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  1. #31
    Join Date
    9th March 2018
    Location
    Sacramento, CA
    Posts
    182
    Well, the LCD-GPS Module in the LCD receiver gives you the distance and the arrow/heading to get to your rocket, that's basically what you'd get with an app.
    Thanks! I didn't see the compass direction and travel heading when I first read the LCD Rx page.

    TRA 18041 ... NAR 105061 ... AMA 641000 ... TCC, SARG, LUNAR
    Level 1: 14-Apr-18 3" Estes Nike Smoke, H115DM
    Level 2: 16-May-18 Madcow Formula 98, J425R

  2. #32
    Join Date
    18th October 2016
    Posts
    609
    Quote Originally Posted by cerving View Post
    Well, the LCD-GPS Module in the LCD receiver gives you the distance and the arrow/heading to get to your rocket, that's basically what you'd get with an app. And it doesn't require another device so it doesn't matter what's in your pocket. The problem with an app is that there are more pieces to maintain, and invariably if you have an app that talks to hardware there are going to be incompatibility issues at some point in the natural upgrade process. With everything in one box, all those issues go away.
    Cris is right. Before the Eggfinder Rx LCD had a GPS in it, I used the Rocket Tracker app on an Android tablet to watch where the rocket went. Plugging the coordinates into an iOS app worked well too (Rocket Finder, I think). With the GPS in the Eggfinder Rx LCD, I no longer use the other things. (It is cool to record a log of your flight using Rocket Tracker on Android though...except the Eggfinder can record your flights on an OpenLog.)

    That said, that works for me here in the Nevada desert. I don't need any navigation info other than a direction & distance. If you need maps so you can find roads to get around farmers' fields, you may have different requirements.

    TRA L2. I-class record: "Vanish 29" with an I224, 14,596ft, Mach 1.92. Video here.

  3. #33
    Join Date
    9th March 2018
    Location
    Sacramento, CA
    Posts
    182
    I'm sold on the concept and wrote Cris. Thank you.
    TRA 18041 ... NAR 105061 ... AMA 641000 ... TCC, SARG, LUNAR
    Level 1: 14-Apr-18 3" Estes Nike Smoke, H115DM
    Level 2: 16-May-18 Madcow Formula 98, J425R

  4. #34
    Join Date
    3rd February 2012
    Location
    So Cal (ROC, TRASD, SCRA)
    Posts
    2,672
    Quote Originally Posted by Rockethound View Post
    Thanks! I didn't see the compass direction and travel heading when I first read the LCD Rx page.
    You have to press the button, it flips you back and forth between the coordinate display screen and the headings/distance navigation screen.

    (On the subject of the button,yes, I realize that an external button has almost become a necessity. If I can find one that I like that's not pricey I'll stop including the little tactile button and include an external one instead. Haven't found one, yet...)

  5. #35
    Join Date
    9th March 2018
    Location
    Sacramento, CA
    Posts
    182
    Will remember that detail. Thanks for the prompt service with my order. It will be part of my L2 cert flight at LDRS.
    TRA 18041 ... NAR 105061 ... AMA 641000 ... TCC, SARG, LUNAR
    Level 1: 14-Apr-18 3" Estes Nike Smoke, H115DM
    Level 2: 16-May-18 Madcow Formula 98, J425R

  6. #36
    Join Date
    26th November 2009
    Posts
    5,246
    Quote Originally Posted by cerving View Post
    There's an app called Rocket Track out there too, I have not personally tried it, but some people I know that have like it better than GPSRL.



    Well, the LCD-GPS Module in the LCD receiver gives you the distance and the arrow/heading to get to your rocket, that's basically what you'd get with an app. And it doesn't require another device so it doesn't matter what's in your pocket. The problem with an app is that there are more pieces to maintain, and invariably if you have an app that talks to hardware there are going to be incompatibility issues at some point in the natural upgrade process. With everything in one box, all those issues go away.
    Rocket Track needs a live data link to get maps. GPSRL one can cache maps and use a WiFi only device.

    The Ham radio apps APRSIS/32, YAAC and Xastir can be modified to work with the NMEA, trackers and actually
    do better presentation on a map and collect the received data better. The data is much easier to get at.
    The problem is they are a P.I.T.A. to set up.

    If I want something totally easy to map track albeit requires a Ham ticket, Kenwood D72 or Yaesu VX8GR (GR only)
    with a single wire connection to a Garmin 60CS or 60CsX.. Can track all day in the sun and no diddling with settings or software. Use Beeline GPS 70cm or 2 meters, Tele-GPS or any APRS tracker. The Garmin screens can be read in direct sunlight very easily. If I just want to fly on a map "sight unseen" on a moments notice I go with a rocket that has an APRS tracker. Yes I know one can do fine with lat/long on a screen but I prefer an idea of what's going on in flight. Kurt
    Last edited by ksaves2; 27th April 2018 at 03:22 PM. Reason: added stuff.

  7. #37
    Join Date
    9th April 2011
    Location
    Mansfield, TX
    Posts
    2,738
    So I guess straight RDF is out of fashion these days.
    Jarrett Dorough

    Lover of 29mm motors and wood glue

  8. #38
    Join Date
    6th September 2009
    Posts
    1,796
    Quote Originally Posted by grouch View Post
    So I guess straight RDF is out of fashion these days.
    Yes it is. Last seen in 1974 to track a moose.

