So, when I started my introduction thread I asked which forum would be best to ask questions about making a slingshot crossbow, and I was told that the general forum was fine. If I made this topic in the wrong place, please move it. Because I have so many questions about designing a slingshot crossbow I decided to divide my questions into 2 topics: 1 on the physics/limits/potential of Theraband (mostly on theraband gold), and the other on designing a slingshot crossbow in terms of body design, materials to use, etc.<br><br>Questions on how to design a slingshot crossbow:<br><br>For his bands, Joerg says he likes the "clamp method", and has mentioned this both in a review of a slingshot and in the video showing his bullpup slingshot. I would like to make mine with a clamp as well. How would I go about doing this? (I do not have any tools to cut or shape metal) <br>1. Would the only requirement to be to attach a piece of wood or metal to the body of the crossbow and attach it with nuts and bolts to tighten/loosen it, or is there a specific way?<br><br>2. In my introduction topic someone mentioned using fairleads to tie string. Would they be useful for tying bands?<br><br>My next questions are about wood:<br>3. What sort of wood do you recommend for the body of a slingshot crossbow?<br><br>4. Joerg seems to use just normal wooden boards for his bullpup/blunderbuss slingshots, do these materials handle high band tension well?<br><br>5. Has anyone used a different kind of wood, like lumber (such as 2x4's) and is it any stronger than wooden boards?<br><br>6. If I end up using wooden boards/ 2x4 lumber to make the crossbow, would it be worth the effort to sand/stain/use some form of preserving coating on the wood, or is the material not worth the effort?<br><br>7. If so, what kind of coating should I put on it to preserve it? (I have looked at how to sand the wood on other topics so no need to repeat how to do it)<br><br>My next set of questions is about trigger design. I am planning to use the same trigger type as the one used for Joerg's blunderbuss slingshot, where the band pushes against the front of the release hook, causing it to lower and catch the band. You can see a picture of it on the first page of the blunderbuss topic several posts down. I wanted to ask:<br>8. The trigger seems to be cut from a wooden board and does not seem to be very thick. I am concerned about making a trigger of the same design, and so I am wondering, what is the best way to reinforce it so that the hook will not break under high tension?<br><br>9. The picture Joerg took of the trigger mechanism is too small for me to determine what he used for the axle on the trigger, what should I use?<br><br>Lastly I need to ask about the relationship between the bands and the body of the crossbow:<br>10. I plan to make the crossbow with pulleys to hold the slack band, (like on the bullpup crossbow and arm mounted crossbow), how wide should the bands be at most?<br><br>11. Should I use any sort of tapering on the bands?<br><br>12. How deep should I make the channel on the shaft of the crossbow? I know it is likely more specific to the size of the ammo I am shooting, so let us say theoretically I am shooting either balls with a diameter of 1/2 and inch or arrows/bolts with a shaft diameter of 1/2 an inch. How deep should the channel be for holding that kind of ammo?<br><br>13. Because the bands need to be able to pull the projectile across the shaft, they need to be close to the channel walls on the shaft. However, I do not want to have them drag against the shaft with every shot because I am concerned about adding wear on the edges of the band. could this issue be solved by making the pouch tall enough to fit inside the channel?<br><br>14. If I were to make the channel on the shaft wider than the projectile I normally plan to use will this adversely affect accuracy? Should the channel be designed to fit the normal sized projectile only?<br><br>15. If I were to cut the channel in the shaft such that instead of being rounded it has walls at a 45 degree angle and a flat bottom, would this be less accurate than a rounded channel?<br><br>If you have any ideas for how to make a trigger safety I would appreciate hearing about that as well.