember my professor saying something about there being an American sign convention and an English sign convention... or something like that... and that they differ when it comes to the aileron deflection and rolling moment... and that Roskam uses the English system... Anyway my memory is hazy and quick google resolved nothing. Can anyone else elaborate? Thanks. - This SF.net email is sponsored by DB2 Express Download DB2 Express C - the FREE version of DB2 express and take control of your XML. No limits. Just data. Click to get it now. http://sourceforge.net/powerbar/db2/___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Phidot not zero.. And bank angle constant...
On 3/23/07, Jon S. Berndt <[EMAIL PROTECTED]> wrote:
> > > My question:
> > > If I put the aircraft (Cub or 172) into a constant bank and
> > > pitch angle turn ("trimmed"), I expect phidot and thetadot to
> > > be near zero, and psidot non-zero... Yet, I see thetadot near
> > > zero, and phidot and psidot non-zero (as a matter of fact:
> > > phidot is almost as "large" as psidot). Surely this can't be
> > > right? According to the FlightGear (and MathsWorks / Matlab)
> > > documentation, this is not p,q,r but Euler/Gimbal angular
> > > rates in rads/sec... not body rates...
> >
> > Sorry, but I don't have ANY time to respond to this, but keep in mind that
> > you are looking at BODY-AXIS rates and accelerations. If you are
> > in a turn,
> > the pitch and roll are going to show values.
> >
> > Bill
>
> p,q,r are body rates. In a *steady* turn, I would expect body rates (p,q,r)
> to be zero. Phi, theta, psi (Eluer angles) are measured with respect to the
> local frame. In a steady turn, the euler *rates* would be non-zero.
>
Hi,
I'm sorry but its sounding a little anomalous to me.
>From the kinematic relationships;
p = phidot - psidot sin(theta)
q = thetadot cos(phi) + psidot cos(theta) sin(phi)
r = psidot cos(theta) cos(phi) - thetadot sin(phi)
now for a steady turn, theta can be approximated close to zero and for
the thetadot is also close to zero and negligible. So we are left
with roughly;
p = phidot
q = psidot sin(phi)
r = psidot cos(phi)
If we p q and r were to be measured in the body axis, I guess they
would be zero. But in the inertial frame;
p = phidot = 0 since its in a level turn the bank angle would be constant
q = psidot sin(phi) = non zero since phi has a value and in the
inertial frame the heading is changing
r = psidot cos(phi) = non zero again
Therefore q and r should have values and so should psidot, but
thetadot and phidot should be zero or close to zero.
Am I missing something? Please do let me know.
-
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Re: [Flightgear-devel] announcing star trek runabout shuttle and questions
I think the models look great!! - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] [Fwd: flightgear site]
seems fine now. I guess it recovered. On 11/2/06, Darko Tasovac <[EMAIL PROTECTED]> wrote: > Sorry, > > This link works > > http://tdarko.googlepages.com/Screenshot.png > > > Darko Tasovac wrote: > > It seems the flightgear site was under attack. I noticed that a few > > minutes ago. Website was normal 30min ago...I hope they didnt delete all > > content. > > > > http://drug-pionir.ueuo.com/Screenshot.png > > > > > > - > > Using Tomcat but need to do more? Need to support web services, security? > > Get stuff done quickly with pre-integrated technology to make your job > > easier > > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo > > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > > ___ > > Flightgear-devel mailing list > > Flightgear-devel@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/flightgear-devel > > > > > > > > > - > Using Tomcat but need to do more? Need to support web services, security? > Get stuff done quickly with pre-integrated technology to make your job easier > Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo > http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 > ___ > Flightgear-devel mailing list > Flightgear-devel@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/flightgear-devel > - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
[Flightgear-devel] F-14
I guess this would be an interesting resource for anyone trying to develop an F-14 model. Just thought I'd share it!! http://www.topedge.com/panels/aircraft/sites/mats/f14-detail-dimensions.htm - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Star Wars Mod :-)
On 10/27/06, Roberto Inzerillo <[EMAIL PROTECTED]> wrote: > http://www.geocities.com/robitabu/fgfs_SW/SW_01.jpg > http://www.geocities.com/robitabu/fgfs_SW/SW_02.jpg > I can't see!! I want to see!! Its not working :-( - Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] first time
On 10/9/06, Krishna Prasad <[EMAIL PROTECTED]> wrote: > > hi all > I am a student and I plan to develop a simulation for an unmanned aerial > vehicle using flight gear. Can you please tell me as to how exactly i should > start. I am confused on using the filght gear. I did download all the stuff. > Now how am i supposed to start. Where do i change the plane parameters and > what do i need to change. Where do i how exactly am i supposed to work on > this. > Thanks > Krishna > What parameters are you looking to change? Have you looked at any of the documentation? - Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys -- and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] UAV Heli and Matlab
> Question #4: Has anybody tried the Matlab-FlightGear connection without > perishing on the try? If so, is there any documentation? > I don't know if there is any documentation. I kind of remember that Jon had asked someone to come up with a paper or something... but there is ofcourse the protocol documentation you can find with flightgear to find out what the udp packets look like. There also is a small toolbox you can download from the mathworks website which will help in sending and reading udp data in simulink. You can find that here http://www.mathworks.com/matlabcentral/fileexchange/loadFile.do?objectId=345 best of luck!! ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] Weird network problem
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Re: [Flightgear-devel] 3d instruments
On 2/19/06, Torsten Dreyer <[EMAIL PROTECTED]> wrote: > > Hi Torsten you dont have to create 2 separate 3d RPM gauges. > > The xml file loads the .ac model , so create two separate RPM xml files, > > one file driven by engine 1 , the other by engine 2 , but both files > > using the same 3d model > Yep - that's what I will do. > I hope I will never model the Do-X - Amphibian with 10 engines ;-) was it 10 or 12 engines??? --- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnk&kid3432&bid#0486&dat1642 ___ Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/flightgear-devel
Re: [Flightgear-devel] dual head linux FG
and windows if possible!!On 2/10/06, Justin Smithies <[EMAIL PROTECTED]> wrote: Hi Guys, Anyone know howto get flightgear to run full screen across 2monitors in Linux.I'm using a dual nvidia 5200 and i have setup twin view.If i run FG in a window i can get it to fill the 2 screens but i want to use full screen and if i do that it only goes on the 1st screen.Any ideas ?Regards,Justin Smithies---This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makessearching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=103432&bid=230486&dat=121642___Flightgear-devel mailing list Flightgear-devel@lists.sourceforge.nethttps://lists.sourceforge.net/lists/listinfo/flightgear-devel
