500 Yard Golf Ball Launcher / Cannon

This launcher took about 3 days to build including the machined inserts and modifying the valves. I fired 6 initial test shots and I was able to locate 4 of them. Using a GPS my shortest ball was 492 yards and the furthest was 525 yards. I don't think that ball roll at the end made a very big impact on distance. I have about $300 into it but as I stated in the video if you use schedule 40 PVC you are begging to be a Darwin Award recipient.