Absolutely! The weight basket was designed around the US penny, but the Pennypult can definitely accommodate other coins within certain specifications. Our recommendation is to keep the coin or cylindrical object under 20.5mm in diameter, and a similar weight to that of 16 US pennies. Each US penny weighs approximately 2.5g which puts the target weight around 40g. The weight basket, however, is designed to have a max width of 24.32mm.
If are using Euros, for example, our best recommendation would be to utilize the 2 cent coin. Given the weight and thickness of the coin, thirteen 2 cent coins will have you at 18.75mm in diameter, 39.78g in weight, and 21.71mm in thickness. If you are using a British penny, 11 or 12 will have you at 20.3mm in diameter, 39.16/42.72g in weight, and 16.72/18.24mm in thickness.
If you have further questions about this subject, maybe specific to where you reside, feel free to message us for recommendations!
Unlike a traditional trebuchet, the Pennypult is actually a sling-less design! All kits come with 5 projectiles that rest between the weight basket and the arm (set on the arm hook). The sling-less design proved to be much more reliable and easier to load - with no sacrifices in performance. More detail available on our Updates called, "How to: Load + Launch". Be sure to check it out!
Don't see the answer to your question? Ask the project creator directly.