jaysgoh Posted September 1, 2014 Share Posted September 1, 2014 May I know what size of ball should I use to make 4 inch? I knew 3 inch used tennis ball but 4 inch I got no idea and I can't search any tutorial at YouTube and Google. Thanks Link to comment Share on other sites More sharing options...
schroedinger Posted September 1, 2014 Share Posted September 1, 2014 Did you have a look at nighthawkinlight's channel? He uses ab base ball Link to comment Share on other sites More sharing options...
jaysgoh Posted September 2, 2014 Author Share Posted September 2, 2014 I did, he is doing for 5 inch shells hemisphere.. I only can find 4 inch hdpe, so I looking on any kind of softball or similar size. MMay I know around what size of the ball should I find? Like 3.8inch? Or Link to comment Share on other sites More sharing options...
Zumber Posted September 2, 2014 Share Posted September 2, 2014 (edited) do you have access of kids plastic balls??if yes you can make mold from it pouring white cement in it. http://www.amateurpyro.com/forums/topic/9955-my-first-6-inch-plastic-shell/ Edited September 2, 2014 by swapnilsutar1988 Link to comment Share on other sites More sharing options...
Mumbles Posted September 2, 2014 Share Posted September 2, 2014 I moved the thread since this in no way, shape, or form resembles a tutorial. More like a spoon feeding. I only watched about 30 seconds of that video, but if he's using a softball, it's not a standard one. For a 5" shell, you'd need a 14" softball, which are not overly common though available. For a 4" shell, an 11" softball might be suitable. 11" softballs have a diameter of about 3.5", so after build up of the hemi walls, and then subsequent pasting in of the finished shell, it should be about the right size. A 12" softball has a diameter of about 3.8", which would probably end up too tight. Link to comment Share on other sites More sharing options...
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