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  1. #61
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    26th November 2009
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    Quote Originally Posted by Buckeye View Post

    Anyway, what do you guys think about shrink wrapping the LiPo to the rocket board, ala BRB900? I see all these pics of Eggfinders and such with elaborate mounting of the battery and the board to a sled, creating a large footprint. My BRB900 is a nice, tidy package that fits almost anywhere with some bubble wrap.
    As long as there is nothing to squish on the backside of the board, it should be doable
    if you like. Kurt


  2. #62
    Join Date
    4th January 2012
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    1,540
    Updates:

    We're getting close to catching up on the T3 order backlog, so thanks all for your patience... transitioning from proto's to production for the first time is always interesting too. Sorry about the "hidden" antenna verbiage... I have taken a new product picture to show all the pieces.
    http://www.missileworks.com/store/#!.../90226446/cate

    Jim Amos
    www.missileworks.com
    TRA 5715/NAR 24853

  3. #63
    Join Date
    6th September 2009
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    Nice. Thank you!

  4. #64
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    26th November 2009
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    Broke down and received a T3 yesterday. Did a quick setup and pairing with two Nexus 7's (2012 and 2013) and
    "GPS Rocket Locator" works with it right out of the box. I paired the base via B/T to a Linux tablet without any
    issue. Got placed at /dev/rfcomm1 (rfcomm0 had a Mobilnk TNC feeding a program on it). Changed the permission,
    set the datastream coming in over the port as "My" local position and the strings were being decoded very nicely in Xastir.

    I have a python script so I can get the strings converted to APRS and a tracked rocket can be displayed on the Xastir map nicely.

    Tried to get Winblows to pair and use the HC-06 and as usual, it screws it up royally. Tried using the com10 and com13 ports to pipe the strings to a few apps and no freaking dice. This is a Winblows problem as opposed to
    the T3. I did find with experimenting with the 3DR radios, the HC-05 seemed to work on a more stable fashion
    than the HC-06. Go figure. Again, not a fault of the T3 but an issue with WinDoze.

    Again, Android and Linux works fine. Could be my Winblows installation too. Kurt

  5. #65
    Join Date
    22nd February 2013
    Location
    Garland, TX
    Posts
    3,646
    Been playing with my T3 too. Nice piece of kit, but bigger (thicker) than I expected. I'm gonna get that thing in a 38 NC all nice and secure though...I'm getting close.
    So much of my rocket building time has been diverted toward my "other hobby": Race Timing

  6. #66
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    6th September 2009
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    Quote Originally Posted by ksaves2 View Post
    As long as there is nothing to squish on the backside of the board, it should be doable
    if you like. Kurt
    I am not smart enough to tell what is squishable, hence my question.

  7. #67
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    15th October 2016
    Location
    Huntsville AL
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    I will be doing no squishing when I get mine lol

  8. #68
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    26th November 2009
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    Quote Originally Posted by Buckeye View Post
    I am not smart enough to tell what is squishable, hence my question.
    The X-bee module is on the other side and doesn't cover the full length of the board. Pulled out one of my LP Beeline GPS units and the T3 is physically smaller. If you go to shrink wrapping a 750mah 1S lipo on the backside, just make sure no metal touches the traces of the X-bee Rf module. Looks doable. Eyeballing it, it's about the same thickness as a Beeline GPS if you shrink wrap a 750Mah 1S pack to it . (There were no discrete components on the opposite side to get "squished" as far as I can see.)

    I did a run and messed around for ~2 hours or a little bit more and nearly sucked a 500mah
    1S pack dry. I apologize as I didn't keep track of time but I believe I easily got over 2 hours.

    Remember, It's putting out 250Mw as opposed to 100Mw of other units. Power consumption is higher and should be expected. On this 33cm band, more power is desirable to stretch the range a bit. Kurt
    Last edited by ksaves2; 12th October 2017 at 12:49 PM. Reason: Grammar

  9. #69
    Join Date
    4th January 2012
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    1,540
    Glad to learn all your wares are operational, guys. Each system is end-to-end tested after I setup the XBee network configuration and make the radio power junction shunt. End-to-end is from Rocket uBlox7/XBee to Base XBee/HC-06 to Android...

    These are power hungry little beasites with all that NMEA "payload fluff" and the ~200ma pull during transmit... my bench test was just minutes shy of 4 hours continuous data using a 1S 750mAh NanoTech.

    We'll be caught up this weekend on backorders and I'm hoping to design some PLA boxes and adapters for easy setups.
    Jim Amos
    www.missileworks.com
    TRA 5715/NAR 24853

  10. #70
    Join Date
    3rd February 2017
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    95
    Something I would like to see in the design of the box is someway to either hang it around your neck or a belt/pocket clip.

  11. #71
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    26th November 2009
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    Quote Originally Posted by captbk View Post
    Something I would like to see in the design of the box is someway to either hang it around your neck or a belt/pocket clip.
    I'd just velcro it to your hat with a right angle Antenna adapter.�� Kurt !