  9. #39
    Join Date
    23rd July 2011
    Location
    Butte, MT
    Posts
    2,729

    Trackers: T3 vs Featherweight vs ??

    Quote Originally Posted by grouch View Post
    So I guess straight RDF is out of fashion these days.
    Not for everyone. The most experienced people in my local club use RDF xmitters still for more rockets than GPS trackers. They use Kate for their largest rockets, but a Walston, though long in the tooth, can be added as an afterthought; it doesn’t need to be designed in.
    Steve Shannon
    L3CC, TAP, Director, Tripoli Rocketry Association

  10. #40
    Join Date
    9th April 2011
    Location
    Mansfield, TX
    Posts
    2,738
    I wouldn’t trade for mine. Not sure I’m fangled enough for the new style GPS whatchamacallits.
    Jarrett Dorough

    Lover of 29mm motors and wood glue

  11. #41
    Join Date
    18th October 2016
    Posts
    609
    Quote Originally Posted by grouch View Post
    So I guess straight RDF is out of fashion these days.
    RDF definitely still works like a champ!
    TRA L2. I-class record: "Vanish 29" with an I224, 14,596ft, Mach 1.92. Video here.

  12. #42
    Join Date
    18th March 2009
    Location
    Wisconsin
    Posts
    3,830
    Quote Originally Posted by grouch View Post
    So I guess straight RDF is out of fashion these days.
    I still use my Walston. I do not have a GPS unit- yet.

    I have seen some weird things with GPS- lock issues mostly that cause issues in finding the rocket. In 18 years of RDF I have had one rocket I could not find. That was due to my error- underestimated the tracker mount needed on a pretty high g flight- and the transmitter broke. I could hear the beep, it took off, and I heard a strange high pitched chirp and nothing.

    A good friend of mine who had GPS issues saw me find a friends rocket with a Walston in it. It was about two miles away in the middle of a soybean field. Since then, he might still fly the GPS, but he always flies a transmitter so he can RDF with the used Walston he picked up.
    Mark Koelsch
    Tripoli 6155 L3
    Owner of http://www.rocketryfiles.com/
    Editor of http://www.thrustcurve.org/
    Member of the Tripoli Motor Test Committee, and keeper of the motor file

  13. #43
    Join Date
    19th January 2009
    Location
    Stafford VA
    Posts
    7,189
    I love my T3, but I still put the RDF in if I expect it might get out of visual range. I still don't trust the GPS, too much that can go wrong.

    The last flight with the T3 showed the rocket location where it had hit apogee which was close to 90 degrees in the wrong direction and 2000 ft. from where we watched it actually land. The GPS location never moved from that wrong location until I took the receiving unit with me and moved toward the rocket. The GPS track slowly kept moving on a straight line from apogee to where the rocket actually landed as I got closer to it. I was at the rocket for several minutes as the GPS track kept moving and finally indicated the actual location? I have no clue what caused this, but I now trust the T3 much less than I used to.

    I'll still keep the RDF setup and keep practicing with it.
    Last edited by Handeman; 29th April 2018 at 03:39 PM.
    Handeman

    TRA #09903 L3 3/29/2015

    "If you don't use your head, you have to use your feet!" my Dad

    Tripoli Central Virginia #25 - BattlePark.org

  14. #44
    Join Date
    6th September 2009
    Posts
    1,796
    Quote Originally Posted by cerving View Post
    I've seen other people with similar RL issues. That's why I recommend using the LCD receiver with the Bluetooth module... if you lose the Bluetooth feed or the software craps out, you still have the coordinates as a backup.
    I just did a comparison test of RocketLocator, Bluetooth GPS, and RocketTrack on my Samsung S6 when paired with the T3. My winner = RocketTrack

    When the receiver loses the signal, RL and BTGPS run the risk of losing the last known coordinates. Merely rotating the phone orientation from portrait to landscape will cause the logs screen to go blank! Big problem.

    RocketTrack will preserve the last coordinates when signal is lost, even when rotating the screen. However, it will erase the info if you switch back and forth with other apps on the device. Still a big problem, but not as bad as the other two.

    Moral of the story: Use RocketTrack. Keep the RocketTrack app active on the phone. Take lots of screen grabs, just in case!

    Note: RocketTrack is not on Google Play. It was posted here on the forum as an apk download requiring a manual installation.

  15. #45
    Join Date
    26th November 2009
    Posts
    5,246
    One will have to hit a button on their Android device to allow installation from unknown sources to get RT in. Plus they will have to have a live online access to get the maps on their screen as there is no large scale map caching with RT. They are nice photomaps so it is nice to see where the rocket is headed.

    GPSRL is confined to Open Source line maps that do the job. Google nixed GPSRL except if one cached their maps to their device before they went away. First thing I did was go to work on a weekend and downloaded 750mb of photomaps for GPSRL of various zoomlevels at two of my closest sites to fly. Kurt

  16. #46
    Join Date
    23rd March 2011
    Location
    Germantown, Ohio
    Posts
    482
    Installed RT and will give it a test at our next launch.

    Gary Dickinson - Prefect
    Tripoli Mid Ohio #31
    TRA #5520 - L3 - TAP

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