Login    Register
User Information
Username:
Password:
We are a free and open
community, all are welcome.
Click here to Register
Sponsored
Who is online

In total there are 41 users online :: 5 registered, 0 hidden and 36 guests


Most users ever online was 218 on Wed Dec 07, 2016 6:58 pm

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot] based on users active over the past 5 minutes

The Team
Administrators
Global Moderators
global_moderators.png CS

silent valveless HPA dart launcher

A place to ask general spud cannon related questions.
Sponsored 
  • Author
    Message

silent valveless HPA dart launcher

Unread postAuthor: jackssmirkingrevenge » Tue May 08, 2012 11:45 am

Just thinking aloud here, I'm contemplating a new knife project, not a ballistic knife though which fires off its own blade (painful if you have a jakethebeast<sup>TM</sup> quality blade...) but rather one which incorporates a projectile firing device in the handle.

Something like this beast:

[youtube]http://www.youtube.com/watch?v=wV2s4RvlYcw[/youtube]

... but more compact and definitely not as loud. The design is conceptually identical tothis one.

I calculated 0.4 grams for the delrin pusher piston, at less than 250 fps it should survive the impact at the end of its travel.

The vent could be closed off with a screw to reduce air loss to zero.
  • 0

Attachments
valvelesshpasilentdartlauncher.PNG
valvelesshpasilentdartlauncher.PNG (30.8 KiB) Viewed 1096 times
User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: al-xg » Tue May 08, 2012 12:02 pm

I'd have some sort of vent ahead of the O-ring in extended position, so even if you don't want the propellant volume to leak out, the air in front of the piston wouldn't dampen the initial acceleration too much. But you could still trap some air at the end to cushion the piston impact.
  • 0

User avatar
al-xg
Colonel
Colonel
 
Posts: 643
Joined: Fri Jan 19, 2007 12:29 pm
Reputation: 0

Unread postAuthor: warhead052 » Tue May 08, 2012 12:04 pm

Ohhh pretty! This is pretty much along the same lines of your ballistic knife though, so it should work. The only thing I see going wrong is air compressing past the vent you put in. Unless you can stop the piston just before the vent, its gonna compress the air and possibly mess with the dart's flight. Other than that it looks like it will work.
  • 0


warhead052
Major General
Major General
 
Posts: 1769
Joined: Mon Mar 21, 2011 5:41 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Tue May 08, 2012 12:04 pm

al-xg wrote:I'd have some sort of vent ahead of the O-ring in extended position, so even if you don't want the propellant volume to leak out, the air in front of the piston wouldn't dampen the initial acceleration too much


Of course, I thought I had forgotten something :roll:
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: Brian the brain » Tue May 08, 2012 3:25 pm

Just cheesecake the front section and your fine.
  • 0

Gun Freak wrote:
Oh my friggin god stop being so awesome, that thing is pure kick ass. Most innovative and creative pneumatic that the files have ever come by!

Can't ask for a better compliment!!
User avatar
Brian the brain
Moderator
Moderator
 
Posts: 3494
Joined: Mon Dec 05, 2005 2:06 am
Location: Holland
Country: Netherlands (nl)
Reputation: 29

Unread postAuthor: mattyzip77 » Tue May 08, 2012 5:22 pm

Seriously, that thing is totally fuking awesome!!!
  • 0

Go Bruins!!!!
User avatar
mattyzip77
Donating Member
Donating Member
 
Posts: 1249
Joined: Tue Jun 28, 2011 12:22 pm
Location: Taxachusetts
Reputation: 0

Unread postAuthor: jakethebeast » Tue May 08, 2012 11:55 pm

aaah, this is what you came up with, looks nice :wink: Like a little mosquito :D
  • 0

Est Sularus Oth Mithas
User avatar
jakethebeast
Brigadier General
Brigadier General
 
Posts: 934
Joined: Sat Jul 03, 2010 4:20 pm
Location: Jakes cave
Country: Finland (fi)
Reputation: 11

Sponsored

Sponsor
 


Unread postAuthor: jackssmirkingrevenge » Wed May 09, 2012 12:13 am

hehe imagine two of these strapped together, with a blade in between...
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: HunterT » Wed May 09, 2012 1:17 am

jackssmirkingrevenge wrote:hehe imagine two of these strapped together, with a blade in between...


that would make even the "saltiest" Spetsnaz troops fap... :D
  • 0

User avatar
HunterT
Staff Sergeant
Staff Sergeant
 
Posts: 113
Joined: Wed Jul 07, 2010 9:46 pm
Location: Just east of Russia
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Wed May 09, 2012 1:43 am

HunterT wrote:that would make even the "saltiest" Spetsnaz troops fap... :D


... making them even saltier!

:D :D :D
  • 0

User avatar
jackssmirkingrevenge
Donating Member
Donating Member
 
Posts: 24225
Joined: Thu Mar 15, 2007 11:28 pm
Country: Holy See (Vatican City State) (va)
Reputation: 66

Unread postAuthor: HunterT » Wed May 09, 2012 2:03 am

jackssmirkingrevenge wrote:
HunterT wrote:that would make even the "saltiest" Spetsnaz troops fap... :D


... making them even saltier!

:D :D :D


:D
  • 0

User avatar
HunterT
Staff Sergeant
Staff Sergeant
 
Posts: 113
Joined: Wed Jul 07, 2010 9:46 pm
Location: Just east of Russia
Reputation: 0

Return to General Spud Cannon Related

Who is online

Registered users: Bing [Bot], Google [Bot], Google Adsense [Bot], MSNbot Media, Yahoo [Bot]

Reputation System ©'