  12. #72
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    3rd February 2017
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    Quote Originally Posted by ksaves2 View Post
    I'd just velcro it to your hat with a right angle Antenna adapter.�� Kurt !
    Click image for larger version. 

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  13. #73
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    4th January 2012
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    Quote Originally Posted by ksaves2 View Post
    I'd just velcro it to your hat with a right angle Antenna adapter.�� Kurt !
    Our duck antenna's bend to 90 deg already, so we're already *hat friendly*
    Jim Amos
    www.missileworks.com
    TRA 5715/NAR 24853

  14. #74
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    22nd February 2013
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    Garland, TX
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    It was hard (at least for me) to get this thing in a 38 NC, but I got it last night...that terminal block was brutal, but convenient to have. Again, Jim, nice product.
    Last edited by Cl(VII); 13th October 2017 at 07:14 PM.
    So much of my rocket building time has been diverted toward my "other hobby": Race Timing

  15. #75
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    26th November 2009
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    Quote Originally Posted by Cl(VII) View Post
    It was hard (at least for me) to get this thing in a 38 NC, but I got it last night...that terminal block was brutal, but convenient to have. Again, Jim, nice product.
    Make sure you didn't smash the wire antenna if that it what you're using. Kurt

  16. #76
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    22nd February 2013
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    Garland, TX
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    Quote Originally Posted by ksaves2 View Post
    Make sure you didn't smash the wire antenna if that it what you're using. Kurt
    I have the RPSMA, but there is breathing room between board and sled.
    So much of my rocket building time has been diverted toward my "other hobby": Race Timing

  17. #77
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    6th September 2009
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    1,608
    Have any of you clever 3D printers designed an enclosure for the base unit, yet?

  18. #78
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    22nd February 2013
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    Garland, TX
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    Quote Originally Posted by Buckeye View Post
    Have any of you clever 3D printers designed an enclosure for the base unit, yet?
    Short answer, yes. Currently working with a second set of eyes to get it finalized.
    So much of my rocket building time has been diverted toward my "other hobby": Race Timing

  19. #79
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    6th September 2009
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    1,608
    Quote Originally Posted by Cl(VII) View Post
    Short answer, yes. Currently working with a second set of eyes to get it finalized.
    Cool. Are you selling, like your other 3D printed items? If so, I am interested.

  20. #80
    Join Date
    19th January 2009
    Location
    Stafford VA
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    6,968
    I got the T3 system a couple weeks ago and got some 600mhA S1 batteries in and charged last night. I fired up the transmitter and reciever, synced to my cell phone and installed Rocket Locator. The better half walked the transmitter around the neighborhood and everything went great.

    Used it three times at BattlePark today. Highest flight was +5700 ft., the fastest was ~650 mph, the farthest landing was about 2000 ft away. The transmitter and battery was wrapped in bubble wrap and then sandwiched between two pieces of foam rubber and wrapped with electrical tape. That was taped to the shock cord. The receiver was mounted in a small plastic box by drilling a 1/4" hole in it and tightening the nut and washer on the antenna mount. A switch was added and the lipo was taped into the box.

    Everything synced up just fine and Rocket Locator app worked OK. It took a while to get the maps to show up and was probably a function of cell service, although we get 2 or 3 bars of 4G at the field. It started with just the map, but later showed the Satellite view which works very well. I did find that once you have the landing position of the rocket, you can turn off the receiver and Rocket Locator will still show the rocket location and yours and direct you to the rocket. The only thing about going out and retrieving without the receiver is that the position might not be quite so accurate. Without updates from the transmitter as you get closer and the GPS has settled in, you might be off a bit. I was 75 to 100 ft off on one flight. The ones where I took the receiver along were much closer.

    All in all, a great little system and everyone that saw it and how it works on the phone wants one too.
    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

  21. #81
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    6th September 2009
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    1,608
    Nice report, Handeman.

    I was reading through the documentation and found this odd warning:

    IMPORTANT: Ensure your T3 is oriented in your rocket or av‐bay to avoid having the patch antenna placed
    near or against your launch pad rail or tower rails.**This proximity will block all satellite reception and
    prevent acquisition of a GPS coordinate fix.


    This is the first time I ever saw a tracker warn about a launch pad blocking reception! How much is "near?" I mean, my 38MD is going to have the antenna 19mm away from the rail, and there is not much I can do about that.

    Did anybody experience this, and did reception return after the rocket left the pad?

