pic: 1678's 2014 Robot - Beca

[quantcyg]

Originally Posted by Jordans16117

if possible could you guys post the way you adjusted your shooter tension?

We didn't have a precise way of adjusting speargun tubing tension; rather, we added or removed wraps as we thought necessary as we calibrated the shot. (I believe we ended up with about 100 pounds of force as measured at the top of the catapult in the fully cocked position.)

However, we could adjust the catapult throw by changing adjusting a nylon strap attached at one end to the top of the catapult arms and at the other to a bearing sled that moved along slots in the main catapult frame. We could also move the spiral cam's distance from the shaft that it pushed on to change the overall crank-back of the launcher. Adjustable fingers managed fine shot tuning.