Thanks!!!!!!!!!
piston help
Can someone help, my piston cracked, it was a pill bottle with bolt, nut, and a rubber washer, so can someone tell me what to use as a piston? The piston has to fit inside my 2'' chamber because my cannon is a barrel sealer DUH!
Thanks!!!!!!!!!
Thanks!!!!!!!!!
i could have told you it would have cracked....
you can use a 1.25' end cap wrapped in tape.
you can also mold one out of hot glue.
you can use a 1.25' end cap wrapped in tape.
you can also mold one out of hot glue.
"physics, gravity, and law enforcement are the only things that prevent me from operating at my full potential" - not sure, but i like the quote
you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
you know you are not an engineer if you have to remind yourself "left loosy righty tighty"
well if you're incredibly desperate you can make an excessively large spitball.I did that and it worked when i made my first piston valve.
but if you want something good get a rubber and push it down over the top of the cylinder which houses the piston until it cuts out and you should have a perfect fit rubber piston.Worked for me as well.
but if you want something good get a rubber and push it down over the top of the cylinder which houses the piston until it cuts out and you should have a perfect fit rubber piston.Worked for me as well.
Poo.
ah you posted he same thing twice.(well thats my captain obvious for the day 
)
Good Luck.
Happy SPuddin
)Good Luck.
Happy SPuddin
Poo.
It would probably work im guessing as long as it doesn't stick at all.I dont know anything about bondo but im pretty sure if it isnt sticky (creating friction) once its dried and its airtight and if it's strong enough you got yourself a piston.You be the judge if it matches the criteria.
Poo.
-
jackssmirkingrevenge
- Five Star General
- Posts: 26203
- Joined: Thu Mar 15, 2007 11:28 pm
- Has thanked: 569 times
- Been thanked: 343 times
It probably would work, you could use the same technique as for epoxy pistons.Arborman wrote:Nube question of the day, i know epoxy and hot glue pistons will work, but i dont have that.
I do have a butload of bondo (spelling?)
will that work?
Roughboy, did you include some sort of bumper to stop your piston slamming into the rear of your launcher on firing?
hectmarr wrote:You have to make many weapons, because this field is long and short life
-
jackssmirkingrevenge
- Five Star General
- Posts: 26203
- Joined: Thu Mar 15, 2007 11:28 pm
- Has thanked: 569 times
- Been thanked: 343 times
try another pill-bottle but this time fill it with bondo?
hectmarr wrote:You have to make many weapons, because this field is long and short life
-
Modderxtrordanare
- Corporal 2
- Posts: 686
- Joined: Mon Nov 20, 2006 1:22 pm
- Location: Texas
Or epoxy?jackssmirkingrevenge wrote:try another pill-bottle but this time fill it with bondo?
Even filling it with spray foam would help absorb some of the impact and keep it from cracking. It'd be lighter too.
Spudding since '05. Proud waster of plumbing and plumbing accessories.
-Wiki
-How-To: Modding a Sprinkler Valve
-Wiki
-How-To: Modding a Sprinkler Valve
I wouldn't make a piston out of Bondo. It's made of polyester resin mixed with talc so it can be very brittle. It isn't impact resist at all and after a coupel of fires if that it'll break up. If you do choose to go that way cover it in something like a layer of fibreglass otherwise prepare to replace them over and over....
Michael
Michael
Being as this thread is called "piston help" I have a question:
Firstly, I am using a 1.25" endcap with two O-rings around it. It can travel about 3/8" backwards. I want to pilot it with the smallest possible valve (hopefully a blowgun). To do this I assume that need to reduce pilot volume. Will filling the back of the endcap with epoxy be helpful? Or would the added piston weight overpower the benefit of the reduced pilot volume?
Firstly, I am using a 1.25" endcap with two O-rings around it. It can travel about 3/8" backwards. I want to pilot it with the smallest possible valve (hopefully a blowgun). To do this I assume that need to reduce pilot volume. Will filling the back of the endcap with epoxy be helpful? Or would the added piston weight overpower the benefit of the reduced pilot volume?