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  1. #61
    Join Date
    1st May 2009
    Location
    Perth, Western Australia
    Posts
    65
    Also, Alex, your altimeter comparison spreadsheet doesn't appear include the AltusMetrum TeleMini.


  2. #62
    Join Date
    26th September 2014
    Location
    Herndon,VA,USA
    Posts
    48
    anyone know what the smallest and cheapest altimeter you can use with smaller estes rockets?.I think the smallest is 10mm? thanks


  3. #63
    Join Date
    13th October 2014
    Location
    SouthEastern, WA
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    5,202
    Quote Originally Posted by Dale View Post
    anyone know what the smallest and cheapest altimeter you can use with smaller estes rockets?.I think the smallest is 10mm? thanks
    Heres a repost for a good comparison website. http://rocketsetc.com/data/
    Rich

    NAR# 99154

    L3-4x upscale Estes Cherokee-D- AT M1297W 5/28/2016 http://www.rocketryforum.com/showthr...r-rharshberger

    TriCities Rocketeers NAR section# 736 http://www.tricitiesrocketeers.org/

  4. #64
    Join Date
    26th September 2014
    Location
    Herndon,VA,USA
    Posts
    48
    I saw that before,but it didn't help much.

  5. #65
    Join Date
    13th October 2014
    Location
    SouthEastern, WA
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    5,202
    Quote Originally Posted by Dale View Post
    I saw that before,but it didn't help much.
    That list can be sorted by Fit the smallest are the PicoAlt PICO-P1 and the Adrel BMP, the first fits a 12mm tube (BT-5) and the second a 13mm tube, the prices have probably increased a bit from $40 and $55. There may be other newer ones that will fit small airframes but those are the smallest two listed.
    Rich

    NAR# 99154

    L3-4x upscale Estes Cherokee-D- AT M1297W 5/28/2016 http://www.rocketryforum.com/showthr...r-rharshberger

    TriCities Rocketeers NAR section# 736 http://www.tricitiesrocketeers.org/

  6. #66
    Join Date
    30th January 2016
    Location
    US > OK > NE
    Posts
    2,613
    ALT-BMP has shrunk : 7,9 x 19,3 x 4,9 mm (with connector); 0.6g not including battery.

    It can fit in a 10mm -coupler-.

  7. #67
    Join Date
    26th September 2014
    Location
    Herndon,VA,USA
    Posts
    48
    thank you sirs.

  8. #68
    Join Date
    26th September 2014
    Location
    Herndon,VA,USA
    Posts
    48
    hmm,the pico website does not work.I get google error "server not connected". adrel is in poland.prices are in euros and shipping must be crazy high.those are out,lol.

  9. #69
    Join Date
    13th October 2014
    Location
    SouthEastern, WA
    Posts
    5,202
    Quote Originally Posted by Dale View Post
    hmm,the pico website does not work.I get google error "server not connected". adrel is in poland.prices are in euros and shipping must be crazy high.those are out,lol.
    iirc there is supposed to be a Adrel dealer in the US, someone on TRF mentioned it not long ago.
    Rich

    NAR# 99154

    L3-4x upscale Estes Cherokee-D- AT M1297W 5/28/2016 http://www.rocketryforum.com/showthr...r-rharshberger

    TriCities Rocketeers NAR section# 736 http://www.tricitiesrocketeers.org/

  10. #70
    Join Date
    30th January 2016
    Location
    US > OK > NE
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    2,613
    Adrel shipping took a while, but was not outrageous.

  11. #71
    Join Date
    26th September 2014
    Location
    Herndon,VA,USA
    Posts
    48
    maybe jolly logic will come out with a smaller unit. I have the altimeter one.

  12. #72
    Join Date
    13th October 2014
    Location
    SouthEastern, WA
    Posts
    5,202
    Quote Originally Posted by Dale View Post
    maybe jolly logic will come out with a smaller unit. I have the altimeter one.
    I hear John is working on the JL4 and its pretty small.
    Rich

    NAR# 99154

    L3-4x upscale Estes Cherokee-D- AT M1297W 5/28/2016 http://www.rocketryforum.com/showthr...r-rharshberger

    TriCities Rocketeers NAR section# 736 http://www.tricitiesrocketeers.org/

  13. #73
    Join Date
    26th September 2014
    Location
    Herndon,VA,USA
    Posts
    48
    Thanks Rich.

