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Author Topic: AT44 + reg = stumped!  (Read 498 times))

Offline GoneShootn

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Re: AT44 + reg = stumped!
« Reply #20 on: May 04, 2021, 09:38:35 PM »
Dang that is SMOKIN' I have an AT 44 PA short in .177, them are more like the speeds I get with Xman 10.5 gr.  :o Wonder if it would like NSA 13.4 gr slugs, most of my PCP pellet barrels love them.  ???
 Also kept mine unregulated added a Long air tube, barrel extension to attach Fancy LDC past the extended tube, get 4 mags from a 2500 PSI fill, with narrow FPS spread.

Great tune! If you have a string you could post for those 40 shots, that would be nice.
  • Barnesville, Georgia
Benjamin Marauder .25, Gen 2, Hawke Sidewinder 6-24x56
Hatsan AT44 Long .25, synthetic stock, tuned by BWalton, Hawke Airmax 4-16x50
Hatsan AT44 Short .177, synthetic stock, Centerpoint 4-16x40
Hatsan AT44 Tactical QE .22, Hawke Vantage 4-12x40
LDC aka moderator aka suppressor by BWalton, used for both non-QE Hatsans
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Offline GoneShootn

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Re: AT44 + reg = stumped!
« Reply #21 on: May 04, 2021, 09:41:29 PM »
Instructions for the Robt. Lane reg for the at44 say to go with twice the valve spring tension. I have the Huma reg in my .25 cal at44 and that made a difference for me.

"Valve spring tension?" - that's a new one to me.
  • Barnesville, Georgia
Benjamin Marauder .25, Gen 2, Hawke Sidewinder 6-24x56
Hatsan AT44 Long .25, synthetic stock, tuned by BWalton, Hawke Airmax 4-16x50
Hatsan AT44 Short .177, synthetic stock, Centerpoint 4-16x40
Hatsan AT44 Tactical QE .22, Hawke Vantage 4-12x40
LDC aka moderator aka suppressor by BWalton, used for both non-QE Hatsans
ShoeboxMax compressor
California Air Tools 5510SE booster compressor
Ninja 90 cu in carbon fiber bottle
Hill MK3 pump
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Offline GoneShootn

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Re: AT44 + reg = stumped!
« Reply #22 on: May 04, 2021, 09:46:10 PM »
Jere:

Yeah...I’d be a bit frustrated as well.  That’s fast, but that’s a whole lot of air being used and it looks a whole lot like an unregulated shot string.

Not real clear to me...you’re increasing string tension as you go along?...or just leaving it alone to see what happens once it runs past reg-set?

Running past reg set might at one spring tension might tell you more.

Sorry. It was the unreg'd cylinder, and yes, I was increasing the hammer spring tension as I shot. First one was at 0.
  • Barnesville, Georgia
Benjamin Marauder .25, Gen 2, Hawke Sidewinder 6-24x56
Hatsan AT44 Long .25, synthetic stock, tuned by BWalton, Hawke Airmax 4-16x50
Hatsan AT44 Short .177, synthetic stock, Centerpoint 4-16x40
Hatsan AT44 Tactical QE .22, Hawke Vantage 4-12x40
LDC aka moderator aka suppressor by BWalton, used for both non-QE Hatsans
ShoeboxMax compressor
California Air Tools 5510SE booster compressor
Ninja 90 cu in carbon fiber bottle
Hill MK3 pump
MRodAir (Huben) pump

Offline GoneShootn

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Re: AT44 + reg = stumped!
« Reply #23 on: May 04, 2021, 10:06:44 PM »
Seems to me there's too much hammer spring, and too low of a regulator setting?  Just to clarify, what speed does the gun shoot currently with the regulator installed, and with what weight pellet?What speed are you wanting it to shoot?

Current speed - 850 to 910, depending upon where the reg was set. Probably could have gone higher. I would like to be at 850 to 900 FPS. All with JSB 10.34 gr pellets.

Quote
There's also a spacer in between the hammer spring and the hammer that can be removed to decrease the tension farther.

I hadn't thought of that. Thanks! But if a lighter spring seems to be necessary, would you have any suggestions as to where to find one?

Quote
The more I think about it, there could also be something going on with the de-bounce "wishbone" in the gun.  You didn't by chance remove it did you?  If so, that would definitely cause some issues.  That little piece works quite well in those guns, so it could be damaged, if you didn't remove it.  My first thought still stands too, of course.

