Originally Posted by
monkeyishi
so found some replays that may fit here.
first one is against a no grabber so that may change it.
it seems it works with out the shoulder down as well. i have a few decaps without the shoulder down.
i think it helps with decaps to have the shoulder down then you get a ripping and a sheering motion going. i'll keep looking and see what else i can find
If you're refering to the Uke having the shoulder down then yes thats a strong indicator that theres an opening for a power cross.
The power cross IS a no grab on the punching hand so your first replay was perfect! Your upperbody form was nearly identical while the lower body was reversed.
I also noticed in your replays that many of your base-leg knees and ankles were relaxed or held which tells me they aren't critical to the punching power.
So heres a few conclusions i would make for the power cross
1. Punching power is generated primarily in the upperbody.
-Both pecs contracted
-Both shoulders raised
-Punching elbow & wrist extened
-Gripping elbow contracted
2. The base leg can be on the same or opposite side as the punching hand.
-Hip extended
-Glute contracted