Upon further reflection, it could be argued (depending on your interpretation) that the zwerchau used as a meisterhau is not intnded to counter a zornhau, but rather a vertical downward oberhau from vom tag.
Hi Joel, from Ringecks work;
"The Zwerchhau counters (literally "breaks") all downward strikes made from above. Do it like this: If he strikes an Oberhau at your head, "jump" (make a large, explosive step) to his left side with your right foot, while you jump, turn your sword, so that your hilt is high in front of your head and your thumb is down (on the flat of the blade) and strike at his left side with your short edge. So you catch his strike with your hilt and hit him simultaneously on the head."
To me, "all downward strikes made from above" certainly includes zornhau, the most likely strike from above. it's also obvious from the text that you are zwerching in response to his oberhau.
I note that I consistantly have no problem displacing Rods,(or Matts, Cathy's, Bills etc.) Zorn with a zwerch at speed, but When Rod and I worked it at speed with the padded weapons after some half-speed work with wasters, he was engaging my forte with his own and therefore a hard bind was achieved. To compensate, Rod simply twitched a zwerch to the off side as he would do in bouting.
It seems to me that my height and long reach is actually crowding his counter-zwerch as he strikes for my head, and geometry being what it is, my full-power zorn strikes his full-speed zwerch on the strong as his hands are out and up to cover his head with the hilt and my own hands are stretched straight out to make the zorn. It's hard to explain but easily shown as he has to come close enough to strike my head, yet that closeness earns him my forte instead of my mid or weak. We will have to experiment with more extreme lateral movement on his part however, that may possibly help a bit if he is able to spring in and over into my cut fast enough to catch my blow before it is even half developed...but that aint easy, I'm not too terribly sluggish in delivery. <img src="/forum/images/icons/wink.gif" alt="" /> <img src="/forum/images/icons/grin.gif" alt="" />
I trust that all of you shorter fencers that have commented have tried this at full speed against a guy of much greater height? That does make a difference as it causes your opponent to have a more fully generated blow than he would have at lower speeds due to reaction time on your part. That will cause you to be more "crowded" at delivery as is occurring in Rod's case I believe as he does it fine at less than full speed and he likewise does it fine at full speed against lesser stature as the geometry changes a bit.