I had removed it, but bounce was terrible, so I put it back in.

Thanks again!
  • Barnesville, Georgia
Benjamin Marauder .25, Gen 2, Hawke Sidewinder 6-24x56
Hatsan AT44 Long .25, synthetic stock, tuned by BWalton, Hawke Airmax 4-16x50
Hatsan AT44 Short .177, synthetic stock, Centerpoint 4-16x40
Hatsan AT44 Tactical QE .22, Hawke Vantage 4-12x40
LDC aka moderator aka suppressor by BWalton, used for both non-QE Hatsans
ShoeboxMax compressor
California Air Tools 5510SE booster compressor
Ninja 90 cu in carbon fiber bottle
Hill MK3 pump
MRodAir (Huben) pump

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Re: AT44 + reg = stumped!
« Reply #24 on: May 04, 2021, 10:28:53 PM »
Dang that is SMOKIN' I have an AT 44 PA short in .177, them are more like the speeds I get with Xman 10.5 gr.  :o Wonder if it would like NSA 13.4 gr slugs, most of my PCP pellet barrels love them.  ???
 Also kept mine unregulated added a Long air tube, barrel extension to attach Fancy LDC past the extended tube, get 4 mags from a 2500 PSI fill, with narrow FPS spread.

Great tune! If you have a string you could post for those 40 shots, that would be nice.

[/quote

 I will have to take it out and run a string lost my old strings in a phone accident. But will do because I need new info for myself also. Was a Close out or refurb deal, did not cost me much more then a Maximus at the time, who ever refurbed it dood it good IMO, one reason I likr Field supply refurbs, never been let down.
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Offline Rallyshark

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Re: AT44 + reg = stumped!
« Reply #25 on: May 05, 2021, 12:58:03 AM »
Seems to me there's too much hammer spring, and too low of a regulator setting?  Just to clarify, what speed does the gun shoot currently with the regulator installed, and with what weight pellet?What speed are you wanting it to shoot?

Current speed - 850 to 910, depending upon where the reg was set. Probably could have gone higher. I would like to be at 850 to 900 FPS. All with JSB 10.34 gr pellets.

Quote
There's also a spacer in between the hammer spring and the hammer that can be removed to decrease the tension farther.

I hadn't thought of that. Thanks! But if a lighter spring seems to be necessary, would you have any suggestions as to where to find one?

Quote
The more I think about it, there could also be something going on with the de-bounce "wishbone" in the gun.  You didn't by chance remove it did you?  If so, that would definitely cause some issues.  That little piece works quite well in those guns, so it could be damaged, if you didn't remove it.  My first thought still stands too, of course.

I had removed it, but bounce was terrible, so I put it back in.

Thanks again!

Removing the spacer will take out a lot of hammer spring, and should give you plenty to work with.  However, should you need an even lighter one, Ace hardware usually has a very good spring selection.  Simply take the factory one with you to match it up with one that will fit.  I believe you'll want one with an OD of 5/16 going by non metric sizing.

A reg setting of 115-120 bar will give you plenty of flexibility on the speed, while still allowing you to stay in the range you want. 

All of that being said, something is wrong in the gun.  I went back and re-read everything, and your strings shouldn't have been varying that wildly.  Even with the changes you were making, something is definitely up.  You have a blown o-ring somewhere in the mix I think.  It could be with the probe o-ring inside the barrel, the two on either side of the barrel port, the transfer port, or even one of the ones in the valve.  I saw the variation in your unregulated string too.  If you swapped the whole cylinder/valve over, then that rules out anything on the valve. 

The only other thing that would be likely to cause that much variation in speed that isn't an o-ring would likely be related to the debounce in some way.  Be it with the spring that sits on top of it, or the debounce catching the hammer when it goes by on the initial strike.  Something is going on somewhere though, and the whole reg situation and thoughts on it, can be thrown out the window until you solve that velocity variation.  I would double check the debounce, and make sure it doesn't have any gnarly edges and is moving properly, and check for puffs of air somewhere too.  Solve that, and I think the rest will fall into place.  I hope that helps :)
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Offline GoneShootn

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Re: AT44 + reg = stumped!
« Reply #26 on: May 05, 2021, 01:44:53 PM »
Seems to me there's too much hammer spring, and too low of a regulator setting?  Just to clarify, what speed does the gun shoot currently with the regulator installed, and with what weight pellet?What speed are you wanting it to shoot?

