James Hobson (The Hacksmith) has created an electromagnet arm bracer which allows him to attach and detach the Captain America shield replica to his arm.
The lithium-polymer batteries produces over 3000lbs of magnetic lifting force together thus making it powerful enough to lift steel frames and throw the aluminum Captain America shield across. (Shield made by MachinaProps).
Check out the video below to see the awesome arm bracer and shield in action. More testing with the shield will be shown in their next video.
For more details read their blog post here.
We made this awesome electromagnet arm bracer for the Replica Captain America shield, just in time for Captain America: Civil War. It uses a set of lithium-polymer batteries from Hobby King running in series at 72V. This produces 720kg of magnetic force at each electromagnet. That's over 3000lbs of magnetic lifting force together!
The electromagnets are available on Amazon, and are rated for 12V, which produces ~120kg (1200N) of lifting force. We're running them at a much higher voltage for short periods of time to create awesome power. They will overheat if you use them for over a minute at this power level!