Well real combat, no not quite, but again France is not at war so.
To answer you question yes I have broken/strained a few things on people (outside training that it) during my life. (And got few thing seriously strained as well, but well you can not win them all).
And yes I personally know people who broke people with “that”. (In fact, I believe that the tokyo riot police currently does).
But that does not really proves anything does it?
A little bit like buggery or shooting oneself in the foot, one do not need to do it to understand that it is going to hurt and where.
I train 3 times a week, in aikido and for what it is worth I am shodan.
I have given and receive over five years of kote geishi and shihonague.
Those two technique work on the same principle which I believe is the same as that throw and the same as in Ringeck arm break. (and in the Ringeck wrestling at the sword)
The only difference is kote gishi is more like to get your wrist or your shoulder and shihonague your elbow and yes in akido you apply theme so that you can gratefully ukemi out of them.
I understand you have done that technique hard against some one and you believe it is bind. And you probably train as hard if not harder than I do, and possibly you hold a higher grade than I do in you respective art.(which I believe is probably BJJ/MMA related) and I can really accept that from your own experience it can really only be a pin.
I can understand that you are sceptical, However the text tells us that this is a blooming break, and believe that we can break the arm from there.
No we can have a “Oy, you split my pint”and see who can piss the further on the forum or more if affinities or take that in a more gentlemanly fashion.
if so would you mind try the following:
It is just to show what cause the breack, it is not really the technique per say.
Your partner has to be relax ad go with you.
Have you partner extand his hand open as if he was going to shake a hand. (lest use the right)
Place yourself at facing 90 degree outside his centre line at arm length on the side where he has extended his hand all that at the level of his hand.
Ie you are facing the back of his extend hand)
Take his extended wrist with your left hand, the grip is from above with the thmb at between the wrist bone of his annular and his pinkie’
Bring back your elbow to your body and rotate your left hand so that your thumb become vertical (you partne should realing his centreline from 90 to 45 roward yours (you haven moved yet)
You have taken the slack out his fore arm. In other way you have rotated his elbow close to it maximum rotation point
No being you left hand to your side with changing the orientation of you grip (that will stretch his arm and remove more slak, so stop when he still has a bit of slak)
Now pass with the right foot and grab his right hand (the same we have since the beginning) with you right hand this is a reverse grip (ie with the thumb down) you grip just over the thumb of your left hand.
Make sure that your right elbow his close to your side. And press hi hand toward the direction of hi back slowly.
He should be able to break fall from that.
Now if you do the same thing with your right elbow under his, then you press his hand backward as before but away from his body you have taken away the possibility he has to break fall (well he can still goes over the top be well) and all the stress will be on his wrist in that case.
But if with you right had using the same grip you will grab the arm instead of the hand and rotate you will break the elbow (or straight or dislocate it).
so basically the less we support the elbow the more we thow and the more we support the elbow the move the break.
I am sorry if I explained you how to suck eggs but this is this type of break the we can achieve from the grip in the picture.
(ie this is the same type of stress on the articulation the forces are different. The example I use is the 4th bone break of ringeck or a mixt between kote gaishi and shihonague).
hopefully, that should clarify what i meant
“Phoney”phil

One Ringeck to bring them all In the Land of Windsor where phlip phlop live.