| Author |
Message
|
| JDP12 |
 Posted: 08/08/2010 7:30 AM Post subject: |
 |
|
Major General
Joined: 30 Mar 2007
Posts: 1872
2217.80 Spud Bux
|
I'll be postin an update later today on this gun, looks like it may get finished today but not tested til later this week thanks to JB Weld..
Also am starting to plan out a pump action type deal for this for long-term future project |
|
| Back to top |
|
 |
|
|
|
| JDP12 |
| Posted: 08/08/2010 19:58 PM Post subject: |
|
|
Major General
Joined: 30 Mar 2007
Posts: 1872
2217.80 Spud Bux
|
| not to double post, but just letting people know there's an update on the first post of the thread |
|
| Back to top |
|
|
| SpudFarm |
| Posted: 08/08/2010 23:17 PM Post subject: |
|
|
Captain Slow
Joined: 04 Nov 2006
Posts: 2579
1492.77 Spud Bux
|
The only problem I see is that the piston probably won't seal against the housing.
If you pressurize one side of the piston the rubber can probably just bend out of the way.
Use a pipe to the same diameter as your housing (SLIGHTLY bigger)to cut the rubber disk and use slightly bigger washers to stabilize the rubber materia.
Tell me if your deisgn works. |
|
| Back to top |
|
|
| JDP12 |
| Posted: 08/09/2010 7:44 AM Post subject: |
|
|
Major General
Joined: 30 Mar 2007
Posts: 1872
2217.80 Spud Bux
|
Yea I'm not sure. I did buy some washers that are .1" over the diameter of the housing, I just don't want to have to grind those down unnecessarily.
On the current setup, there is only .1" of rubber exposed around the washers. I'm afraid if I go any less I'm going to run into issues with the rubber not being able to properly seal, so I'm hoping that this current configuration will still give me a proper seal against the housing. |
|
| Back to top |
|
|
| SpudBlaster15 |
| Posted: 08/09/2010 11:41 AM Post subject: |
|
|
Hybridian
Joined: 18 Oct 2006
Posts: 2372
295.89 Spud Bux
|
The piston looks good, but I'd use a dremel with a sanding drum to smooth the edges of the rubber seals and ensure there are no gaps between it and the housing.
Spudfarm's concern regarding the rubber deflecting under pressure may be valid, but it really depends on the housing ID to washer OD ratio. How large is the gap between the steel components? On my setup, there is a .035" gap between the large piston washers and the inner wall of the housing.
Of course, if the rubber material is sufficiently thick, it can still form a seal between the outer edge of the washer and the inner surface of the pipe, even under full deflection.
Anyway, the launcher is starting to come together, and I can't wait to see the finished pictures. Hopefully everything works as you intend. |
|
| Back to top |
|
|
| JDP12 |
| Posted: 08/11/2010 11:51 AM Post subject: |
|
|
Major General
Joined: 30 Mar 2007
Posts: 1872
2217.80 Spud Bux
|
| Yea I plan on smoothing it down a bit. The gap between the edge of the washers and the inside of the housing is .14", so possibly too much? the ID of the housing is 1.39". I have some washers that are 1.5", but I don't know if I want to grind em all down. |
|
| Back to top |
|
|
| JDP12 |
| Posted: 08/11/2010 16:16 PM Post subject: |
|
|
Major General
Joined: 30 Mar 2007
Posts: 1872
2217.80 Spud Bux
|
|
| Back to top |
|
|
| JDP12 |
| Posted: 10/09/2010 14:35 PM Post subject: |
|
|
Major General
Joined: 30 Mar 2007
Posts: 1872
2217.80 Spud Bux
|
| Don't want to triple post, but I'm home for the next three days, so progress has recommenced on this. I started gluin up the piston today, hopefully will get some more work done on it. |
|
| Back to top |
|
|
|
|
