A New Ballistics Spreadsheet is About to Drop!

Discussion in 'Announcements and Member Feedback' started by spamassassin, Apr 24, 2016.


Do you use Density Altitude or Absolute Air Density?

Density Altitude for me 0 vote(s) 0.0%
Absolute Air Density for me 2 vote(s) 40.0%
Esoteric much? I have no idea what you're talking about so... Potato 2 vote(s) 40.0%
I do know what you're talking about but I don't use either. 1 vote(s) 20.0%
  1. spamassassin Well-Known Member

    Member Since:
    Aug 8, 2014
    Message Count:
    Pardon the pun.

    Most of you know I publish Ballistic_XLR which is a Pejsa model ballistics calculator implemented in Microsoft Excel meant for making printable data tables. Well, I'm bringing out another product:

    Introducing <insert name here>. Yeah, I haven't got a name for it yet. I'm thinking about a couple particular names but any suggestions are welcome.

    Rather than requiring the user to know their temperature and pressure to high degrees of accuracy this new version only requires that you can establish your Density Altitude. Density altitude is useful for pilots and those with experience using it as well as anyone that's in a hurry when plotting a firing solution. With DA you establish your effective altitude and use the table that references an altitude closest to that. It's fast as heck but prone to being a bit more coarse. I don't see any difference between the two systems other than I prefer to not use DA for most things I do. It's not worse, just not my preference.

    The new spreadsheet has tables for -4000 to 11000ft in increments of 500ft. It's one page per elevation band. It's not available for download yet as I still have a solid 50K more cell formulae to input across a bit over 20 tabs. That's not bad since I started with just over 300K cells that needed formulae input into them.

    I've attached a PDF showing approximately what the data tables will look like. This project was funded by a user of Ballistic_XLR that wanted DA capability, so I might just name it after the benefactor that donated money to make it happen.

    Attached Files:

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