Current speed - 850 to 910, depending upon where the reg was set. Probably could have gone higher. I would like to be at 850 to 900 FPS. All with JSB 10.34 gr pellets.

Quote
There's also a spacer in between the hammer spring and the hammer that can be removed to decrease the tension farther.

I hadn't thought of that. Thanks! But if a lighter spring seems to be necessary, would you have any suggestions as to where to find one?

Quote
The more I think about it, there could also be something going on with the de-bounce "wishbone" in the gun.  You didn't by chance remove it did you?  If so, that would definitely cause some issues.  That little piece works quite well in those guns, so it could be damaged, if you didn't remove it.  My first thought still stands too, of course.

I had removed it, but bounce was terrible, so I put it back in.

Thanks again!

Removing the spacer will take out a lot of hammer spring, and should give you plenty to work with.  However, should you need an even lighter one, Ace hardware usually has a very good spring selection.  Simply take the factory one with you to match it up with one that will fit.  I believe you'll want one with an OD of 5/16 going by non metric sizing.

A reg setting of 115-120 bar will give you plenty of flexibility on the speed, while still allowing you to stay in the range you want. 

All of that being said, something is wrong in the gun.  I went back and re-read everything, and your strings shouldn't have been varying that wildly.  Even with the changes you were making, something is definitely up.  You have a blown o-ring somewhere in the mix I think.  It could be with the probe o-ring inside the barrel, the two on either side of the barrel port, the transfer port, or even one of the ones in the valve.  I saw the variation in your unregulated string too.  If you swapped the whole cylinder/valve over, then that rules out anything on the valve. 

The only other thing that would be likely to cause that much variation in speed that isn't an o-ring would likely be related to the debounce in some way.  Be it with the spring that sits on top of it, or the debounce catching the hammer when it goes by on the initial strike.  Something is going on somewhere though, and the whole reg situation and thoughts on it, can be thrown out the window until you solve that velocity variation.  I would double check the debounce, and make sure it doesn't have any gnarly edges and is moving properly, and check for puffs of air somewhere too.  Solve that, and I think the rest will fall into place.  I hope that helps :)

Thanks, Donny and everyone else. When I started this, I didn't expect a problem. Since I'm probably not going to sell the .177 (you know, SHTF and all :)), with apologies to all, I think I am going to move on to the AT44 Long in .25, which I probably will sell. I'm thinking of pulling the reg from the .177, upping the pressure a bit, which will only be a guess, and installing in the .25. Either I ordered the same reg as for the .22 (maybe for a .25) in order to get the larger plenum, or they are all the same. Don't know which. If I encounter any perplexing problems there, then I will create a new thread for that. Then I will come back to the .177 at a later date.
  • Barnesville, Georgia
Benjamin Marauder .25, Gen 2, Hawke Sidewinder 6-24x56
Hatsan AT44 Long .25, synthetic stock, tuned by BWalton, Hawke Airmax 4-16x50
Hatsan AT44 Short .177, synthetic stock, Centerpoint 4-16x40
Hatsan AT44 Tactical QE .22, Hawke Vantage 4-12x40
LDC aka moderator aka suppressor by BWalton, used for both non-QE Hatsans
ShoeboxMax compressor
California Air Tools 5510SE booster compressor
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Offline GoneShootn

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Re: AT44 + reg = stumped!
« Reply #27 on: May 05, 2021, 01:53:40 PM »
As I said, I'm probably not going to sell the .177 AT44, as I think it may be the ideal SHTF airgun. Pellets are cheap. You can shoot it low and slow for stealth and to get a lot of shots, and then you can generate a lot of power when you want by going to even heavier pellets and letting out the beast. It has a built-in hammer debounce device to address what is always an issue with the lower cost pcp guns, and you can easily remove it if you want. You can comfortably pump it and get a lot of shots, plus it's easy to work on. All in all, the AT44 is an impressive bit of engineering, IMHO, something important that this episode has reminded me.
  • Barnesville, Georgia
Benjamin Marauder .25, Gen 2, Hawke Sidewinder 6-24x56
Hatsan AT44 Long .25, synthetic stock, tuned by BWalton, Hawke Airmax 4-16x50
Hatsan AT44 Short .177, synthetic stock, Centerpoint 4-16x40
Hatsan AT44 Tactical QE .22, Hawke Vantage 4-12x40
LDC aka moderator aka suppressor by BWalton, used for both non-QE Hatsans
ShoeboxMax compressor
California Air Tools 5510SE booster compressor
Ninja 90 cu in carbon fiber bottle
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Offline rsterne

