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  1. #61
    Join Date
    19th February 2017
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    The world, probably
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    466
    Aaaand PCBs and parts ordered. Should be here in a few weeks.

    NAR #104043

    crmrc.org

  2. #62
    Join Date
    19th February 2017
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    The world, probably
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    Never mind about a few weeks, OSH Park upgraded me to the fast panel for free because they had a few square inches of space free... That panel ships within 5 business days.

    However, I won't be able to do much assembling as of yet, as the electronic parts are still on the way from China... So I'll have something in a week or 2 but no assembling will happen for a bit after that.

    NAR #104043

    crmrc.org

  3. #63
    Join Date
    23rd July 2011
    Location
    Butte, MT
    Posts
    2,271

    ArdIU - Open source flight computer w/ ATMega328

    Quote Originally Posted by LithosphereRocketry View Post
    The EEPROM thing combined with my current setup was kinda what I was thinking, and I'd love to be able to use the built-in brownout detection. However, I have two questions/concerns-

    - It seems I have to modify the Arduino bootloader to enable brownout detection. This isn't something I've done before, and I'd like to avoid it if at all possible. However, if I can make minor modifications and end up with a more reliable altimeter, that would be fine.

    - How is a brownout any different from simply disconnecting the power and reconnecting for the next flight? If you have to hit the reset button every time that's really no better than having a separate key.


    About electronic deployment- I was under the impression that those under 18 can't do electronic deployment, going by this bit of text from the NAR Jr certification page:


    If electronic deployment is allowed but the BP has to be purchased by an adult, then I'd love to set up an electronic deployment system to test the ArdIU. However, I would have thought that the NAR would include something about that possibility if it were the case.
    Donít read more into the certification requirements than what is written.
    Until youíre 18 your HPR motors and your BP must be purchased and handled by an adult, but that doesnít mean you canít fly dual deployment.
    Steve Shannon
    L3CC, TAP, Director, Tripoli Rocketry Association

  4. #64
    Join Date
    29th December 2013
    Location
    Bayport MN
    Posts
    160
    Quote Originally Posted by Steve Shannon View Post
    Donít read more into the certification requirements than what is written.
    Until youíre 18 your HPR motors and your BP must be purchased and handled by an adult, but that doesnít mean you canít fly dual deployment.
    Tripoli and NAR handle this a bit differently. Tripoli allows mentored flights within the certification and competence level of the mentor. The TRA mentor is charged to 'ensure that every rocket used in a mentored flight is built with the level of skill necessary for the project'. If you can build it and demonstrate to your competent & qualified mentor (who should be monitoring the build, much like a TAP monitors a level 3 project), your mentor can allow you to fly it.
    NAR's web page states as of their 2009 rules revision:
    • "Qualifying junior members at this level permits them to fly single or multiple motor rocket flights with motors having a maximum total impulse of 640.00 Newton seconds.

      The qualification flight and all future flights must be single deployment only. This is due to regulatory requirements of ejection charges used in dual deployment systems. On board electronic devices are permitted as long as they are not used for deployment.

      As models with hybrid motors require regulated ejection methods, they are not permitted to be used by the Junior HPR Level 1 Participant at this time"


    Please correct me if there is a more recent revision to the NAR program.
    L1 - Madcow 4" Phoenix I180 Skidmark 1651 feet
    L2 - Darkstar 2.6" J145 Skidmark longburn 4787 feet
    L3 - Terminator 5" M1297 White Lightning 8602 feet

    TRA 15743
    NAR 30949
    http://www.rocketreviews.com/karl-tyrrells-page.html

  5. #65
    Join Date
    23rd July 2011
    Location
    Butte, MT
    Posts
    2,271
    Quote Originally Posted by Thorfire View Post
    Tripoli and NAR handle this a bit differently. Tripoli allows mentored flights within the certification and competence level of the mentor. The TRA mentor is charged to 'ensure that every rocket used in a mentored flight is built with the level of skill necessary for the project'. If you can build it and demonstrate to your competent & qualified mentor (who should be monitoring the build, much like a TAP monitors a level 3 project), your mentor can allow you to fly it.
    NAR's web page states as of their 2009 rules revision:
    • "Qualifying junior members at this level permits them to fly single or multiple motor rocket flights with motors having a maximum total impulse of 640.00 Newton seconds.

      The qualification flight and all future flights must be single deployment only. This is due to regulatory requirements of ejection charges used in dual deployment systems. On board electronic devices are permitted as long as they are not used for deployment.

      As models with hybrid motors require regulated ejection methods, they are not permitted to be used by the Junior HPR Level 1 Participant at this time"


    Please correct me if there is a more recent revision to the NAR program.
    You are correct. The NAR Jr. L1 program specifically prohibits a Jr. L1 flyer from flying dual deployment during or after certification, until their 18th birthday. I was wrong.
    And yes, the Tripoli mentoring program would allow him to fly dual deployment, but he would still have to have an adult prepare the motor and handle the BP.
    Steve Shannon
    L3CC, TAP, Director, Tripoli Rocketry Association

  6. #66
    Join Date
    19th February 2017
    Location
    The world, probably
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    Quote Originally Posted by Steve Shannon View Post
    You are correct. The NAR Jr. L1 program specifically prohibits a Jr. L1 flyer from flying dual deployment during or after certification, until their 18th birthday. I was wrong.
    And yes, the Tripoli mentoring program would allow him to fly dual deployment, but he would still have to have an adult prepare the motor and handle the BP.
    OK, that's what I thought. Guess I won't be testing DD capabilities after all.

