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 61 users online :: 4 registered, 0 hidden and 57 guests


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

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

The Team
Administrators
Global Moderators
global_moderators.png CS

Rocket initiated hybrid... non pyrotechnic

Post questions and info about hybrid (compressed gas with fuel) powered cannons here. This includes discussion about fuels, ratios, ignition systems, build types, safety, and anything else relevant.
Sponsored 
  • Author
    Message

Rocket initiated hybrid... non pyrotechnic

Unread postAuthor: steven_main » Sun Oct 28, 2012 11:31 pm

Ok my original idea was in violation of forum rules and I was unaware of this.

So... 4000 ft/lb hyrbid cannon launching a projectile which is also a rocket... a 12 ounce projectile could travel 750 meters from proposed gun and if I created say for a forum safe hypothetical example a mythical c02 rocket with 25 lbs of peak thrust and 137newton meter total impule what kind of range could be obtained?
This is definitely a remote fire situation!
  • 0

Last edited by steven_main on Mon Oct 29, 2012 12:01 am, edited 3 times in total.

steven_main
Private First Class
Private First Class
 
Posts: 25
Joined: Thu Oct 25, 2012 8:02 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Sun Oct 28, 2012 11:35 pm

Unfortunately as cool as that project would be it is beyond the scope of the discussion on this forum:

The Rules wrote:Discussion of solid propellants, explosive devices or incendiary projectiles fired specifically from a spud cannon is prohibited, and may result in a permanent banning of your account.For the purpose of this forum, these definitions will be used:

Solid propellant: Any substance containing all the chemical elements required to enable sustained combustion without the presence of additional oxidizers. This includes but is not limited to gunpowder, thermite, and many commercial and/or homemade pyrotechnic compounds.
For this purpose, nitroglycerine, though liquid, would qualify.
For this purpose, ordinary flour, though solid, would not qualify.
Explosive device: Any device that has the capability to release large amounts of stored energy rapidly.
Discussion of fireworks as projectiles is prohibited.
Discussion of "soda bottle bombs" or any other similar devices that may cause shrapnel as a result of uncontrolled rupture is prohibited.
Incendiary projectile: Any projectile that is capable of producing flame.
Rocket propelled projectiles, pyrotechnic smoke bombs, or any other burning projectiles would qualify as an incendiary projectile.
  • 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: steven_main » Sun Oct 28, 2012 11:50 pm

is this edit Kosher? Is it a legal requirement or something? I can understand not wanting to give potato launchers a bad name... too much negative press and the fed would step in and ruin a fun healthy hobby.
  • 0


steven_main
Private First Class
Private First Class
 
Posts: 25
Joined: Thu Oct 25, 2012 8:02 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Mon Oct 29, 2012 12:39 am

Conversely, the hybrid blast could be used to initiate the projectile.

You'll definitely get a performance boost, it's the same logic behind the Raketenwerfer 43.

Image

Sealing a finned projectile in a barrel needs to be catered for too.
  • 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: steven_main » Mon Oct 29, 2012 12:54 am

Im just looking for all out range and hang time, nothing else. the gun I had launched inert PVC "rockets" to 400 meters and 16 second hang time.
This was as regular combustion only. I downloaded the hybrid gun design tool and found my 4 ounce projectiles weren't nearly heavy enough and also performed a modifcations to convert to hybrid. at 2 X however the 7 liter pvc combustion chamber detonated in my chest while shoulder firing... according to hgdt this cannon would have launched 12 ounce rockets to 750 meters. The new cannon will be iron pipe and I would like to incorporate this hypothetical c02 rocket into the projectile to possibly hit the one mile mark...... 1600 meters!!!
  • 0


steven_main
Private First Class
Private First Class
 
Posts: 25
Joined: Thu Oct 25, 2012 8:02 pm
Reputation: 0

Unread postAuthor: jackssmirkingrevenge » Mon Oct 29, 2012 12:57 am

If you want extreme range, projectile optimisation should suffice without the need for a boost.

Have a look through this rather long thread, plenty of ideas: http://www.spudfiles.com/forums/spudgun ... 22491.html

There is some discussion of boosted projectiles too.
  • 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

Return to Hybrid Cannon Discussion

Who is online

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

Reputation System ©'