Search found 2375 matches

by wyz2285
Mon Apr 27, 2020 5:38 am
Forum: General How-To & Discussion
Topic: Short question topic
Replies: 1463
Views: 84804

Re: Short question topic

Any one could tell me whats these holes on the baffle are for? Like why isn't the hole/cut mirrored? Wouldn't' it cause non uniform turbulence?Image
by wyz2285
Thu Apr 09, 2020 2:46 am
Forum: Off-Topic Hobbies
Topic: "Offtopic-posts-topic" NSFW
Replies: 6619
Views: 241884

Re: "Offtopic-posts-topic" NSFW

Wow, SpaceX! Nicely done! Fortunately and unfortunately, I just love this sport a bit too much and ended up just being an engineer at Novritsch. No regrets though! and thanks for mentioning! Funny enough I was thinking of when I joined the files last night and what were my first posts so I checked i...
by wyz2285
Sat Nov 23, 2019 3:41 am
Forum: General How-To & Discussion
Topic: Short question topic
Replies: 1463
Views: 84804

Re: Short question topic

Balanced vs unbalanced regulators, whats the difference and why one is better than the other?
by wyz2285
Tue Oct 29, 2019 9:55 am
Forum: General How-To & Discussion
Topic: Short question topic
Replies: 1463
Views: 84804

Re: Short question topic

Ahhh, that makes much more sense now. I baffled by the quantity of variables one has to account to build the most efficient spring gun. Thankfully no such things for HPA... Just kidding, I'm still reading that GTA thread, the guys over there are just insane about the efficiency and details...
by wyz2285
Tue Oct 29, 2019 9:32 am
Forum: General How-To & Discussion
Topic: Short question topic
Replies: 1463
Views: 84804

Re: Short question topic

I always thought a light and fast trveling piston is better beacause it compresses air faster, reaching a higher peak pressure before the projectile overcomes the friction. I always imagined the projectile takes some time to start moving no matter how much pressure is behind it, therefore a fast pis...
by wyz2285
Tue Oct 29, 2019 9:16 am
Forum: General How-To & Discussion
Topic: Short question topic
Replies: 1463
Views: 84804

Re: Short question topic

With higher compression I think the heavy piston will match the lighter one maybe even more. Probabaly increase the felt recoil and noise too... I like the feeling of the light piston, but the heavy sounds so good atm plus I'm have 0 variation in FPS. One the lighter piston I don't have such absurd ...
by wyz2285
Tue Oct 29, 2019 8:42 am
Forum: General How-To & Discussion
Topic: Short question topic
Replies: 1463
Views: 84804

Re: Short question topic

Very unfortunalty the spring is pre compressed into different length with the two pistons, the heavier piston is compressing the spring slightly less. Taking that into consideratin, they produce similar power, around 0,2 J less on the heavy. The sould could be duo to the 3D printed cup seal I used o...
by wyz2285
Tue Oct 29, 2019 8:39 am
Forum: General How-To & Discussion
Topic: "boxer" piston spring airgun and balanced valve
Replies: 7
Views: 2465

Re: "boxer" piston spring airgun and balanced valve

So if you make the valve stem length adjustable so the bleed port is half covered, then it's only exposed after the valve has open to a certain depth (AKA the needed dwell), closing the vavle in the right time.
by wyz2285
Tue Oct 29, 2019 8:29 am
Forum: General How-To & Discussion
Topic: Short question topic
Replies: 1463
Views: 84804

Re: Short question topic

Well I experimented with a caron fiber piston and a solid aluminium piston, the lighter one produces almost no recoil but is louder, while the heavy one produce noiceable recoil but is quieter...
by wyz2285
Tue Oct 29, 2019 8:26 am
Forum: General How-To & Discussion
Topic: "boxer" piston spring airgun and balanced valve
Replies: 7
Views: 2465

Re: "boxer" piston spring airgun and balanced valve

So the holy grail is to have the valve close as the pellet extis (or whenevr it's optimal) by adjusting the air flow through the equalization port (pressure raises on barrel side, air flows into the balance chamber at X rate and forces the valve close at Y moment)
by wyz2285
Tue Oct 29, 2019 8:10 am
Forum: General How-To & Discussion
Topic: Short question topic
Replies: 1463
Views: 84804

Re: Short question topic

What if I use a sling shot heavy piston? Could be more consistent since the piston probabaly bounces too.
by wyz2285
Tue Oct 29, 2019 7:41 am
Forum: General How-To & Discussion
Topic: "boxer" piston spring airgun and balanced valve
Replies: 7
Views: 2465

Re: "boxer" piston spring airgun and balanced valve

Nice. Now I need to look into Cobra and SS valves...
by wyz2285
Mon Oct 28, 2019 6:52 pm
Forum: General How-To & Discussion
Topic: Short question topic
Replies: 1463
Views: 84804

Re: Short question topic

Right my bad, the weight of the piston. I was thinking about it while posting and ended up writing too fast...
by wyz2285
Mon Oct 28, 2019 1:35 pm
Forum: General How-To & Discussion
Topic: "boxer" piston spring airgun and balanced valve
Replies: 7
Views: 2465

"boxer" piston spring airgun and balanced valve

I was wondering around piston airguns to see about effects of piston weight and spring length and I found this very interesting build log: https://www.gatewaytoairguns.org/GTA/index.php?topic=25115.0 . The guy attempted to build a dual piston airgun, in which the two pistons are positioned in opposi...
by wyz2285
Mon Oct 28, 2019 7:13 am
Forum: General How-To & Discussion
Topic: Short question topic
Replies: 1463
Views: 84804

Re: Short question topic

Can anyone explain why would increase weight on a spring airgun would increase the muzzle energy?