Penetration data 30 or 90?

[Zhukov]

Well I dont pretend to be an expert on armor and while I am working on my map/mod it dawned( I m not too bright -lol) on me that I had to make new penetration data information for the peticular tank in question so I pose my noobish uninformed question to the community which would be the best numbers to use penetration numbers at 30 or 90?

[Sichartshofen]

Use data at 90 degrees. The RO penetration tables don't take angles into account.

[Zhukov]

Thanks, although I am finding penetration data at 90 degrees to be pretty scarce.

[Boogerhead]

I found a table here:
http://www.achtungpanzer.com/pz3.htm

This was my Google search:
Panzergranate 39 penetration 90 degrees

You might be able to find data for your rounds in question with a similar search, albeit you probably need to abbreviate panzergranate.

[[TW]Wilsonam]

Guns vs Armor is a pretty good site - also, you can run a theoretical calc for the diff between 30 and perpendicular - it gives you a reasonable approximation...

[Amizaur]

If you dont' have good and reliable data for 0deg (vertical), take data for 30deg (30deg from VERTICAL, not horizontal which would mean 60deg), data for 30deg from vertical is the usual standard. Then multiple it by about 1.25 and you have good approximation of 0deg penetration. (Note that this isn't a simple cosine, which would give multipler of 1.15 for 30deg angle). Function is little more complicated and 1.20-1.25 for 30deg is closer to reality.

P.S. RO seems to use a little weird coefficient of 1.72 for a 30deg hit... :-/

The data from the link posted above, is good example of an NOT reliable 90deg penetration data. Notice that this "90deg" data is somewhat identical to 30deg data from the bottom of the page. So at least one of them is wrong. I believe it's the yellow one. It's probably mixed 90deg and 30deg data. The data from the lower tables is of better quality.