RT Chronograph Procedure
Airgun Designs - Automag RT Chronograph Procedure
PLEASE READ THIS CHRONOGRAPH PROCEDURE CAREFULLY
BEFORE USING YOUR AUTOMAG RT™!!!

The AUTOMAG RT has a new, fast recharging regulator not found on any other paintball marker. There are certain characteristics that you should understand about this regulator before you chronograph your RT.

The RT's regulator recharges so quickly (up to five times faster than the 68AUTOMAG) that friction heats up the compressed air molecules filling the chamber. The temperature in the air chamber can get as high as 180 degrees and can make the front of the gun warm after a string of shots. It is important to understand that when the air chamber is filled with hot air under pressure, it cools off rapidly over several seconds. This cooling will reduce both the chamber pressure and the velocity.

If you fire the RT while the air chamber is hot (high pressure) your velocity will be higher. If you wait, the air chamber will cool and velocity will drop noticeably. The faster you fire your RT the more consistent your velocity will be.

QUICK SETUP AND CHRONOGRAPH PROCEDURE FOR YOUR AUTOMAG RT

  1. Set the pressure going into the RT to 700 psi.
  2. To record your highest rapid fire velocity:-
    • Fire a paintball and hold the trigger back.
    • Then release the trigger completely, and fire the next paintball as quickly as possible, once again holding the trigger back.
    • Repeat as necessary.

This procedure will simulate rapid fire, thus recording your highest possible rapid fire velocity.

PLEASE NOTE: The AUTOMAG RT is sensitive to differences in trigger release, so always attempt to be consistent with your trigger finger!

FURTHER DETAILS ABOUT SETUP AND CHRONOGRAPH PROCEDURE

The AUTOMAG RT, like any manufactured product, will vary a bit from one RT to the next. Our testing shows that the best input pressure for each RT will be somewhere between 650 and 750 psi. This is why we recommend 700 psi as a starting input pressure.

Higher input pressures will make the trigger more reactive, but the velocity will drop off more when fired slowly.

Lower input pressures will reduce the reactive trigger and may cause slight shoot down on rapid fire, but the RT will be more consistent over the chronograph when fired slowly.

As you can see, the AUTOMAG RT can be adjusted to suit your preferences and style of play. We hope this information provides you with some insight on the best methods for setting up your RT and giving your game the performance edge.

Airgun Designs is committed to bringing you the highest performance products possible. The AUTOMAG RT was designed to be (and is) the world's fastest shooting paintball marker! The RT performs best when fired rapidly, much like a high performance racing engine that runs best at high rpms but doesn't idle well. After thousands of computer gun test runs and dozens of regulator variations, we feel that the AUTOMAG RT represents the best balance between outstanding rapid fire performance and stability over the chronograph.

sincerely,
Tom Kaye
President, Airgun Designs

See the following for technical details on AUTOMAG RT
velocity and regulator function.

TECHNICAL DATA FOR EXPERIENCED AIRSMITHS

The velocity fluctuations in the RT are caused by the temperature changes of the compressed gas in the air chamber. Temperature-related pressure profiles will have different characteristics depending upon input pressure. The graphs below show how chamber pressure changes over time.
This page contains more technical data to help you understand what is going on inside the RT and to help you make the RT perform to your style of play.
Notice that the high input pressure graph peaks high, goes into a dip, and then levels off. When the gas cools, regulator opens up and maintains a steady pressure. After 0.5 seconds the pressure has stabilized.

When firing at a rate of 2 shots per second or slower, the RT will maintain consistent velocities.
When shooting at a rate of 3 shots per second or faster, the velocity will be closer to your maximum rapid fire velocity, as set with the quick shot test. Higher input pressure also gives a stronger Reactive Trigger. When chronographing at high input pressures, a rapid fire shot (as described earlier) will be higher than a shot fired after a ten second wait.
In the medium input pressure graph you will notice a peak followed by a dip and then a gradual climb back to your rapid fire pressure. The peak is where the temperature of the gas is at its highest.
This is where your rapid fire pressures (velocities) will be seen. When shooting at your maximum rate, you will be shooting the same velocity as when you wait 10 seconds, or more, and take another shot.
If you are shooting at a rate lower than your maximum, you will notice lower velocities. This is where the graph is falling to its lowest point (labeled "dip" on the graph). Here the gas is cooling, and the regulator has not opened back up. After this point, the regulator opens back up and the chamber pressure begins to climb back to your rapid fire pressure. This input pressure range is for the player who combines rapid firing with an occasional sniper shot. This will also give a positive Reactive Trigger feel. When chronographing at medium input pressures, a rapid fire shot (as described earlier) and a shot after a ten second wait will be similar.
On the low input pressure graph, notice that the peak and dip pressures in the first second are lower than the pressures after 1 second. This means that all shots spaced less than 1 second apart will be at lower velocity than shots spaced longer than 1 second apart. At lower input pressures, all benefits of the fast recharge regulator diminish and the regulator acts like the regulator on a 68AUTOMAG. The main advantage is that this setup is more consistent over the chronograph where shots are at least one second apart and may benefit a "sniper" player concerned with consistent slow shots. Lower input pressure also weakens the Reactive Trigger. When chronographing at low input pressures, a rapid fire shot (as described earlier) will be lower than a shot fired after a ten second wait.

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