Difference between revisions of "Launcher configuration"

 
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== Chamber-Barrel position ==
 
== Chamber-Barrel position ==
The possibilities are limmetless, but these are the most common ways to position the chamber and barrel:
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The possibilities are limitless, but these are the most common ways to position the [[chamber]] and [[barrel]]:
  
* "linear"
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*[[Linear]] or inline
The barrel is directly infront of, and pointing in the same direction as, the chamber. It's slightly cheaper than the over/under configuration, but only by the cost of 2 90* elbows.
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*[[over/under]]
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*[[co-axial]]
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*[[multiple tanks and T's]]
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Like the setup used on the [http://www.spudtech.com/images/products/mega-II-ov2.jpg megah-launcher]. However, the multiple bends results in slightly reduced flow. [[GGDT]] simulations typically don't show much improvement from the increased chamber volume.
  
* "over/under"
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== Projectile delivery ==
The barrel is turned 180* (using 2 90* elbows, typicaly) so that it points in the oposite direction of the chamber, and is directly over it. This makes the total launcher length shorter, although the 90* bends will slightly reduce flow.
 
Barrel suports are recomended to re-enforce the launcher, and keep the barrel steady.
 
  
* "[[co-axial]]"
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* [[Muzzle loading]]
The barrel is placed inside the chamber. This is made possible by [[bushing modification|modding]] the reducing bushing, allowing the pipe to be glued in it backwards. This makes a rather nice looking launcher, and is most commonly used when constructing a [[diaphram valve|diaphram]] or [[piston valve|piston]] valve, which requires the part near the valve to be co-axial anyway. It can be a pain to vent and mix the combustion products/fuel if you make a co-axial combustion.
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The basic option. Projectile loads from the front, and reload time is quite slow. If there's any significant friction between the projectile and barrel, a ramrod must be used to push the projectile down the barrel.
  
* "multiple tanks and Ts"
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* [[Union]] loading
Like the setup used on the megah-launcher. However, the multiple bends results in lower flow. The [[GGDT]] typicaly doesn't show much improvment from the increased chamber volume.
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A step up. Allows you to load the projectile from the breech, but requires alignment and twisting afterwards. A union can also hold a [[burst disk]]. [[Camlock coupling]]s are similar to unions, but faster to open and close. They are usually rated for less [[pressure]] than unions.
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* [[Breech loading]]
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Allows you to load a projectile from the breech (end of gun towards user). Mechanism and loading time varies by construction technique.
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* [[Vogt-pattern]]
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A tube holds the [[ammo]], about around half a dozen balls. Upon firing, the balls are sucked one-by-one into the airflow, resulting in a tight grouping of balls fired a few dozen milliseconds apart. Suitable for large-caliber weaponry (has been tested with as large as [http://www.spudfiles.com/spudtech_archive/viewtopic.php?t=11012 tennis balls]) Named after the late [[Bill Vogt]], who came up with the design.
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[[category:Concepts]]

Latest revision as of 12:37, 4 June 2008

Chamber-Barrel position

The possibilities are limitless, but these are the most common ways to position the chamber and barrel:

Like the setup used on the megah-launcher. However, the multiple bends results in slightly reduced flow. GGDT simulations typically don't show much improvement from the increased chamber volume.

Projectile delivery

The basic option. Projectile loads from the front, and reload time is quite slow. If there's any significant friction between the projectile and barrel, a ramrod must be used to push the projectile down the barrel.

A step up. Allows you to load the projectile from the breech, but requires alignment and twisting afterwards. A union can also hold a burst disk. Camlock couplings are similar to unions, but faster to open and close. They are usually rated for less pressure than unions.

Allows you to load a projectile from the breech (end of gun towards user). Mechanism and loading time varies by construction technique.

A tube holds the ammo, about around half a dozen balls. Upon firing, the balls are sucked one-by-one into the airflow, resulting in a tight grouping of balls fired a few dozen milliseconds apart. Suitable for large-caliber weaponry (has been tested with as large as tennis balls) Named after the late Bill Vogt, who came up with the design.