That puts at about thr+2 to thr+3 for ST 12, about where GURPS puts the pistol crossbow. 55% of that is 4.1 points, or about 1d to 1d+1. A weapons-grade crossbow from The Basic Set that is ST 12 will do 1d+3 damage, or about 7.5 points. The energy you’ll get out of equivalent draw length but less force will be quite a bit less, corresponding to a damage of 50-56% of the full-power bows assuming a draw strength of 8xBL. Still, the crossbows that do thr+4 imp are the 8xBL ones. Let’s give it the benefit of the doubt and say between 2x and 2.5xBL. I’m inclined to say between 1xBL (seems light) and 2.5xBL (seems heavy). The pump-action will brace against the shoulder, but it’s pretty much a one-handed pull with one arm, if the second hand remains in “trigger” position and you’re bracing the weapon at the shoulder the entire time. 1.The arrow groove, in which several branches of arrows can be placed and an inverted-L string slot was in the end, is the core feature of the crossbow. You get a lot of back and shoulder in it, though. A bow can use the legs (see my longbow draw movie – it’s not great form, but it’s more than just the arms and back. The Chinese repeating crossbow was a masterpiece of functional design, made entirely from bamboo and other wood. Can we eke out the same 2.5xBL as a bow? Probably not. B353), how heavy a draw might one manage?Ĭertainly not 8xBL. So if the lifting part is 8xBL in 2 seconds, and a bow is up to 2.5xBL in one second (slightly generous over the 2xBL from p. A bow is ready an arrow, mate the arrow to the bow and draw, shoot. This seems to be “ready the crossbow in two seconds, ready a bolt, put the bolt on the crossbow,” and shoot on the fifth turn. That means that you can span a crossbow of up to 8xBL using two hands and bracing the thing on the ground – equivalent to a Two-Handed Lift from p. But let’s assume that the work I did in The Deadly Spring wasn’t totally bogus. The Basic Set and Low-Tech crossbows leave quite a bit to be desired from a verisimilitude perspective. So that leaves the draw weight of the thing. Still, let’s say that we can neglect draw length or power stroke. Medieval crossbows were shorter strokes, mostly – the powerful ones had steel limbs that didn’t flex much, and so might be hundreds of pounds – or even thousands – with only 6-9″ of stroke. Modern crossbows have a power stroke of 9.5 to 13″ so you’re not really losing much there. Well, compared to a regular crossbow – especially one with modern materials, you’re probably still looking at a draw length on the order of 7-11″ and not too much more. The design on the thread was a fairly standard design, nothing quite as elaborate as the image to the right. Once again, over on the forums there’s a thread. In this case, someone created a repeating crossbow that is re-loaded using a pump-action similar to a shotgun.
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