Hello
Alright first off, I have to do my due diligence:
Read this PSA to new forum users v2
TL;DR Don’t ask the forum for ideas
Give a man a fish, feed him for a day, teach a man to fish, feed him for a lifetime.
For design ideas which involve a passive hang, I can think of two things that you might want to do. If you have a catapult, you can do an ace style hang off of the catapult. Note: you would need a catapult ratchet for this to work effectively. The alternative would be to do the same thing, but keep it up the whole time and use rubber banding. I can elaborate if you would like. This comes with the caveat that you can only drive one way under the barrier.