Recent content by SSKscioly

Hi @hutchphd , @erobz , I am able to solve the long range issue. I changed the connectors from the tower to the barrel to 2 inch ones ( they were 1.5 inch before) , the projectile now shoots 8m. I am dropping the 3 kg weight from the height of 24 inches in to the 4 inch tower with no holes. The...

Thank you hutchphd, I am going to work on collecting the data over the weekend.

42.41 cubic inches

24 inches

Hi @ erobz , The total volume of the barrel is 301.59 cubic inches ( 24 inches height and 4 inch diameter) The sealed chamber is 9 inches down from where the holes to the top of the weight when it is dropped , so if I am calculating correctly, my internal working volume is 113.10 cubic inches

Hi @erobz,@hutchphd , I am totally lost. No matter what i did, sanded smooth inside, added lubrication, changed the angle of the barrel, I am not able to shoot past 6 meters now. This is how it looks now before attaching the barrel. You think this design may not work for what I am trying to...

Sorry, I tried uploading the video and it is too big.. I drilled 30 holes all around the tube. and above 12 inches from where the weight drops to the bottom

I drilled the holes and now the ball shoots around 5.5 meters. Do I need to drill more holes?

Thank you @hutchphd and @erobz for the guidance. I will try drilling holes and will test tonight.

The only rule in regards to the height is the whole device has to fit in 75 x 75 cm cube. I purchased the lead puck that weighs 5 lbs and 3.5 inch in diameter. I used the tape to make it as air tight as possible to match the diameter of the 4 inch drop tower. I put the 4 inch drop tower pipe on...

Hi Lnewqban, Thanks you so much for responding. I sealed the joints of the barrel and the drop tower with the pvc cement so there are no air leaks. i guess this is where I am getting confused on what it can be. How can I get the labyrinth seal on a lead puck?

Hi Hutchphd, please excuse my illustration. I placed a wood block at the bottom where the mass falls, so it wouldn't hit the floor (highlighted in blue in the attached picture). The weight(highlighted in red) falls exactly near the elbow and covers the hole of the elbow by 3/4 once it is at the...

Thanks Kuruman, the ping pong ball diameter is 40 mm and when the ball is dropped in the barrel it is pretty snug at the elbow. It does take a little force if i need to wiggle it out but once the mass is dropped, it shoots freely. That's why I'm confused on why it isn't able to shoot that far...

Hi Kuruman, Thank you so much for responding Sorry for not clearly mentioning. The near and far targets can be placed anywhere between 2 and 8 meters. That means the far target can be at 8m. We would not know the targets until right before the competition. So, the goal is for the projectile to...

TL;DR Summary: Hi, I am a high schooler competing in a science competition building a trajectory to shoot the projectile similar to the one in the thread below. https://www.physicsforums.com/threads/aarons-gravitational-potential-energy-to-launch-projectile-science-competition.773745/ The 4...