[blackcelldrumr15]

Florentine, on Jun 3 2009, 08:29 PM, said:

Haha, I was hunting with my sister. Once I got home and saw this thread, I posted immediately.

What were you hunting for? Get anything?

[Mitch Force]

Florentine, on Jun 3 2009, 06:29 PM, said:

Haha, I was hunting with my sister. Once I got home and saw this thread, I posted immediately.

Have you forgotten your duties as the resident matrix master?

[Florentine]

blackcelldrumr15, on Jun 3 2009, 08:55 PM, said:

Florentine, on Jun 3 2009, 08:29 PM, said:

Haha, I was hunting with my sister. Once I got home and saw this thread, I posted immediately.

What were you hunting for? Get anything?

Ground hogs, and I murdered 2.

Mitch Force, on Jun 3 2009, 09:00 PM, said:

Florentine, on Jun 3 2009, 06:29 PM, said:

Haha, I was hunting with my sister. Once I got home and saw this thread, I posted immediately.

Have you forgotten your duties as the resident matrix master?

Nope, I knew something was tingling while I was hunting.

[flyweightnate]

Groundhogs, eh? Kids these days and their slang...

[Florentine]

flyweightnate, on Jun 4 2009, 12:30 AM, said:

Groundhogs, eh? Kids these days and their slang...

You've never heard of a Ground hog?

[sipbgod94]

Aired up the PM5 today, oh god what a nightmare.

I had hoped since my buddy said it didn't leak that he was telling the truth.

well long story short its leaking out the back cap and straight through the bolt down the barrel.

I ordered a rebuild kit, I'm going to take it apart clean it up lube it slap new o-rings on and see if I have better luck.

[slinkyaroo]

Sip - have you tried a new battery? A low battery means the noid won't let the bolt sit properly and seal.

Also here's a good pic to print of and keep in your kit.

[sipbgod94]

slinkyaroo, on Jun 7 2009, 12:53 AM, said:

Sip - have you tried a new battery? A low battery means the noid won't let the bolt sit properly and seal.

Also here's a good pic to print of and keep in your kit.

It might be battery troubles but hey the gun hasn't been used in a long time and the last owner is an idiot when it comes to paintball and probably hasn't changed the o-rings or lubed it since he first got it so it needs new seals either way.

and thanks for the extra help I can always count on you guys

[flyweightnate]

Florentine, on Jun 4 2009, 08:49 AM, said:

flyweightnate, on Jun 4 2009, 12:30 AM, said:

Groundhogs, eh? Kids these days and their slang...

You've never heard of a Ground hog?

Heh... uhm... since this is a family site, I probably shouldn't go into detail regarding the joke I was hinting at. Note that the other name for a groundhog is a woodchuck. Therefore, note that yes, I am familiar with the creature. Also note that I occasionally ignore my 'better' judgment in favor of humor, and the prior post was one of those such times.

And you guys should be more situationally aware, as just a general rule of thumb.


By the way, I'd like to personally thank whoever it was who thought the PM5 was a good design. I'm actually impressed not with the design, but the fact an engineer was able to make it work. We have defied 6 of the critical rules of engineering, with pneumatics as our primary course of study. Rule one: only have 2 coaxial seals on any given moving part, or pair of surfaces between which movement occurs. This can be considered the single most important rule, and it was haphazardly thrown under a train in this design. I give you exhibit A, the diagram above, in which seals two through seven, which is a grand total of six (6) seals, are all coaxial across the same surfaces. Let us now note that this problem is further exacerbated due to seal 1 being coaxial to the entire assembly, and moving through the breech, which is held coaxial to the bore, through which the retainer for seals 5, 6, and 7 passes. We also have a possibility for misalignment between our red and blue parts, which would cause a necessary deflection in the bolt, and a possible misalignment between our green and blue parts, which would cause excessive wear on the bolt, and both would necessarily attack the seals. We have seals crossings cross-drilled ports, but luckily only a single seal (7) with intermittent contact. Add to this, not a SINGLE seal on the gun is redundant, so if one fails, the gun fails. No backups. Take notes. This is a bad design.

Would you like to see an example of good design? Check out the Hollowpoint Bolt for the Ion. Two (2) seals, both moving on the same piece.

It's late and I've lost my tolerance for idiocy... but in short, if you ever make a paintball gun, use the PM5/ DM5 as an example of BAD. It's a good thing they're well-machined, or they'd never work.

This post has been edited by flyweightnate: 07 June 2009 - 10:14 PM