N-Forcer - Moeller Gas Springs

[gene_sc]

The piston on the Hatsan break barrels are solid steel. When they slam home it is quite an impact. The piston will bounce some and so will the gas ram when installed with gas chamber in piston. The impact is much greater than when the gas ram is set so the shaft goes in the piston. The shaft takes the abuse and will compress some when it hits bottom.

It is my opinion that the life of the ram will be cut short if installed with chamber in pison.

Guys lets not get carried away here and trash this thread. I did not start this thread for it to get trashed.  Super Tech has answered the biggest part of my questions about the size of gas ram. No need to carry this thread any further.

Gene

[AirHunter4Ever]

To answer Gene's original question about gas rams used in the Hatsan 125:

From what I have read in threads here on GTA, both the N-FORCER MF19-125-YW and the MOELLER M90-125-YW gas rams have been tested in the Hatsan 125.

The Hatsan 125 has a 120mm stroke and those rams have a maximum 125mm stroke.

[Paul68]

Scotchmo provided some very good info on conversions he worked with nearly a year ago, with the the gas springs he determined worked well. Very good thread.

http://www.gatewaytoairguns.org/GTA/index.php/topic,20192.0.html

[fortyshooter]

Well I may now have some access to these gas rams again. I start next week,on a flexible part time basis,helping a company in their
Tool&Die dept.  Pick up a few bucks to help with retirement.

[sawtoothscream]

Part of the problem, IMO, was the lack of "hard data" at the time, using how far a pellet would penetrate things, and observations about how hard it would knock things over, instead of Chrony numbers.... Plus, they wanted to be quite secretive about what they were doing to get the results they claimed, and didn't really appreciate questions about the shooting characteristics.... Now I'm not saying they didn't do what they claimed, but with no hard numbers, and no way for others to duplicate their results.... it kind of became a gong show.... It's really too bad, because some good things went down the tube, lost with all the hype....

Bob

to be fair mike does have a chrono and is using it in his testing and has got away from the real heavy pistons because they were just not fun to shoot, also I believe him or tarheel were getting the trigger parts stress tested to see what they can handle before they got the boot.    not arguing hear just some info.  mike has been testing like crazy

[Voltar1]

Well, Gene simply asked which rams were used and hopefully I got em right, but since once again it seems there is some misconception that this is some pioneering or innovative work that could only be found through former members, I'll throw out two links to conversions that have been around far longer than either Mike or Tarheel's efforts. There are more, but the point should be clear.

Hey cool, that first link is ME haha....

[Voltar1]

I have had a Hatsan 125 and 85 running a gas spring for some time. The latchup on these old style guns is shyte so needs fixing to get decent results.

With a hollow piston they are a natural for gas springs.

Walter....

BTW was put onto these by Airgunsmith back when he was an innovator. Is his site still up?

[Voltar1]

Well, Gene simply asked which rams were used and hopefully I got em right, but since once again it seems there is some misconception that this is some pioneering or innovative work that could only be found through former members, I'll throw out two links to conversions that have been around far longer than either Mike or Tarheel's efforts. There are more, but the point should be clear.

airgunforum.ca/forums/topic23031.html

Paul, you making me famous here!!!!!! lol

21.5fpe from a .177 springer is pretty fair IMO running conservative pressure as my N2 tank was low at the time.
Need to revisit this.....