>>13297040Get a light weight grappling hook it could be fired like a gun. You could also use overrated fishing line instead of rope. The most impossible part isn't the grappling, it is the line wind up. It is powered by ICE engine. So it has to have enough power to pull your bodyweight directly against gravity with good acceleration. So a 80 kilo man minimally moving 1.5x gravity results in approximately 800N or 8000J to move ten meters in approximately 2 seconds yielding something like 5 hp. Given the efficiency of the engine, which will obviously have to be diesel and not gas, you might get 33% efficiency in overly ideal conditions, so that is a 15hp engine. Something like an additional 30 kilos. Which is weight to be factored in and results in a bigger engine.
The engine could be carried like a backpack but it will be something the size of a golf cart or outboard engine. There are technical feats required to deliver line built into the catapult bullet to the motor pulley harkening back to the days of cable driven seekers. 3 kilos for the gallon of diesel might last an hour.
Sure, you could give the engines to exclusively small women or children and decrease its size, but the greatest factor is reducing line tension, or acceleration of the motor. This seems technically fine in an anime where they randomly build up momentum safely, but it becomes a suicide machine. Failure modes, most of which involve operator missing a target, result in grievous injury or death. Regular failure modes from faulty equipment, result in grievous injury or death. Redundancy can be laid into the bullets using two lines and an associated mechanism in the driven wench. Operator error can be reduced using magic AI for targeting. But then it starts looking like we are building a tachikoma, which is a significantly more reasonable application of this technology.
