Homebuilt airguns

[sb327]

It’s a mechanical pilot valve integrated into the main poppet. It dumps the air on one side of the larger end of poppet (it uses this dumped air for semi action). This blows main poppet open and the refill of the dumped chamber controls dwell.

Dave

 

[Fatmike]

I'm really liking the hammerless design of the huben and lcs sk19. I think this is a easier way to get rid of hammer issues and still produce great power. I have a marauder that doesnt have many stock parts on it. It was an affordable proven platform to tinker with. I've modified it with aftermarket used parts so I'm not in too deep financially. Not many parts vendors still in business for marauders. Maybe that's an avenue you would like to go down. Create some parts for a platform that many have left behind but also many are just starting with.

 

[aldea6]

I'm really liking the hammerless design of the huben and lcs sk19. I think this is a easier way to get rid of hammer issues and still produce great power. I have a marauder that doesnt have many stock parts on it. It was an affordable proven platform to tinker with. I've modified it with aftermarket used parts so I'm not in too deep financially. Not many parts vendors still in business for marauders. Maybe that's an avenue you would like to go down. Create some parts for a platform that many have left behind but also many are just starting with.

That's a very good idea ; for concept testing it would be better to use some existing parts ant try to put them together , rather than machining all from scraps . I already thought using a barrel from a springer , 'cause I don't need any port in it and there is a seal already fitted at the breech.....

 

[shelly_25]

I’ve built quite a few trying different valve designs. My avatar is a home build where the main poppet sits directly behind the slug. The main poppet is controlled by a much smaller pilot poppet struck by a hammer that requires around 5lbs to cock. It has been tested (quite a bit) with 4500psi and functions as designed.

Obviously it is inspired by the L2 (in many ways).

And a couple others (not quite as finished).

I too wish there were a dedicated place here for the home builder/designers.

DaveView attachment 324474View attachment 324475View attachment 324476

I’ve built quite a few trying different valve designs. My avatar is a home build where the main poppet sits directly behind the slug. The main poppet is controlled by a much smaller pilot poppet struck by a hammer that requires around 5lbs to cock. It has been tested (quite a bit) with 4500psi and functions as designed.

Obviously it is inspired by the L2 (in many ways).

And a couple others (not quite as finished).

I too wish there were a dedicated place here for the home builder/designers.

DaveView attachment 324474View attachment 324475View attachment 324476

FX Impact scan

Shelly, you are Amazing my friend. A "Thank You" is sooo not enough for your fantastic contribution here. I have enjoyed your posts from the beginning and am glad you have continued to produce such stunning graphics for all of us here to fully appreciate. You Rock. Period. Patrick Thank you...

www.airgunnation.com

 

[MadCowCrazy2]

I have been building a few things in cad (unlimited size magazine for Hatsan Blitz, unlimited suppressor and remote controlled shooting platform) these past few weeks. One thing I've been thinking about is making an airgun designed to test pellet accuracy.
It's basically a really thick smooth barrel that's about 700-1000mm in length, the end is threaded so you can screw on rifled barrel lengths.
The idea is to create a testing rifle that works like the FX smooth twist barrels except you can swap the twist rate. I'm wondering if it would be possible to create a commercial product where you have a smooth barrel and screw on a twist rate barrel onto it. A rifle with a system like this would be very specialized for people who swap between pellets and slugs for some reason.

I contacted Loathar Walter about getting a barrel made but I think 700mm was the max they could provide. How long should the twist rate barrels be? Is 10cm (4") long enough for the pellet/slug to adapt the twist rate? Since they are screw on it increases the barrel length, so a thick blank 700mm is probably too long?
Pellets want slower speeds and slugs want faster speeds as far as I know.

Complete waste of time and money? or what would be the best way to test the potential performance of airgun ammo? Try 100 000 rounds in every single rifle on the market? Even this doesn't work as one batch might be different from another from the same manufacturer. So completely pointless endeavor then?

How many rounds do you guys think should be shot before a good baseline for that ammo is acceptable? 1000? 2500? 5000? 10k? more??
I a youtuber was reviewing ammo, how much ammo should be shot to show the potential of the ammo if the airgun used was built like the above one?
A super heavy airgun, bolted down on a table using an electric trigger and digitally controlled aiming. Basically 100% of the human factor is removed from the shooting process except for initial settings.

On another note something I'd like to see is a .50 cal break barrel rifle (for pellet/slug/arrows), not because it would be good for anything but just to see how far you can push it and still perform acceptably.
Maybe instead of breaking it you would use a pulley system for crossbows to cock the piston/spring?

 

[patrikky]

Anyone ever seen this one before?

 

[JP806TX]

View attachment 324531

Mr. Oz
I don't know if you know about the Norica Omnia. It's a recoilless gas ram/ break barrel from Spain. Do you have any interest in making something like that to house either a R9 action or a TX200 action?