Ok, honestly, I’ll pick this project back up soon but check out this picture from a book my friend gave me for Christmas. Is that not the coolest thing ever?
It’s from Richard Middleton’s outstanding The Practical Guide to Man-Powered Bullets: Catapults, Crossbows, Blowguns, Bullet-Bows and Airguns. If you are at all into this kind of thing—by which I mean hand powered shooty things—then you really ought to finagle a copy of this book right away. Middleton details the designs of several amazing contraptions, offers build tips for several projects and does the math on everything from draw weight to drag coefficients. Seriously: a must have book.