I did a video comparing Roland Warzeca's Historical researched Cast blow with Viking age and Migration period sword designs to my concept of the Overarm throwing slide with one handed spear. The techniques are very similar in generating power from weapon acceleration and extreme power at that. If anyone has references to these techniques historically through ancient text depictions art work or even modern surviving combat forms that or historical based please post here.
Here is the Video of my test cutting and thrust comparing these too reconstructed techniques That I and Roland believe were commonly used historically.

Roland Warzecha's Cast Blow Sword Technique Similar to Thrand's Overarm Slide Spear Technique?
https://youtu.be/y8tmoTu_8AA

Has any one else tested these techniques or have references to their use historically?

Hey Thrand. Here's a link to an old thread that you might find interesting

http://www.myArmoury.com/talk/viewtopic.php?t=2478

This is not really new. There is pictorial evidence, some of which you showed yourself in your video.

It is, however, only part of the story. We know from later sources that you change your grip constantly when using a sword. This is equally true for one handed swords as for swords gripped with both hands.

Unfortunately we don't have any Fechtbücher for the early middle ages when these swords would have been in use.
So we really don't know how they used it, all we can make are educated guesses.

I think that this way of holding the sword and "throwing" a strike was done but it was only one of the many ways it was gripped and used, as in later periods.

But it is good to have at lease one, isn't it.