First of all. Weevil, apologies for hi jacking your thread. Not my intent.
MushroomPsyche, that is exactly the information I needed, including the info on the projectiles! Thank You very much!
Oh, by steps I meant. HST adjustments.
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Taipan Ugly/Beautiful
- Thread starter weevil
- Start date
MushroomPsyche, that is exactly the information I needed, including the info on the projectiles! Thank You very much!
Oh, by steps I meant. HST adjustments.
I have been playing around with other slugs. It’s difficult to beat the Altaros, but I’m finding that Zan 28grain .217 are exceptional, right out to 100y. I’m running them at 900fps, which gives a nice shot cycle with my reg bumped up around 10bar from stock. Less expensive and hollow point.
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I’ve had very good results with Zan too. So far the best slug I’ve shot. 35’s were good, 37’s are great. Next I’ll try the 41’s.
I likely just don’t know what I’m doing but It sure seems like this gun likes a higher reg pressure and a lighter HST. It gets good shot counts and it feels/sounds good. Right now my reg is at 136 bar, peaks low/mid 970’s with the 37’s and shoots really well at 900. So far, each time I tune 2-4% below the peak, it just doesn’t shoot, sound or feel right. Maybe tuned this way the valve dwell is shorter and it likes that? I’m not sure. I need to shoot a lot more to see if it’s consistent.
I likely just don’t know what I’m doing but It sure seems like this gun likes a higher reg pressure and a lighter HST. It gets good shot counts and it feels/sounds good. Right now my reg is at 136 bar, peaks low/mid 970’s with the 37’s and shoots really well at 900. So far, each time I tune 2-4% below the peak, it just doesn’t shoot, sound or feel right. Maybe tuned this way the valve dwell is shorter and it likes that? I’m not sure. I need to shoot a lot more to see if it’s consistent.
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I had two of the Veteran 1 and both the Long (now sold) and Standard have a very distinct ping.
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the ping can be fixed with a little hard plastic shim between the spring and the hammer. It seems to come from that interaction rather than hammer on valve pin
Slyde - I agree that it favors a higher drop from peak. Once it starts to sound angry, the accuracy suffers. Thankfully the reg is not creepy.
Slyde - I agree that it favors a higher drop from peak. Once it starts to sound angry, the accuracy suffers. Thankfully the reg is not creepy.
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See post 27:
www.airgunnation.com
Tuning - TAIPAN ... Veteran No more hammer PING & Some other tuning tricks
At some point I'm going to fabricate a replacement Thimble being a single hole feeding the air behind a chambered pellet. Doing so we will shrink the dead air volume further within the transfer passage which should yield greater efficiency allowing us to reduce HST slightly for the same output...
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So much for not tinkering!
Having spent a few weeks very much enjoying the Vet 2 .22 Tact, it became clear that it quickly hits a wall in terms of power at around 55fpe. Bumping up the reg and hammer does very little above 50fpe because, in short, the valving is a major impediment.
I’m not looking to turn it into a hotrod, but would like to get it into a state to shoot the Zan 28g slugs at 900fps without starting to strain the system with excessive hammer. One method would be to open up the brass valve, but I’ve heard that they’re quite fragile, so I opted to do a peek poppet with a stem that’s thinned close to the poppet surface.
Not having access to a decent lathe, the major challenge for me involves the drilling and placement of the stem, but I overcame this by making a 3D printed drilling jig that put the hole in the poppet dead center. I then reused the stem from the original poppet (which popped off far too easily for my liking), after reducing its diameter to 2mm (from 3) in the 10mm long section behind the poppet face. This effectively opens the valve throat area. The stem was then tapped into the peek and the poppet was shaped on my crappy mini lathe. The OD was reduced from 7.7mm to 7.5mm. I then surfaced the poppet face using another 3D printed jig that allowed fine sanding, culminating in 6000grit 3M cloth. It sealed right away and has been holding pressure for over 4 days.
The theory here is that the PEEK poppet opens more easily because there is less compression of the seal to overcome, so less hammer is needed to open the valve. In addition, the throat is opened by the reduced oD of the stem, allowing more flow.
The gain here isn’t huge and wasn’t intended to be - around 30fps peak at the same reg pressure of what’s estimated to be 140bar. However, I no longer need to use any shimming of the hammer spring and have the added bonus of a quieter hammer. The modest increase in power is enough to allow the gun to be in a comfortable spot shooting the Zan 28 at a speed of 905fps. I don’t know if it’s due to reg settling or this new PEEK poppet, but the ES is now down at 2!
Since getting the Mora 22, which is shooting 40g Altaros at 900fps without even breaking a sweat, I’ve decide to dedicate the Vet 2 towards shooting these .217 28 grain hollow point Zans, which it seems to shoot just as well as the Altaros. The cost are lower for one, but more importantly, I’m not so worried about the downstream consequences of pass through.
With this less edgy tune and stupidly low ES, the Vet 2 is astonishingly accurate. The RTi Mora is also fantastic but not as easy to shoot accurately, at least for me. Here’s a target from this morning at 80yards where I lost count of the number of shots and still got CTC ~1 inch. It’s still not a pretty gun but the shot cycle and ergos are fabulous…
Having spent a few weeks very much enjoying the Vet 2 .22 Tact, it became clear that it quickly hits a wall in terms of power at around 55fpe. Bumping up the reg and hammer does very little above 50fpe because, in short, the valving is a major impediment.
I’m not looking to turn it into a hotrod, but would like to get it into a state to shoot the Zan 28g slugs at 900fps without starting to strain the system with excessive hammer. One method would be to open up the brass valve, but I’ve heard that they’re quite fragile, so I opted to do a peek poppet with a stem that’s thinned close to the poppet surface.
Not having access to a decent lathe, the major challenge for me involves the drilling and placement of the stem, but I overcame this by making a 3D printed drilling jig that put the hole in the poppet dead center. I then reused the stem from the original poppet (which popped off far too easily for my liking), after reducing its diameter to 2mm (from 3) in the 10mm long section behind the poppet face. This effectively opens the valve throat area. The stem was then tapped into the peek and the poppet was shaped on my crappy mini lathe. The OD was reduced from 7.7mm to 7.5mm. I then surfaced the poppet face using another 3D printed jig that allowed fine sanding, culminating in 6000grit 3M cloth. It sealed right away and has been holding pressure for over 4 days.
The theory here is that the PEEK poppet opens more easily because there is less compression of the seal to overcome, so less hammer is needed to open the valve. In addition, the throat is opened by the reduced oD of the stem, allowing more flow.
The gain here isn’t huge and wasn’t intended to be - around 30fps peak at the same reg pressure of what’s estimated to be 140bar. However, I no longer need to use any shimming of the hammer spring and have the added bonus of a quieter hammer. The modest increase in power is enough to allow the gun to be in a comfortable spot shooting the Zan 28 at a speed of 905fps. I don’t know if it’s due to reg settling or this new PEEK poppet, but the ES is now down at 2!
Since getting the Mora 22, which is shooting 40g Altaros at 900fps without even breaking a sweat, I’ve decide to dedicate the Vet 2 towards shooting these .217 28 grain hollow point Zans, which it seems to shoot just as well as the Altaros. The cost are lower for one, but more importantly, I’m not so worried about the downstream consequences of pass through.
With this less edgy tune and stupidly low ES, the Vet 2 is astonishingly accurate. The RTi Mora is also fantastic but not as easy to shoot accurately, at least for me. Here’s a target from this morning at 80yards where I lost count of the number of shots and still got CTC ~1 inch. It’s still not a pretty gun but the shot cycle and ergos are fabulous…
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