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#81
Ballistics / Re: Weapon Employment Zone
Last post by 375CT - June 14, 2014, 05:08:57 PM
Quote from: admin on June 12, 2014, 01:38:37 PM
Maybe "Monte Carlo" is a  definition issue. In this case, i imagined that input parameters are generated in such a way that they are consistent with a certain probability distribution. Then a trajectory calculated and evaluated. The process is repeated hundreds of times. This is what one might describe as Monte Carlo.

Nice reply, much clear now. Will take a look to your workbook and for sure coming back with more questions, if you don't mind  :)
#82
Ballistics / Re: Weapon Employment Zone
Last post by admin - June 12, 2014, 01:38:37 PM
Maybe "Monte Carlo" is a  definition issue. In this case, i imagined that input parameters are generated in such a way that they are consistent with a certain probability distribution. Then a trajectory calculated and evaluated. The process is repeated hundreds of times. This is what one might describe as Monte Carlo.


#83
Ballistics / Re: Weapon Employment Zone
Last post by 375CT - June 11, 2014, 07:32:53 PM
Quote from: admin on June 11, 2014, 01:16:00 AM
WEZ is a Monte Carlo simulation.

I find it hard to opinate about it - it does what it says.

Quite frequently I use a similar tool understand ballistic effects in a target shoot competition setting.

It is available as download on the BfX site. Look for the descriptive text:

"This workbook hosts a simulator with which you can estimate your results in a (multi distance, multi target) match, e.g. the NRA 90 shot full bore regional match course."

Robert,

Thanks for the answer, however how do you know WEZ is based off of Montecarlo? I've read all the available literature by Litz and that word is not present even once.

thanks!
#84
Ballistics / Re: Weapon Employment Zone
Last post by admin - June 11, 2014, 01:16:00 AM
WEZ is a Monte Carlo simulation.

I find it hard to opinate about it - it does what it says.

Quite frequently I use a similar tool understand ballistic effects in a target shoot competition setting.

It is available as download on the BfX site. Look for the descriptive text:

"This workbook hosts a simulator with which you can estimate your results in a (multi distance, multi target) match, e.g. the NRA 90 shot full bore regional match course."
#85
Ballistics / Weapon Employment Zone
Last post by 375CT - June 06, 2014, 12:17:55 AM
Hi there,

I'd assume most have read about the WEZ analysis Litz is now including as a feature in its PC software.

Would like to hear about opinions on its value as "hit probability" tool, if it's such, and mostly about the math behind it, if it makes sense. So far, I was only aware of Montecarlo simulations but apparently this feaure is not based off of it.

Any comments are greatly appreciated.
#86
Member projects / Re: Ballistic_XLR a modificati...
Last post by meccastreisand - May 31, 2014, 06:15:28 PM
The latest version has quite a lot of bug fixes and tweaks and improvements.

https://drive.google.com/folderview?id=0B2_BBw2VMf2-VUJZNXVTM0M1akE&usp=sharing

#88
Member projects / Re: CFD modelling
Last post by admin - May 24, 2014, 08:28:27 PM
cool!

what I need are parametrizations of 6dof coefficients for boat tail bullets. No other projectiles.
#89
Member projects / CFD modelling
Last post by mman - May 06, 2014, 07:02:24 PM
Just a little teaser about what I'm currently working on.



I've been studying CFD about a year now and due to my work I have access to CFD programs. At the moment results are promising. Errors in Cd are less than 5 %.
#90
Ballistics / Re: Vertical Deflection due to...
Last post by 375CT - May 05, 2014, 06:51:19 AM
Nice replie, thanks for them.

Now, I agree there are some holes in the paper, but compared to what Litz is offering in terms of addressing the AJ, I think the outline is way better in many aspects. Will take a new in depth read to see if I can understand it better.

In my opinion, AJ due to crosswind alone is a tricky one, and this formulation makes more sense to me than the one presented by Litz.

Further comments are welcome of course. ;)