Ballistics for Excel Forum

Updates => Updates => Topic started by: admin on February 19, 2011, 12:49:34 AM

Title: BfX Update - Drag calculations all under standard ICA0 conditions and bugs fixed
Post by: admin on February 19, 2011, 12:49:34 AM
For BfX it was a day with improvements.

Now the calculation of drag based Pejsa's drag coeficients is also done at the standard ICAO pressure. I have used the opportunity - now that I know how Pejsa's drag function is based on Ingalls Mayevski's parametrizations of deacceleration - to introduce the Ingalss Mayevski drag function to BfX. Of course the associated drag is also calculated at ICAO conditions.

I have reproduced Ingalls table and will put the spreadsheet online soon. By doing so I found a bug in BfX_Xv (it didn't want to parse "fps") and repaired it. I encountered also a wrong conversion constant from inchHg to Pascals. Furthermore I introduced the PSI (pounds per square inch) to BfX.

These modifications had impact on the GettingStarted spreadsheet and hence I had to modify it a bit.

You can download the updates. Soon I will extend my site with a discussion on atmospheric conditions and drag calculations
Title: Re: BfX Update - Drag calculations all under standard ICA0 conditions and bugs fixed
Post by: ThunderDownUnder on February 19, 2011, 10:47:40 PM
More good news for BfX! I look forward to the discussion on atmospheric conditions and drag.

Ian