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Re: AT44 + reg = stumped!
« Reply #28 on: May 05, 2021, 06:00:06 PM »
If you can't get any drop of velocity when backing off the hammer spring tension, it is likely too strong for the lowered pressure supplied by the reg.... Two critical things on the Hatsan.... You must put a pin in the hole to prevent the hammer from turning.... and backing off the hammer spring means turning the adjuster clockwise when viewed from the back, the opposite of what you might think....

Bob
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Offline Texpatriate

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Re: AT44 + reg = stumped!
« Reply #29 on: May 05, 2021, 06:22:02 PM »
Instructions for the Robt. Lane reg for the at44 say to go with twice the valve spring tension. I have the Huma reg in my .25 cal at44 and that made a difference for me.

"Valve spring tension?" - that's a new one to me.

We learn new things all the time.  One spring holds the valve closed and one drives the hammer to pop it open. If altering the tension of one is effective why not the other? With the reduced air pressure in the regulated valve the stock hammer spring, even at lowest setting, is too much for the stock valve spring. If a little more tension is needed shims can be used on the stock spring. In other cases the spring is replaced with a stronger one. Robt. Lane has a table showing how much various guns should be altered. It shows the at44 should be increased by a factor of 2 (twice as stiff).
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Offline Ribbonstone

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Re: AT44 + reg = stumped!
« Reply #30 on: May 05, 2021, 08:04:15 PM »
Hillbilly guide to regulation:

Counter intuitive….but when running past reg setting…ignore that it was regulated up to that set point.

Once the regulator quits regulating, it’s a tiny volume non-regulated PCP and follows the same basic rules as any non-regulated PCP.

So lets pretend the reg is set for 1500psi, and you start looking hard at the shots starting from that point in the same terms as a non-regulated PCP.

As if he magic elves that were refilling your shooting chamber (plenum) went on strike and you have to consider the regulated PCP as a really tiny air volume non-regulated PCP.

So...once you are off reg….one of two things will happen (with a 3rd in a distance 3rd place).


1. Once past reg set, will drop in velocity like a narcoleptic buzzard.  The “Korean Cliff” whetre it suddenly starts dropping speed with ever shot you take.  That;s a real good indication that you are hitting the valve stem too hard for best efficiency (using more air than you are getting energy out….the right hand side of Bob’s “knee graph.

2. If the velocity/energy output stays real close for several shotys after going off reg, then you are close to even.  Are getting a kind of optimum efficiency, like being in the “plateau” of a non-regulated PCP.

DISTANT 3rd place.

3. It is possible to have the velocity increase for one or two shots after the reg has stopped being a regulator.  Locked open, do have a passageway to the rest of the air tube’s volume without the time/dwell delay of the reg cycling.

WHY YOU MAY NOT CARE:

If using a tank or compressor,  or both,  efficiency is just hooking up sooner to refill.  Basically a few cents more or less of electricity for a compressor….or a little sooner trip to the fill station to refill a tank.
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Offline GoneShootn

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Re: AT44 + reg = stumped!
« Reply #31 on: May 05, 2021, 11:13:46 PM »
Instructions for the Robt. Lane reg for the at44 say to go with twice the valve spring tension. I have the Huma reg in my .25 cal at44 and that made a difference for me.

"Valve spring tension?" - that's a new one to me.

We learn new things all the time.  One spring holds the valve closed and one drives the hammer to pop it open. If altering the tension of one is effective why not the other? With the reduced air pressure in the regulated valve the stock hammer spring, even at lowest setting, is too much for the stock valve spring. If a little more tension is needed shims can be used on the stock spring. In other cases the spring is replaced with a stronger one. Robt. Lane has a table showing how much various guns should be altered. It shows the at44 should be increased by a factor of 2 (twice as stiff).