  22. #82
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    15th October 2016
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    Huntsville AL
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    1,680
    wireless isn't my wheelhouse, but I can imagine it meaning "Don't stick the tracker so the rail is sitting smack in front of the antenna"

    Awaiting clarification

  23. #83
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    19th January 2009
    Location
    Stafford VA
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    I don't know if I've had that issue or not. I don't think so. I know the older one has had issues with the rail causing it to loose lock with the handheld unit. I've witnessed a few scrubbed launches because of that. I usually watch the track of the rocket from the table to the RSO and then to the pads. If it looses lock then, I don't know. The Rocket Locator app continues to show the rocket location if it has a lock or not. Once it's launched, it has worked great.
    I haven't had any problems with it and was sure glad I put it in my L3 bird today. I wasn't going to because it's so big and only going about 5500 ft. I wasn't going to loose sight of it. But after the first rocket went off the away pad and I saw how strong and direction of the upper level winds, I put it in. Ended up 3/4 mile away and in a 40 acre corn field. The Rocket Locator had downloaded the satellite images so I had a good visual of nearby landmarks. Ended up walking right to it. We brought the receiver along this time and it was only off be less then 5 ft. by the time we got to the rocket.
    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

  24. #84
    Join Date
    4th January 2012
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    Quote Originally Posted by Buckeye View Post
    I was reading through the documentation and found this odd warning:

    IMPORTANT: Ensure your T3 is oriented in your rocket or av‐bay to avoid having the patch antenna placed
    near or against your launch pad rail or tower rails.**This proximity will block all satellite reception and
    prevent acquisition of a GPS coordinate fix.


    This is the first time I ever saw a tracker warn about a launch pad blocking reception! How much is "near?" I mean, my 38MD is going to have the antenna 19mm away from the rail, and there is not much I can do about that.

    Did anybody experience this, and did reception return after the rocket left the pad?
    Sorry for the confusion...

    The GPS patch antenna is very directional, so if it's pointing at the rail while situated in your cone or av-bay you're gonna block the majority of its horizon/satellite view. It's not the proximity of the rail and the patch antenna, it's the orientation of the patch antenna in relation to the rail.

    Hope that clarifies what I was meaning to say...
    Jim Amos
    www.missileworks.com
    TRA 5715/NAR 24853

  25. #85
    Join Date
    4th January 2012
    Posts
    1,540
    Chris Bender and I have reached an agreement to source and sell his extremely cool and expertly engineered 3D printed PETG wares.
    I have just added the new T3 Modular Sled System and T3 Base Box Housing to our shopping cart.
    https://www.missileworks.com/store/#...=0&sort=normal
    Jim Amos
    www.missileworks.com
    TRA 5715/NAR 24853

  26. #86
    Join Date
    15th October 2016
    Location
    Huntsville AL
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    Perfectly clear.

    If you want to light the room with a flood light, don't shine it strat at a column lol

  27. #87
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    19th January 2009
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    Stafford VA
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    I had just bubble wrapped it and taped it to the shock cord. Guess I got lucky, but will be more conscience of the orientation from now on. All I know is, it probably saved me hours of wandering through 8 ft. high corn yesterday.
    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

  28. #88
    Join Date
    4th January 2012
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    1,540
    Quote Originally Posted by Handeman View Post
    I had just bubble wrapped it and taped it to the shock cord. Guess I got lucky, but will be more conscience of the orientation from now on. All I know is, it probably saved me hours of wandering through 8 ft. high corn yesterday.
    That works and is quite common... pay attention to the patch orientation relative to your rail guides and all will work well. The alternative is to mount the transmitter horizontally so the patch points skyward, but that requires a much larger diameter airframe.
    Jim Amos
    www.missileworks.com
    TRA 5715/NAR 24853

  29. #89
    Join Date
    26th November 2009
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    4,712
    Quote Originally Posted by Handeman View Post
    I don't know if I've had that issue or not. I don't think so. I know the older one has had issues with the rail causing it to loose lock with the handheld unit. I've witnessed a few scrubbed launches because of that. I usually watch the track of the rocket from the table to the RSO and then to the pads. If it looses lock then, I don't know. The Rocket Locator app continues to show the rocket location if it has a lock or not. Once it's launched, it has worked great.
    I haven't had any problems with it and was sure glad I put it in my L3 bird today. I wasn't going to because it's so big and only going about 5500 ft. I wasn't going to loose sight of it. But after the first rocket went off the away pad and I saw how strong and direction of the upper level winds, I put it in. Ended up 3/4 mile away and in a 40 acre corn field. The Rocket Locator had downloaded the satellite images so I had a good visual of nearby landmarks. Ended up walking right to it. We brought the receiver along this time and it was only off be less then 5 ft. by the time we got to the rocket.
    Be careful!! Recovery using a photomap can get pretty addictive and leads to one flying more rockets in a given timeframe. Kurt

  30. #90
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    6th September 2009
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    1,608
    Quote Originally Posted by MWC View Post
    That works and is quite common... pay attention to the patch orientation relative to your rail guides and all will work well. The alternative is to mount the transmitter horizontally so the patch points skyward, but that requires a much larger diameter airframe.
    OK, the words are getting more confusing. To me, the logical orientation is to position the antenna parallel to the long axis of the transmitter and parallel to the rail. Is this picture correct?

    Click image for larger version. 

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