I think that we generally agree on this matter. But I'll write some more,
not because I think you are wrong; just because people tend to remember one
simple message even if topic is very complicated.
If one single message must remain from our discussion, I'd like it to be that
typical armor as worn in the longbow era did not protect against arrows
perfectly.
So bear with me, just for a moment more.
In the armour one, it was a slack quenched face-hardened Milanese
cuirass and it only punctured the cuirass (i.e. no damage to the man in
it).
Right. But as I understand the physics of penetration, once a plate is
punctured a weight of an arrow becomes a deciding factor. Light arrows will
not be able to penetrate deeply. They used light arrow, as far as we
understand it; ergo, they did not test how much damage a man in that armor
could sustain. Plate was punctured, though.
I am not sure what heat treatment the transitional armour had not to
mention the mail nor what the arrow head was made of.
I'm not sure if heat treatment is so crucial, after all. It seems that
arrows "prefer" brittle hard steel over soft pliable one. Deforming steel
sucks up energy of an arrow and often proves to be more difficult to puncture.
What I was trying to say with my example is that cheap modern armour
is not a good representative of what armour really is.
It does not matter what armor is, it matters what it
was.
I remember one estimation made by some Polish historian which estimated the
cost of full kit of a horseman to be roughly equal to providing enough
calories to sustain 400 people for 100 days. It is a lot of money! Many
guys probably cut some corners when they had to.
OK. Some images showing what heavy war-bow can do to supposedly very strong
target. Those guys who posted those pictures try to show, that even
extremely strong longbow will not go through it. Whatever. See for yourself
and judge accordingly.


Regards.
Here is the story behind pictures.
http://www.clickersarchery.co.uk/online/pages/danage.php