  14. #74
    Join Date
    3rd May 2011
    Location
    Blacksburg VA
    Posts
    8
    Quote Originally Posted by azzie View Post
    My attempt to simplify it resulted in an extensive list of all currently available model rocket altimeters and their parameters, such as dimensions, weight, sensors being used, interfaces, pyro options, battery and voltage requirements, etc. All data was compiled from vendor datasheets and manuals. If it's something TRF community finds useful, I'd keep maintaining it.

    Link: Model rocket altimeters: Comparison guide.

    Now here's how you could help: I'm missing some data for few altimeters (look for question marks), mostly related to dimensions and recording functions. If you have one, measure it / post a file with a recorded flight, and I'll update the guide accordingly.

    All comments (except negative ones) are welcome!

    --Alex
    http://RocketsEtc.com/
    Great job Alex.

    Why hasn't someone logged the AltiDuo ($30 arduino altimiter with digital filtering). It's a great little unit that comes in kit or as a completed.

    http://rocket.payload.free.fr/index....emid=3&lang=en

    Tweeks

  15. #75
    Join Date
    19th February 2009
    Location
    Auburn, WA USA
    Posts
    1,865
    Alex,

    Three updates: first, the Altus Metrum microPeak's price was reduced to $30 for the unit itself some time ago. (http://shop.gag.com/altimeters/micropeak.html)

    Second, the long-advertised external data display device for the PerfectFlite FireFly is now real and available. It provides a means to read apogee, peak speed, time to apogee, total flight time, descent rate, and battery voltage of both the display unit itself and the FireFly via an LCD display. Here's the display unit: http://www.perfectflitedirect.com/fi...-data-display/ I have one and it works actually quite nicely. Oddly, it's not yet on the regular PerfectFlite site. Maybe a notation over in the OS column for the FireFly would be where you'd mention this, since it's not essential to use the unit as a peak-reading altimeter. Or maybe an addition to the "Click!" notation in the "Record" column. Whatever works best for keeping things consistent.

    Finally, the NAR has recently revised the list of altimeters accepted for competition use, and the list is much shorter than before. The current list is here: http://www.nar.org/contest-flying/us...r-contest-use/ So....some of the check marks to remove from the "competition" column.
    Bernard Cawley
    NAR 89040 L1
    AMA 42160
    KG7AIE

  16. #76
    Join Date
    11th April 2017
    Location
    Brisbane Australia
    Posts
    202
    One data point that might be worth adding - support for staged rockets - my emails to @John Bean last week confirmed that the Altimeter3 will likely not understand a multi staged rocket... Given he's on the thread, he might be able to expand...
    Reasonably new to rocketry and hailing from the land down under.. I speak metric... I know not of these feet and inches you speak of...

    QRS: #193
    AMRS: #148

  17. #77
    Join Date
    26th November 2009
    Posts
    4,068
    I think the all time smallest baro dual deploy was the Pico unit but I suspect Robert Dehate is not selling them anymore. It will fit in just about any modroc but............ and I do mean but.............. Trying to get all the pieces into a small space is
    challenging and a setup interface has to be cobbled together and is not easy to change. There are also several wiring schemes suggested that would be confusing to a neophyte. Kurt

  18. #78
    Join Date
    5th June 2010
    Location
    Danville, CA
    Posts
    694
    Quote Originally Posted by snrkl View Post
    One data point that might be worth adding - support for staged rockets - my emails to @John Bean last week confirmed that the Altimeter3 will likely not understand a multi staged rocket... Given he's on the thread, he might be able to expand...
    Like AltimeterTwo, AltimeterThree expects one engine, so that's what it will report (and while some stats like apogee will be fine, othersólike max speedómay not). The second engine will be ignored, or in rare cases may fool the ejection detection and muck up some of the timing stats and the ejection altitude.

    With a slight tweak to software, we could add "2 Stage Analysis." That would lengthen the list of stats shown in the app, and add a stat for interstage coast. Max speed would continue to be calculated and would presumably occur during second stage boost.

    A stat for calculating Cd (decel * velocity^2) has also been requested.

  19. #79
    Join Date
    11th April 2017
    Location
    Brisbane Australia
    Posts
    202
    Quote Originally Posted by John Beans View Post

    With a slight tweak to software, we could add "2 Stage Analysis." That would lengthen the list of stats shown in the app, and add a stat for interstage coast. Max speed would continue to be calculated and would presumably occur during second stage boost.
    consider this my formal RFE (Request For Enhancement)!!

    Reasonably new to rocketry and hailing from the land down under.. I speak metric... I know not of these feet and inches you speak of...

    QRS: #193
    AMRS: #148

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