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Teryx · Veteran Member

Has anyone seen this??

http://www.youtube.com/watch?v=bynE4W_kWBQ&feature=channel

He is running over 4,000 PSI reservoir pressure Shocked

, and 1,233 PSI chamber pressure. 885FPS with what appears to be a .22 caliber. The consistency is amazing! That bullpp rifle that he built is a work of art.

I'm going to order one of the regulators unless the price is outragous.

Teryx

rsterne · Moderator

The guy posted on this forum several times.... but he won't answer and questions.... including price.... Rolling Eyes

Bob

Teryx · Veteran Member

Really? That seems a bit bizarre. We'll see if he answers my email. He's obviously soliciting sales, so why wouldn't he respond? Shrug

Teryx

AirGunEric · Site Admin

Strange guy. He has actually been banned from the forum now, as he was asked, both in public posts and in private messages to stop just coming out and posting his "ad" and not answering anyone's questions. He was, for all intents and purposes, only spamming the board. As he continued to appear and post random ads and not respond to anything, he was given the boot.

But, if this is how he deals with potential customers, perhaps this is all for the best- hate to have anyone get the short end of a transaction because we allowed someone to post their stuff here despite the obvious deficiencies in communicating with people.

Teryx · Veteran Member

I understand Eric. You can't let spam go, no matter how juicy it looks. I'll see if he responds to my email. If I do order one I'll consider the money lost till I get the regulator. We may need to work on a homegrown device if he just isn't interested.
Teryx

Teryx · Veteran Member

Well, I have had several communications with Audrius in just this short time. He is Lithuanian. His english is a little choppy and he may be using a translator, but so far he has answered my questions and returned my communications quickly. So far I've got him files under "good guys". The device is 67 Euros including shipping anywhere in the world. That works out to roughly $100 as of last night. He takes paypal. He has built many regulators for the Marauder and says that 115bar is where most people have had the best result for good power and number of shots. He did not give me specifics but he did send me to a Dutch forum and this thread:

http://www.luchtbuks.net/index.php?showtopic=41033

I translated and read the whole thing last night. The guys who have used it seem very pleased. If I remember right, the guy who enlarged his ports and chamber was getting around 30 shots that were dead flat as far as pressure at 115 bar, but I could never find what his initial fill was.

One issue that was discussed was the efficient use of air. I guess some pressure is lost with each cycle of the regulator, which doesn't surprise me. The valving allows a fairly close fill and then it bleeds down to the final pressure. The design that Audrius is using bleeds that pressure to the outside via a small hole that must be drilled in the reservoir.

By all accounts the device does deliver in the repeatability catagory extremely well.

One last thing that wasn't addressed in the Dutch thread was what effect all the modifications had on accuracy. The velocities and shot numbers posted looked to me like they could be achieved with a box stock Marauder, or at least an unregulated one. Keeping the pressure so well controlled should improve the accuracy, but did it? I don't know. Unless that result is nailed down it is unclear to me whether the device and other possible modifications are really worth the trouble.

I plan to get one, but I won't be installing it until I establish a solid baseline for the rifles stock performance in all categories. Velocity, air usage, and accuracy all count. I saw that Broom was at the Dutch forum. Maybe he gleaned some more detail being able to speak the language?

Teryx

AirGunEric · Site Admin

Good to hear he was communicative. If you speak with him again- might want to mention he's probably lost more business that he's gained by not responding to people's questions in many forums.

In any event, Broom does hang around the luchtbuks forum, so perhaps he can help with the investigation. Good luck with everything and keep us updated!

rsterne · Moderator

Just from the variation in velocity in an unregulated gun, there is probably very little difference in accuracy because of that alone.... The difference in drop can be calculated, and with a BC of 0.035 (round nose JSB) at a muzzle velocity of 850 fps.... a 4% range of velocity (ie 98% to 102%) will only cause a vertical POI change of 0.16" at 50 yards and 1.71" at 100 yards.... Shocked

I use that 96% range of velocity for all my shot strings and shoot within that window for just that reason.... Wadcutters will have a much larger POI shift because of the poorer BC of course.... Rolling Eyes

Bob

broommaster2000 · Moderator

I've asked in that specific thread if they had any groupings. Wink

Check back later to see.

Teryx · Veteran Member

Teryx · Veteran Member

I ordered the regulator, but I'm not putting the cart before the horse. I'll be spending some time with the stock rifle to establish performance baselines before I install the regulator.
I'm not sure what went wrong here with the communications with Audrius. I haven't had any problems. He struggles with english, but it's alot better than my Lithuanian. Smile

He says he is an engineer (20 years) and likes air rifles as a hobby.

Teryx