quaraga wrote:sounds like some science is nesesary, how about you get a weight, a few catapults, a universal projectile, and a yard/meter stick. then applying only the weight of the weight measure how far the projectile goes.
What logical thinking. I took your advice, and measured the two catapults that I actually do have. These were from set numbers 6030 and 6193. I made a 2 ounce weight out of a lump of modelling clay wrapped in aluminum foil. I lined up a couple of yardsticks from the fulcrum of each catapult and dropped the weight from a height of 12 inches -- using a single 1x1 cylindrical brick for ammunition. It wasn't easy to get particularly consistent results, so I took the average of the five longest shots. Here are the results.
#6030: 50 inches.
#6193: 62 inches.
Since 6193 was so easy to adjust, I moved the lever arm back one notch (from what is shown in the official instructions), and this increased the range to 70 inches. But I didn't attempt to make the same adjustment for 6030. I still think it would be interesting to compare results if anyone else has any other catapults they could test.