Ballistic V50, done properly.
Fit your firing-session shot data, estimate V50 with confidence limits, and check the method's conditions — all from a focused desktop app for body-armour and ballistic-protection testing by the probit method of NATO AEP-2920, Annex H.
From shot data to a defensible V50
Enter your firing-session results and let the software handle the statistics.
Probit V50 fit
Maximum-likelihood fit of the perforation model to your shot data — impact velocity plus a complete- or partial-penetration result — per AEP-2920, Annex H.
V50 · V1 · V99
V50 and its standard deviation, plus the V1 and V99 velocities, each reported with 95% confidence intervals.
Method conditions
An automatic PASS/FAIL check of the firing-session acceptance rules: mixed zone, shot count, and the CI-width stop rule.
Confidence limits
Profile-likelihood confidence intervals on both V50 and the standard deviation, computed the way the standard prescribes.
S-curve you can publish
The perforation-probability curve with your data points, V1/V99 markers and confidence band, exported as PDF or PNG.
Reports & export
One-click PDF report plus PNG, CSV and Excel output — with your panel/coupon ID, RFQ and operator on every page.
Runs on your machine
A native Windows app — your test data never leaves your computer.
Traceable to the standard
Reproduces the AEP-2920 Annex H worked example — V50 = 515.2005, sd = 10.9791.
Try before you buy
A free trial to evaluate it on your own firing data, no commitment.
Ready to try it?
Download the free trial and run it against your own firing-session data.