-- Let me describe the idea. In some types of terrain, such as a city, there is sometimes a need to shift the battle from a horizontal plane to a vertical one. Of course, when defending, nothing prevents you from stringing ropes for the same purpose, or even simpler – just digging in somewhere. But when attacking... The situation is different.
-- According to the classics, the problem of enemy fortifications can be solved with explosives. You can also throw a rope, but then you will have to climb it for a long time with your own strength. But if, if you install an engine that will pull a person up the rope... Then the process becomes much faster and more practical. An automatic grappling hook.
-- Of course, there is a problem that a person is a heavy load, and an engine from ordinary swords will not work... If you install a higher gear ratio to increase the force, you will have to sacrifice speed. And vice versa, more speed – less force. You need something more powerful... But, seeing that you still managed to create a flying device, I think you have a solution?
-- By the way, I made the hook a little wrong. I was in a hurry. It should have had three teeth. But the general principle...