Aerodynamic Drag Measurement and Modeling for Small Arms - Improving on Ballistic Coefficients

[DocBeech]

This article help you better understand G Form Factors, and why these days they are outdated and we have better systems in place for more accurate predictions. I hope you enjoy.

https://appliedballisticsllc.com/wp-content/uploads/2021/06/Aerodynamic-Drag-Measurement-and-Modeling-for-Small-Arms-Improving-on-Ballistic-Coefficients.pdf

 

[DACMagic]

I've always wondered why they measure ballistic coefficient instead of somehow mapping the bullet cross-sectional profile along the axis of travel. I assume you could have a "optimum" bullet profile for a given bullet mass (lead, with a standard jacket thickness) with the least amount of drag and boundary layer separation? Like a optimized bullet shape?

Using the optimum profile on one end of the spectrum, and a plain cylinder on the other end, you could map how "good" your bullet performs based on the "best" and the "worst" in terms of air drag. It seems like this could eliminate a lot of the atmospheric variables, but I guess you'd have manufacturers playing games with the bullet density to skew the numbers...

Anyway....good info on the ballistic coefficients and their measurement ranges!

 

[Gordo]

On cars with bad drag coefficients, You just need to make more power...

 

[DocBeech]

On cars with bad drag coefficients, You just need to make more power...

Look up burn bass or bleed base projectiles.

 

[Gordo]

Yup, seen those in a thread on Ukraine munitions.
Just don't know how to apply that technology to my Toyota...

 

[DocBeech]

** Snip**

Have you tried sparklers? Even though they only allow sales 6 days out of the year...

 

[Gordo]

Nope, it's a Toyota, not a chevy...

 

[Lonesome Dove]

As long as I can see or hear the smack when it hits my target nothing else matters to me. I've learned it's path already and it's always an arch. I'm good with it.