In this tutorial I will show you how to make a fully functioning quite powerful crossbow. this crossbow has the capabilities of shooting sharpened lengths of dowel over 20m. do not point at anyone or use this inappropriately.
Step 1: Shaping the stock
firstly you must design the outline of the stock used for the main handle of the crossbow. once you have designed the outline, draw it onto the wood and carefully cut around the outside of the line with the jig saw cutter I have used two sheets of 19mm ply (as this was the only material I had available at the time) and screwed them together.
Step 2: Crossbow prod
the prod is the part at the front of the bow that stores the energy in the timber limbs when the string is pulled back. this is made from a flexible 5mm craft wood that I purchased from the local timber seller. I have cut the strips of wood into 3 different sizes, the cutting list is as follows:
2 @ 500mm
2 @ 350mm
2 @ 200mm
the prod is tapered outward so that the smaller lengths are on the inside and the longer lengths are at the back this helps when it comes to storing energy and efficiency of energy transfer to the arrow (bolt).
with the stock cut out and shaped I have cut a square hole at the front of the stock which the prod can simply slide through, now pre-drilling a hole through the end of the stock and through the centre of the prod, this allowing us now to drive a screw that will hold the prod in place.