Altitude calculator

Discussion in 'The Watering Hole' started by John Taylor, Sep 18, 2019.

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  1. Sep 18, 2019 #1

    John Taylor

    John Taylor

    John Taylor

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    Hi,
    I have a android phone. Is there a free altitude calculator available? I have seen some simulation sites that require a person to be good at physics. I'm not.
    Thanks,
    John Taylor
     
  2. Sep 18, 2019 #2

    timbucktoo

    timbucktoo

    timbucktoo

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  3. Sep 18, 2019 #3

    dr wogz

    dr wogz

    dr wogz

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    +1 for thrustcurve.

    setting up an account is fairly easy & straight forward,. then, enter in your rocket fleet, and you have all you need.

    Even better, is downloading the cvs data and creating a fancy spreadsheet with all the pertinent info at your fingertips.

    I've purged all but the AT motors, as that's what I fly. I've made a fancy table sorted by motor size. I then have delay, max alt, max G, max velocity, etc.. for that motor. (I've even recently added case sizes, so that I can see what I can fly is another case is begin used!) plus chute size, rocket length & dia, so that filling out flight cards is quick & easy*. I can then tweak the Cd value to 'fine tune' the exact calculations it does to get a better / more accurate table.. I no longer need my phone or device or a link to the interweb.. paper, its old-school, but it works!

    * our club has editable PDF flight cards. SO, I've filled out a few & saved them for my more common flyers. Complete with name, location, rocket name, colour, length dia, etc.. I also have a sheet of labels with my name, cert level, NAR No. home city & province, so that, again, filling out flight cards is simple & quick..
     
  4. Sep 19, 2019 #4

    John Taylor

    John Taylor

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    Thank you!
     
  5. Sep 19, 2019 #5

    John Taylor

    John Taylor

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  6. Sep 19, 2019 #6

    Bat-mite

    Bat-mite

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    The only think non-intuitive on ThrustCurve is the coefficient of drag field. Keep in mind that smooth, perfect, polished rockets will go faster and higher than unfinished rockets, with a spectrum in between. I'd start my sims with 55%, then adjust up or down based on real life data. Higher number means more draggy, lower number less.
     
    GalantVR41062 and John Taylor like this.
  7. Sep 19, 2019 #7

    Wayco

    Wayco

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    I also base my Cd on flights I have done with commercial motors. After three or four flights, adjust your Cd so the simmed altitude matches (more or less) the real altitude you got with a specific motor listed on the motor guide. It also makes the delay time more accurate. If I had known about Thrustcurve earlier in my flying career, there would have been less zippers and torn out anchor points.
     
  8. Sep 20, 2019 #8

    John Taylor

    John Taylor

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    Thank you!
     
  9. Sep 20, 2019 #9

    scsager

    scsager

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    No More Mobile?

    I still have ThrustCurve on my OLD android phone, but I recently upgraded to a new phone (Android 9.0)
    Most of my apps were automatically reinstalled on the new phone when I set it up - except ThrustCurve.

    It didn't get installed on the new phone, and I don't even see it available in the Google Play store anymore.

    -what happened?
     
  10. Sep 20, 2019 #10

    JohnCoker

    JohnCoker

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    Google expired old apps and the build process and libraries I was using no longer work with the latest version of Cordova.

    On my to-do list is rebuilding the app with the latest packaging technology, but it's a long list. :)
     
  11. Sep 20, 2019 #11

    Mike Haberer

    Mike Haberer

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    Bummer. I was excited there for about two minutes (sigh)...
     
  12. Sep 20, 2019 #12

    jqavins

    jqavins

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    But it still works just fine on the web site, no app needed. Provided you have a data connection at the launch site.
     
  13. Sep 21, 2019 #13

    Mike Haberer

    Mike Haberer

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    Hi, John. I lost my password for Thrustcurve but am not getting the email with the password when I request it. It's not in my junk mail box. Thanks in advance for any assistance you can provide.
     

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