Hello, last weekend I was a the „Rock am Ring“ music festival. There ware also a few guys having these slingshot: Big (this is the smaller version: Small) These thing was really cool! It had much power and a gigantic range!! I needed some time to figure out, where the water balloons where coming from …. The only problem is, that you can't aim unless you are going for a strait target. I thought about a slingshot which can be fired like, a mortar. It is necessary to set the direction, angle and energy, to close up to your target and repeat a single shot any time you want! My first idea was to use a slingbow like type. Direction is quite easy, you can just mount an compass on the device for this. Energy can be managed by using balloons with the same amount of water (weight) and a trigger which shout give us the same power from the rubber (Temperature can make problems). Angle has to be done by moving the front up-worts for an measured length. It is important, that you can measure every setting and note it down. So you are able to remove the device, bring it back and do the same shot again! I have some ideas how to build something like that, but it should be small, light, easy to carry and maybe not looking to dangerous. So, because I am not experienced (I haven't build a single slingshot [since I was a child]), I ask you experts here, what do you think? Which design should work best? Is it an intelligent idea to build something like that? / Could it be to dangerous? Have someone maybe already build something like that? In my opinion it could be a cool project for the summer, not only for me btw.: Sry for my poor English, I read books and watch movies , but don't write it often.