I was refrancing the hammer hung as an actuator and lever... that screams all bad too me.
But looks cool. But yeah its a pendulem fully loaded resdy to drop its load and lock it up on its own.
There is no reason it would not work the return is the issue. Thats also not hard to solve, ud need build a cage to limit the throw of the arm and to know it reseated the hub where it started from tension wise. In theory yes using the arm is same as the cog side...
Other issue i see is now youd secure the axle to the drops. I tend to seat the wheel and chain first then tension the brake.
But ive had hubs fail because the arm got loose and opend up enough to stop the coster from working.
I dont know bud its totally feasable i just dont know the benifits merrit the work. It would not be very noticable as a mod, so i guess there is some cool factor to that also.
I do think there is valid concern with leverage... we already double power from the sprokets... that could be compinsated by pullys as well
Can be done, is a neat idea, not sure the reward is there from the trouble. Beyond some pride and being stubben.. but not to worry, i find myself there often.