Tale of THREE BRods - .25, .30 and .357 Completed, Page 19 !

[rsterne]

I "may" have a spring available locally next week.... the diameter will be OK, but the guy didn't know the wire size.... it wasn't listed in the catalogue.... *LOL*....

I may have to wind my own, if I have any suitable wire kicking around.... What is the wire diameter in the one you are using, Travis?.... Sounds like a stiffer spring just makes the slope of the cliff a bit shallower?.... not a rounded curve with a knee, but a steep hill instead of a cliff?.... How stable is the velocity if you tune 50-100 fps below the plateau, like you normally would on a conventional valve to tune on the knee?.... Is the ES low, or does it jump around?.... In other words are we really just spinning our wheels here?....

Bob

[Gippeto]

Or go exotic and use two stage poppet with big throat!

Been a while since I've seen that one....

http://www.network54.com/Forum/519893/thread/1164752966/big+bore+co2+valve

[oldpro]

I "may" have a spring available locally next week.... the diameter will be OK, but the guy didn't know the wire size.... it wasn't listed in the catalogue.... *LOL*....

I may have to wind my own, if I have any suitable wire kicking around.... What is the wire diameter in the one you are using, Travis?.... Sounds like a stiffer spring just makes the slope of the cliff a bit shallower?.... not a rounded curve with a knee, but a steep hill instead of a cliff?.... How stable is the velocity if you tune 50-100 fps below the plateau, like you normally would on a conventional valve to tune on the knee?.... Is the ES low, or does it jump around?.... In other words are we really just spinning our wheels here?....

Bob

It will lower the ES and give you a steep wall to climb but every bit helps. Its still a balancing act with pressure.

[oldpro]

Or go exotic and use two stage poppet with big throat!

Been a while since I've seen that one....

http://www.network54.com/Forum/519893/thread/1164752966/big+bore+co2+valve

Thats a cool design did he ever build one? First time Ive ever seen it but I never go over there(Yellow)

[Gippeto]

Don't think he did. Started a slightly different take on it and then ....nothing.

http://www.network54.com/Forum/519893/message/1165642350/revised+big+bore+valve

Doesn't matter...I doubt it was the first time the idea rolled around, and doubt it'll be the last. We keep re-inventing the same wheel.

Al

[oldpro]

Don't think he did. Started a slightly different take on it and then ....nothing.

http://www.network54.com/Forum/519893/message/1165642350/revised+big+bore+valve

Doesn't matter...I doubt it was the first time the idea rolled around, and doubt it'll be the last. We keep re-inventing the same wheel.

Al

Aint that a fact!!

[MJP]

Travis, did that exotic valve in your pictures work? Did it close at all?
Looks interesting, but seems to me the benefit of the larger valve goes to flow obstructions around it?

Marko

[grand-galop]

Don't think he did. Started a slightly different take on it and then ....nothing.

http://www.network54.com/Forum/519893/message/1165642350/revised+big+bore+valve

Doesn't matter...I doubt it was the first time the idea rolled around, and doubt it'll be the last. We keep re-inventing the same wheel.

Al

 

I`m just throwing a 2 cent here and not going main Stream..  Would a Airforce valve reversed could be make with the port upward???
The normal usage of a popet valve is so that more surface of OBSTRUCTION is more difficult to move around ..  The AIRFORCE valve due to it`s cylindrical empy core shape could manage that INSTANT airflow..   RIGHT??

[MJP]

There is no point making a valve like that, it's not the stem that is so much of an obstruction, it's the 90 degree turn that cuts back flow.

Marko

[rsterne]

Alain, the stock Air Force valve is not "straight through", it has lots of corners for the air to flow around after the poppet.... Doug's aftermarket AF valve, not so much.... but they should all be called "axial-flow" valves, not straight through, as the air still has to flow around the head of the poppet....

Bob

[rsterne]

I took a break from tuning today to work on the Tactical version.... I measured up the length, selected a hole in the adjustment range of the AR style stock that would give me about 14.5" LOP, and then made the new end plug / stock adapter....



As always, I am astounded how long it takes to make a simple part from scratch, designing on the fly.... about 5 hours for this, believe it or not.... 

Bob

[Gippeto]

I believe it.

Al

[Sfttailrdr46]

  Well what else can you do with 5 ft icicles hanging from the eaves and 3 feet of snow with arctic weather conditions except hole up in the shop and build stuff to play with when the weather warms up again

[oldpro]

Sounds like every other day of my life.

[rsterne]

I installed a taller sear from Lloyd in the PRod trigger group today and installed it on one of the tubes.... Since the PRod tube is thinner wall and smaller diameter, the sear would otherwise not project far enough through the Mrod sized tube to catch the hammer.... Once that was done, then I made a foregrip out of a piece of 1-1/4" ABS black plastic pipe.... It is just the right thickness to fit between the tube and the barrel, and I notched it around the receiver.... It fills the entire space between the trigger group and the drop block....

Here is what the Tactical version looks like with the PRod trigger group, the AR style stock, and the tubing foregrip.... I'm quite pleased with how it turned out....



As shown, with the 500 cc bottle (no regulator) it weighs 7 lbs. 3 oz.... I have never shot a Tactical style gun before, and beauty isn't exactly a strong point, IMO.... but the ergonomics are interesting.... I mounted a scope in Medium height rings, and the cheek weld is really solid and the perfect height for me, with the stock mount lined up with the center of the MRod tube.... That's nice, because that is how I made the mount, and it's a lot easier than making an offset one.... I find the high toe of the stock strange, compared to what I am used to, but the toe of the butt sits nicely in the pocket of my shoulder, so it is actually quite comfortable.... I can see the practicality of a Tactical stock, and how you could quickly grow to like it....

Bob

[Machinist]

Nice looking $100 adapter.  I made lots of $50 bolts, $10 washers.  The $500 paperweights are what gets me down.  I have a bunch of music wire if you need some.  Up to .055"

Steve

[MJP]

That's nice Bob, good proportions the ergonomics should be good. Where's the balance point at?

Marko

[oldpro]

Might have to dig up a carbon bottle for my buddy. That would really cut the weight down.

[rsterne]

Balances within the foregrip....

Travis, you tease you.... *eyeroll*....

Bob

[TerryH]

Being one that likes the tactical look and feel, I must say Wow!! Very nice! Love the simplistic, straightforward look of it.