... about my sibling? behind my back?! *gasp*jrrdw wrote:and to a few chat conversations lol.
TBMA-230 V2.0
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jackssmirkingrevenge
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hectmarr wrote:You have to make many weapons, because this field is long and short life
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SpudBlaster15
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Probably around 6RPM if the chamber is vented between shots. Venting alone takes about as much time as the rest of the process.ramses wrote:What is the maximum ROF of this system, without loading projectiles? I can't imagine it would take more than about 5 seconds per shot!
Leaving the post combustion atmosphere in the chamber would likely bump the maximum ROF up to 10-12RPM, at the cost of some power.
People should not be afraid of their governments. Governments should be afraid of their people.
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jackssmirkingrevenge
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With cartridges on the other hand...
*ahem*
*ahem*
hectmarr wrote:You have to make many weapons, because this field is long and short life
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SpudBlaster15
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When somebody figures out how to effectively mass produce and transport 80in<sup>3</sup> hybrid cartridges, let me know.jackssmirkingrevenge wrote:With cartridges on the other hand...
*ahem*
People should not be afraid of their governments. Governments should be afraid of their people.
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POLAND_SPUD
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@SB15
can't you use a mechanical spring instead ?
and purge teh chamber with compressed air ?
can't you use a mechanical spring instead ?
and purge teh chamber with compressed air ?
Children are the future
unless we stop them now
unless we stop them now
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SpudBlaster15
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The chamber is purged with compressed air, but it's not an instantaneous process.POLAND_SPUD wrote:@SB15
can't you use a mechanical spring instead ?
and purge teh chamber with compressed air ?
A 3-5 second burst from an air compressor was sufficient for my original design.Not sure where you're suggesting the use of a mechanical spring...
People should not be afraid of their governments. Governments should be afraid of their people.
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POLAND_SPUD
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well it would use less air per cycle. though I guess it's better to keep the system as it isNot sure where you're suggesting the use of a mechanical spring&A 3-5 second burst from an air compressor was sufficient for my original design
ohh btw I really really like the way you designed it...
after the shot the main valve is in open position so you can purge it, but as soon as you switch the DCV to the first position (fuelling) the main valve closes
Children are the future
unless we stop them now
unless we stop them now
Excellent streamlining operation, SB15. The use of a 5-way for air and fuel is a great touch... Sgort would be proud. 
Glad to see another person realizing pneumatics aren't the only place to apply such technology.
Glad to see another person realizing pneumatics aren't the only place to apply such technology.-
jackssmirkingrevenge
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A multishot means you don't need as much power, think submachinegun vs shotgun, so cartridges could be significantly smaller...SpudBlaster15 wrote:When somebody figures out how to effectively mass produce and transport 80in<sup>3</sup> hybrid cartridges, let me know.
hectmarr wrote:You have to make many weapons, because this field is long and short life
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pneumaticcannons
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whu whu whu what?Gun Freak wrote:I didn't think that was very funny. This cannon is pretty kick ass and I never at all hinted at the superiority of a pneumatic version.
ramicaza <- My Youtube Channel
You all are under the wrong impression... I don't think hybrids are stupid, I just don't want to build one. That's all... I'm aware of the power differences between pneumatic and hybrid...
OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna" ■ M16 BBMG ■ Pengun ■ Hammer Valve Airsoft Sniper ■ High Pressure .22 Coax
Holy Shat!
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna" ■ M16 BBMG ■ Pengun ■ Hammer Valve Airsoft Sniper ■ High Pressure .22 Coax
Holy Shat!
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SpudBlaster15
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So I went to go test this launcher the other day, and I quickly realized that despite the modifications I had made, it was still too long for my current transportation situation. That's when I decided to change a few more things around.
Firstly, the barrel is now 48" long, which should improve portability and reduce the deflection/elastic deformation caused by recoil. Muzzle energy is estimated to be around 3000ft-lbs (~4000J) with an 80g projectile at an 8X mix.
Secondly, I had an industrial supply outlet custom make a 2"x12" SCH40 galvanized steel pipe nipple to replace the stupid looking coupled setup on the previous version. This significantly increases the strength of the chamber, and also eliminates two potential leak pathways.
Thirdly, I repositioned the ball valve to mount directly to the chamber, which increases the meter volume (Calculated meter pressure is now ~8PSI/X), and isolates several threaded joints from the combustion pressure. As of now, there are only 8 connections which will be exposed to high pressure upon firing; this is a massive improvement over the 16 found on the TBMA V1.0.
Fourthly, MOAR push-to-connect fittings, which should cause POLAND_SPUD to [redacted in an attempt to maintain G rating of forum].
Fifthly, the pictures:
The new configuration allows for a more comfortable firing position:
Videos will be posted when I find some interesting targets to demolish.
Firstly, the barrel is now 48" long, which should improve portability and reduce the deflection/elastic deformation caused by recoil. Muzzle energy is estimated to be around 3000ft-lbs (~4000J) with an 80g projectile at an 8X mix.
Secondly, I had an industrial supply outlet custom make a 2"x12" SCH40 galvanized steel pipe nipple to replace the stupid looking coupled setup on the previous version. This significantly increases the strength of the chamber, and also eliminates two potential leak pathways.
Thirdly, I repositioned the ball valve to mount directly to the chamber, which increases the meter volume (Calculated meter pressure is now ~8PSI/X), and isolates several threaded joints from the combustion pressure. As of now, there are only 8 connections which will be exposed to high pressure upon firing; this is a massive improvement over the 16 found on the TBMA V1.0.
Fourthly, MOAR push-to-connect fittings, which should cause POLAND_SPUD to [redacted in an attempt to maintain G rating of forum].
Fifthly, the pictures:
The new configuration allows for a more comfortable firing position:
Videos will be posted when I find some interesting targets to demolish.
Last edited by SpudBlaster15 on Fri Dec 23, 2011 4:24 pm, edited 1 time in total.
People should not be afraid of their governments. Governments should be afraid of their people.
Way to push the gas cylinder up against your bicep
OG Anti-Hybrid
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna" ■ M16 BBMG ■ Pengun ■ Hammer Valve Airsoft Sniper ■ High Pressure .22 Coax
Holy Shat!
One man's trash is a true Spudder's treasure!
Golf Ball Cannon "Superna" ■ M16 BBMG ■ Pengun ■ Hammer Valve Airsoft Sniper ■ High Pressure .22 Coax
Holy Shat!
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Lockednloaded
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I'm not much of a DCV guy, but couldn't a hybrid be fueled using only a 3/2 way and two regulators?
I love lamp