I understand the valve spring, but in your first post it sounded like you were saying to set the reg at a pressure of 2x the valve spring, and that's what I didn't understand. But now it seems that you meant to double the valve spring strength, so how would I do that? How would I know what spring would be double the stock one? And thanks for the great info!
  • Barnesville, Georgia
Benjamin Marauder .25, Gen 2, Hawke Sidewinder 6-24x56
Hatsan AT44 Long .25, synthetic stock, tuned by BWalton, Hawke Airmax 4-16x50
Hatsan AT44 Short .177, synthetic stock, Centerpoint 4-16x40
Hatsan AT44 Tactical QE .22, Hawke Vantage 4-12x40
LDC aka moderator aka suppressor by BWalton, used for both non-QE Hatsans
ShoeboxMax compressor
California Air Tools 5510SE booster compressor
Ninja 90 cu in carbon fiber bottle
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Offline GoneShootn

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Re: AT44 + reg = stumped!
« Reply #32 on: May 05, 2021, 11:22:05 PM »
If you can't get any drop of velocity when backing off the hammer spring tension, it is likely too strong for the lowered pressure supplied by the reg.... Two critical things on the Hatsan.... You must put a pin in the hole to prevent the hammer from turning.... and backing off the hammer spring means turning the adjuster clockwise when viewed from the back, the opposite of what you might think....

Bob

Got it. Thanks, Bob. But I started at HS=0, so it was that I wasn't seeing an increase in velocity as I adjusted it outward, or upward, or CCW.

So to begin to address the issue, I can remove the hammer spring spacer, as Donny (Rallyshark) said and/or either decrease the hammer spring strength or increase the valve spring strength. Am I understanding correctly?
  • Barnesville, Georgia
Benjamin Marauder .25, Gen 2, Hawke Sidewinder 6-24x56
Hatsan AT44 Long .25, synthetic stock, tuned by BWalton, Hawke Airmax 4-16x50
Hatsan AT44 Short .177, synthetic stock, Centerpoint 4-16x40
Hatsan AT44 Tactical QE .22, Hawke Vantage 4-12x40
LDC aka moderator aka suppressor by BWalton, used for both non-QE Hatsans
ShoeboxMax compressor
California Air Tools 5510SE booster compressor
Ninja 90 cu in carbon fiber bottle
Hill MK3 pump
MRodAir (Huben) pump

Offline GoneShootn

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Re: AT44 + reg = stumped!
« Reply #33 on: May 05, 2021, 11:24:05 PM »
One thing is for sure - I came to the right place! I am continually amazed by the depth of experience and knowledge, as well as courtesy and dedication to the sport, of the members here. Thanks for being willing to help.
  • Barnesville, Georgia
Benjamin Marauder .25, Gen 2, Hawke Sidewinder 6-24x56
Hatsan AT44 Long .25, synthetic stock, tuned by BWalton, Hawke Airmax 4-16x50
Hatsan AT44 Short .177, synthetic stock, Centerpoint 4-16x40
Hatsan AT44 Tactical QE .22, Hawke Vantage 4-12x40
LDC aka moderator aka suppressor by BWalton, used for both non-QE Hatsans
ShoeboxMax compressor
California Air Tools 5510SE booster compressor
Ninja 90 cu in carbon fiber bottle
Hill MK3 pump
MRodAir (Huben) pump

Offline Texpatriate

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Re: AT44 + reg = stumped!
« Reply #34 on: Today at 08:14:14 AM »
[[/quote]

"Valve spring tension?" - that's a new one to me.

How would I know what spring would be double the stock one? And thanks for the great info![/quote]

That's a good question. Without the proper instruments I had to get an assortment of springs and try a couple out. It's unlikely that I got very close to exactly a factor of 2 but close enough to make a difference. For what it's worth, the spring in the newer "H class" valve feels at least twice as heavy as the old version.
« Last Edit: Today at 08:16:17 AM by Texpatriate »
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Offline rsterne

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Re: AT44 + reg = stumped!
« Reply #35 on: Today at 09:33:56 AM »
Personally, I would reduce the hammer spring, rather than increase the valve spring....

Bob
  • Coalmont, BC, Canada
Dominion Marksman Silver Shield - 5890 x 6000 in 1976, and downhill ever since!
Airsenal:
1750 CO2 Carbine, .177 Uber-Pumper, .22 Uber-Carbine, .25 Discovery, 2260 PCP 8-shot Carbine, 2260 HPA (37 FPE), 2560 HPA (52 FPE), XS-60c HPA in .30 cal (90 FPE), .22 cal QB79 HPA, Disco Doubles in .22, .25 & .30 cal, "Hayabusa" Custom PCP Project (Mk.I is .22 & .25 cal regulated; Mk.II is .224, .257, 7mm, .308 & .357; Mk.III is .410 shotgun and .458 cal), .257 "Monocoque" Benchrest PCP, .172/6mm Regulated PCP and .224/.257 Unregulated, Three regulated BRods in .25 cal (70 FPE), .30 cal (100 FPE) & .35 cal (145 FPE), .257 Condor (180 FPE).

