I built a launcher some years back with a one price pipe. I cut a groove into the pipe for the o ring to seat. I think I use 3/4 inch pvc. And now my o ring had final failed do to age. And I can't for the life of me remember what size o ring I used when I built it. I do know that it only works with Pepsi bottles, not coke because the coke bottles are to tight. It has a Clark cable tie release on it. I real don't want to have to cut the launch tube in half to put a ring on. I just need to know what size I can slide down the tube to the groove to seal the bottle. I live in the middle of no where and will have to order one because the closet stores are 2hrs away. So any help would be greatly appreciated.
Need help with o ring size plesse
-
- WRA2 Member
- Posts: 10
- Joined: Sun Sep 20, 2015 2:45 pm
-
- WRA2 Member
- Posts: 47
- Joined: Sun Jul 19, 2015 5:19 pm
Re: Need help with o ring size plesse
I recommend you sand your launch tube down a bit so it fits more bottles. The o-ring will take up the slack and provide a nice seal for all of them. I believe you have a 1/2" launch tube, if you are launching 2-liter soda bottles.
As to a replacement, I believe you will find it in one of these kits: http://www.harborfreight.com/catalogsea ... t?q=o-ring
It's okay if you have to stretch the o-ring over the launch tube, so long as it fits in the groove you have cut and is thick enough to seal against your rocket.
Good luck!
As to a replacement, I believe you will find it in one of these kits: http://www.harborfreight.com/catalogsea ... t?q=o-ring
It's okay if you have to stretch the o-ring over the launch tube, so long as it fits in the groove you have cut and is thick enough to seal against your rocket.
Good luck!
-
- WRA2 Member
- Posts: 10
- Joined: Sun Sep 20, 2015 2:45 pm
Re: Need help with o ring size plesse
Thanks for the reply. And I do believe your right about it being 1/2 inch tubing I hadn't thought about sanding the tube but that's a great idea. Once again thank you.
-
- WRA2 Member
- Posts: 10
- Joined: Sun Sep 20, 2015 2:45 pm
Re: Need help with o ring size plesse
Would it be best to get SAE or metric sizes? And can any one please tell me right size I need. I know o rings come in different sizes. Out side and inside diameter and different #'s like #2 #3 ect. So I can simplify my buying. Sorry on a very strict budget here. Thank you very much in advance.