    However, what I can do is have some kind of visual "charge" that doesn't actually do anything functionally- anybody know if a Christmas light is visible at 1000ft?

    This also brings up an interesting point. I'm planning on testing with staging to get around the "no BP" rule, and many clubs require a tilt lockout when possible (not mine AFAIK, so this is just a thought experiment.) The ArdIU can do tilt lockout with its MPU6050 IMU, however, if the motor locks out, I don't get an ejection charge. So which is preferable- the upper stage igniting off center and traveling for miles, or not igniting at all and lawn darting? I would assume any parachute is better than none, but I'd be interested to see what people think.
    NAR #104043

    crmrc.org

  7. #67
    Join Date
    9th October 2013
    Location
    San Jose, CA
    Posts
    659
    Quote Originally Posted by LithosphereRocketry View Post
    However, what I can do is have some kind of visual "charge" that doesn't actually do anything functionally- anybody know if a Christmas light is visible at 1000ft?
    I sincerely doubt it, especially in daylight, they're often barely visible from tens of feet during the day. But is the rule strictly against BP? I'd wonder if you could set off e-matches even if they didn't have any BP, then you could at least see if the matches fired. But I haven't read any of the rules, just asking questions.
    Will Ferry (Launches & Videos) NAR #96512 (L2) / TRA #15328 (L2) / LUNAR #2759
    L1: 9/2013 @ XPRS, GLR T-Bolt "Thunderbolt" (R.I.P.), H148R
    L2: 4/2016 @ TCC Helm, Binder Design Excel w/DD "dd2.xls", J315R
    Impulse flown (flights): 2013: 767Ns (2), 2014: 4298Ns (8), 2015: 7486Ns (16), 2016: 11693Ns (18), 2017: 11138Ns (16)

  8. #68
    Join Date
    19th February 2017
    Location
    The world, probably
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    Quote Originally Posted by woferry View Post
    I sincerely doubt it, especially in daylight, they're often barely visible from tens of feet during the day. But is the rule strictly against BP? I'd wonder if you could set off e-matches even if they didn't have any BP, then you could at least see if the matches fired. But I haven't read any of the rules, just asking questions.
    I think the regulation is because BP has to be handled by adults, so an ematch taped to the side or something would be OK- not sure though. Here's an interesting idea- many reload manufacturers are OK with people putting foreign objects in their BP wells. So can I legally use the BP well on a reload as a charge well as a backup- similar to what I've seen people do with 2 matches per charge? The idea would be to drill a hole in the little red cap (or poke a hole in the paper with CTI) and stick an ematch in that, with some kind of breakaway connector to the ArdIU.

    The first step of course would be to just fly it "dry" and record on the SD card when charges "fire".
    NAR #104043

    crmrc.org

  9. #69
    Join Date
    23rd July 2011
    Location
    Butte, MT
    Posts
    2,271
    Just have an adult fly it.


    Steve Shannon
    Steve Shannon
    L3CC, TAP, Director, Tripoli Rocketry Association

  10. #70
    Join Date
    8th October 2016
    Location
    Midwest
    Posts
    129
    Question: Do the rules regarding BP for Jr. fliers also include BP alternatives like Mr. Nakka's Crimson Powder?

  11. #71
    Join Date
    12th September 2013
    Location
    SE Wisconsin
    Posts
    1,032
    You could do motor deploy and a hot wire cutter chute release.
    Charles McGonegal
    Ciderwright at AeppelTreow Winery & Distillery
    www.appletrue.com
    NAR #103560 L1 6/25/17 Estes Leviathan CTI H175-SS
    Ad Astra Tabernamque!

  12. #72
    Join Date
    23rd July 2011
    Location
    Butte, MT
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    2,271
    Quote Originally Posted by Tobor View Post
    Question: Do the rules regarding BP for Jr. fliers also include BP alternatives like Mr. Nakka's Crimson Powder?
    Not the way they are written. See post 64.
    Steve Shannon
    L3CC, TAP, Director, Tripoli Rocketry Association

  13. #73
    Join Date
    19th February 2017
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    The world, probably
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    Quote Originally Posted by Charles_McG View Post
    You could do motor deploy and a hot wire cutter chute release.
    That's an interesting thought- I'd have to read up on that. I do have some nichrome wire somewhere...

    Sent from my LGL44VL using Tapatalk
    NAR #104043

    crmrc.org

  14. #74
    Join Date
    12th September 2013
    Location
    SE Wisconsin
    Posts
    1,032
    Here's mine :
    Eggtimer Quark based chute tender

    http://www.rocketryforum.com/showthread.php?t=129976
    Charles McGonegal
    Ciderwright at AeppelTreow Winery & Distillery
    www.appletrue.com
    NAR #103560 L1 6/25/17 Estes Leviathan CTI H175-SS
    Ad Astra Tabernamque!

  15. #75
    Join Date
    12th September 2013
    Location
    SE Wisconsin
    Posts
    1,032
    And another based on a Quantum
    Quantum based hotwire chute release

    http://www.rocketryforum.com/showthread.php?t=141642
    Charles McGonegal
    Ciderwright at AeppelTreow Winery & Distillery
    www.appletrue.com
    NAR #103560 L1 6/25/17 Estes Leviathan CTI H175-SS
    Ad Astra Tabernamque!

  16. #76
    Join Date
    19th February 2017
    Location
    The world, probably
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    466
    Before I get into deployment of any kind, I need to build an altimeter. Speaking of which, my PCBs came in the mail today. Very nice quality, I'll post pics soon.

    Now to wait another week or two for the rest of the parts...

    Sent from my LGL44VL using Tapatalk

    NAR #104043

    crmrc.org

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