Huben Hammerless K1

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Nice video Gregor!
Good luck at the IWA, I hope that you can build a good relationship with Huben, and find out where they got those cast bullets they used in the first video I seen. It may be better if we can purchase them from their supplier. 
https://www.youtube.com/watch?v=g_fDRnyI7go.
My Huben still has not arrived that I ordered in September. I called Mike with Mrodair at the end of January, and he said that because of the Lunar New Year no one was working in China. The New Year was over the first week of February, still no Huben! ;o( Let us know how it went with them, we all are interested in more info!!
Cheers My Brother!
 
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Wager
I was apprehensive about putting money down on a gun, but when Mike called me, he said that the shipment would take around 90 days with the new barrels, I figured that I could wait 3 months for the upgraded version. That was in the middle of September, so if he was waiting for a certain order amount, than it could have been the end of September before he ordered them, giving him the benefit of doubt the order should have been here by the end of December, then counting Christmas, and New Year the latest would have been Jan 15th. Thats when I called him.

He then mentioned that he was waiting on the finish of the Lunar New Year.

Chinese Calendar New Year's 2017 Date Jan. 27 Jan. 28 Jan. 29 Jan. 30 Jan. 31 Feb. 1 Feb. 2

So with that being said, they should have been shipped at the very least by Feb 13th, putting the shipment in San Diego, Cal. by 2/20/17 with 2 days for container unloading, and another 2 days to reach them. Then another 10 days for Mrodair to receive, test, and ship, means the drop dead last day they should have been in our hands was 2/28/17.
It is now 3/4/17 it has been 177 days, so much for 90 days!!
 
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I am sorry to hear that you have not received your gun from mrodair. I didn't get responses from them when I asked questions, so I would not put money down. I ended up buying from Topgun/ExpertHPA which is Joe Brancato's company. I had a good experience with them.

When I was looking into mrod, they were listed as a dealer with Huben, but now they are not. Here is the link: http://www.hubenairguns.com/contact.html
 
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Hi. Here are some news regarding Huben K1 for IWA. The current version (version 2) has modified trigger (I am not sure how, but I think it should be lighter that the previous one), they also changed the barre according to my specification, so now it shoots pellets and bullets quite well (as long as the velocity is not too high and the bullets are not too long...). There are some other minor changes that are less important... Huben will sent me one K1 version 2 for test and to make a videos on correct usage, user disassembly and reassembly... I will give more information when I receive it... Suncityairguns probably reviewed the version 2 judging by the accuracy with JSB pellets and the external looks (there are also minor external differences as well)
 
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I wish I understood the accuracy issue from previous model but maybe now it's fixed. It makes sense that the Version 1 wasn't accurate with very long pellets like the JSB Beast. As I understand it from Gregor's videos it was because the twist rate was too slow for that pellet's BC. But I never understood why it wouldn't shoot pellets like JSB 18.1's accurately. I mean - if it had the same LW barrels as other airguns that are very accurate with that pellet, why would it differ?
It doesn't matter now if it's fixed on the Version 2 but i'd still like to know - if anyone has the answer...

So how does that work with the new barrel? Does LW offer different twist rates off-the-shelf and Huben selected a faster one or would LW have to make special barrels for them?
 
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I wish I could explain why the first barrel did not like JSB's, but I cannot because I don't understand it either. The new barrel is a standard LW barrel for LR. They have contacted me a while ago and I recommended this barrel. The twist is slightly faster, but not too fast so it shoot light (short) pellets well too. In my opinion it is the correct choice for the gun to shoot reasonably well everything form pellets to slug. Very heavy (long) slugs will still prefer an even faster twist, but too fast twist would have a bad influance to light (short) pellets. I am working with Rojal on a new barrel that will be optimized for extremely heavy bullets. As you can imagine, it will have an even higher twist rate.
 
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"Gregor"I wish I could explain why the first barrel did not like JSB's, but I cannot because I don't understand it either. The new barrel is a standard LW barrel for LR. They have contacted me a while ago and I recommended this barrel. The twist is slightly faster, but not too fast so it shoot light (short) pellets well too. In my opinion it is the correct choice for the gun to shoot reasonably well everything form pellets to slug. Very heavy (long) slugs will still prefer an even faster twist, but too fast twist would have a bad influance to light (short) pellets. I am working with Rojal on a new barrel that will be optimized for extremely heavy bullets. As you can imagine, it will have an even higher twist rate.
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Gregor, I have an idea that should help those with a Version 1 gun. It is to create what looks like a silencer, but is actually a section of barrel with a faster twist rate. This would cause pellets/bullets to increase the spin rate the last few inches, effectively creating a barrel with Gain-Twist rifling. This would be easier for end users to install and remove, while being cheaper to manufacture. The "Smooth Twist" barrel used by FX is a Gain-Twist barrel, as is the GAU-8 Avenger Gatling gun used on the A10 "Warthog" ground attack plane.
 