Offline GoneShootn

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Re: AT44 + reg = stumped!
« Reply #36 on: Today at 01:49:45 PM »
So I will try removing the spacer first and see what that does, as BigTinBoat did in tuning his .177.
  • Barnesville, Georgia
Benjamin Marauder .25, Gen 2, Hawke Sidewinder 6-24x56
Hatsan AT44 Long .25, synthetic stock, tuned by BWalton, Hawke Airmax 4-16x50
Hatsan AT44 Short .177, synthetic stock, Centerpoint 4-16x40
Hatsan AT44 Tactical QE .22, Hawke Vantage 4-12x40
LDC aka moderator aka suppressor by BWalton, used for both non-QE Hatsans
ShoeboxMax compressor
California Air Tools 5510SE booster compressor
Ninja 90 cu in carbon fiber bottle
Hill MK3 pump
MRodAir (Huben) pump

Offline GoneShootn

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Re: AT44 + reg = stumped!
« Reply #37 on: Today at 01:53:06 PM »
[

"Valve spring tension?" - that's a new one to me.

How would I know what spring would be double the stock one? And thanks for the great info![/quote]

That's a good question. Without the proper instruments I had to get an assortment of springs and try a couple out. It's unlikely that I got very close to exactly a factor of 2 but close enough to make a difference. For what it's worth, the spring in the newer "H class" valve feels at least twice as heavy as the old version.
[/quote]

Thanks. "H Class?" Still in the AT44 valve type? Which Hatsan part list would I go to?
  • Barnesville, Georgia
Benjamin Marauder .25, Gen 2, Hawke Sidewinder 6-24x56
Hatsan AT44 Long .25, synthetic stock, tuned by BWalton, Hawke Airmax 4-16x50
Hatsan AT44 Short .177, synthetic stock, Centerpoint 4-16x40
Hatsan AT44 Tactical QE .22, Hawke Vantage 4-12x40
LDC aka moderator aka suppressor by BWalton, used for both non-QE Hatsans
ShoeboxMax compressor
California Air Tools 5510SE booster compressor
Ninja 90 cu in carbon fiber bottle
Hill MK3 pump
MRodAir (Huben) pump

Offline Texpatriate

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Re: AT44 + reg = stumped!
« Reply #38 on: Today at 03:26:19 PM »
Personally, I would reduce the hammer spring, rather than increase the valve spring....

Bob
It's true that you obviously know a lot more about this than I do. It's also true that it's a lot easier to fine tune the hammer spring. I know that's what most people do. I think Lane suggested both.
 On the other hand, with the stiffer spring in the regulated valve I can switch to an unregulated cylinder without changing my hammer spring setting.
  • USA,New York, Amherst

Offline GoneShootn

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Re: AT44 + reg = stumped!
« Reply #39 on: Today at 06:42:30 PM »
Personally, I would reduce the hammer spring, rather than increase the valve spring....

Bob
It's true that you obviously know a lot more about this than I do. It's also true that it's a lot easier to fine tune the hammer spring. I know that's what most people do. I think Lane suggested both.
 On the other hand, with the stiffer spring in the regulated valve I can switch to an unregulated cylinder without changing my hammer spring setting.

More good things to know and remember! Thanks. I am certainly being schooled by good teachers, and I just hope I can pass the final exam. :) I am going to print this entire thread out.
  • Barnesville, Georgia
Benjamin Marauder .25, Gen 2, Hawke Sidewinder 6-24x56
Hatsan AT44 Long .25, synthetic stock, tuned by BWalton, Hawke Airmax 4-16x50
Hatsan AT44 Short .177, synthetic stock, Centerpoint 4-16x40
Hatsan AT44 Tactical QE .22, Hawke Vantage 4-12x40
LDC aka moderator aka suppressor by BWalton, used for both non-QE Hatsans
ShoeboxMax compressor
California Air Tools 5510SE booster compressor
Ninja 90 cu in carbon fiber bottle
Hill MK3 pump
MRodAir (Huben) pump