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"WylieCoyote"
"Gregor"I wish I could explain why the first barrel did not like JSB's, but I cannot because I don't understand it either. The new barrel is a standard LW barrel for LR. They have contacted me a while ago and I recommended this barrel. The twist is slightly faster, but not too fast so it shoot light (short) pellets well too. In my opinion it is the correct choice for the gun to shoot reasonably well everything form pellets to slug. Very heavy (long) slugs will still prefer an even faster twist, but too fast twist would have a bad influance to light (short) pellets. I am working with Rojal on a new barrel that will be optimized for extremely heavy bullets. As you can imagine, it will have an even higher twist rate.
Click to expand...
Gregor, I have an idea that should help those with a Version 1 gun. It is to create what looks like a silencer, but is actually a section of barrel with a faster twist rate. This would cause pellets/bullets to increase the spin rate the last few inches, effectively creating a barrel with Gain-Twist rifling. This would be easier for end users to install and remove, while being cheaper to manufacture. The "Smooth Twist" barrel used by FX is a Gain-Twist barrel, as is the GAU-8 Avenger Gatling gun used on the A10 "Warthog" ground attack plane.
Click to expand...
And how would said barrel extension be attached to the existing barrel? Seems like it'd be a bitch to perfectly align the lands where they meet.
 
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"skorec" Interesting idea but perfectly align the twist lands where they meet is probably impossible and also to reach more spin without damage the shirt on the too heavy lead pellets need longer and deeper bore I guess . But flatter trajectory at lower power and noise is the real challenge also for me.
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Lower power means lower speed. Flatter trajectory at a lower speed is somewhat hard to achieve. Would need some sort of anti-gravity coating on pellets I think ;-)
 
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It is true that Gain Twist has traditionally meant that the rifling started out gradual but then increased under the theory that there is less vibration in the projectile going from nothing to an aggressive twist. This was done as far back as the American Civil War in the Colt Army and Navy Revolvers but ended up changing to a fixed rifling because of cost and difficulty in all but military projects.
Adding onto the end of the barrel also means that there will be a crown at the end of the barrel as well.It would certainly need to be precise, but how is it different than the twist getting more aggressive? In all Gain Twist barrels the rifling changes, so the lands and groves will change as well. As long as the bullet/pellet is able to obturate, it should increase gyroscopic inertia thus increasing projectile stability. I think the real issue is that the Huben is the rare gun with significantly adjustable power which leads to projectiles dancing around in the velocity just below and into supersonic region. The rifling and projectile both need to take this into account. A light projectile is inherently unstable at these pressures. 

"Would need some sort of anti-gravity coating on pellets I think"
That is still Classified and unavailable to the public.
 
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Interesting points and ideas from all of you. I agree that adding additional short barrel at the end of an existing one presents too many would probably not produce good results. Progressive twist also in my opinion is not needed, specially not in airguns. The pellet is accelerating along the barrel and gaining velocity as well as RPM gradually at the same time, so it is not a violent start even if the twist is constant because the pellet / bullet is in the rifling from the beginning. I would be more worried about the afgressive start of pellet rotating in a ST barrels as the pellet hits the "rifling" with its full velocity... But the ST twist is so mild that it is OK. Progressive twist also has another downside; it damages the pellet/bullet as the angle of the lands that cut in it changes. This is my layman thoughts on progressive twist, I do not have any experience with it...
As for the additional suppressor: Huben does not have an option to fit an additional suppressor but it would be possible to make an adapter by removing the end cap of the shroud....
 
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@kidcurrie--how to quiet the Huben: might as well ask how to make dandelion fluff softer. It is rediculously quiet at backyard safe energies (15-45 fpe}. At 15 fpe an equivalent might be: stack two plastic poker chips on a magazine (the paper periodical sort); with one finger slide the top chip off the other firmly onto the magazine. That's about the sound. At 45 fpe repeat the chip sliding on a butcherblock table. All of the sound comes from the action. I can't discern any sound from the barrel at all. 

At 60 fpe, even if the sound was that of eider down falling on a marshmallow, it wouldn't be backyard friendly. There's more than sound to friendliness.
 
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