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Posted 07-17-2019 9:57:51 AM
Tall triggers vs Short triggers Which is better?
 

If you've searched for upgrades for your airbrush, by now you might have noticed that some companies are selling a "tall trigger upgrade." There's a lot of reasons why this might sound like a good idea.

First of all, a taller trigger gives you a greater mechanical advantage, or "leverage." In other words, you can pull the needle backwards with more force with a taller trigger.

Secondly, a taller trigger travels further to move the needle, which creates more distance or "throw" to control the paint. In theory, a greater degree of throw means a higher number of incremental movements for the needle resulting in more precision. Airbrush Texture Stencils  

However, there are two problems with this. One, extra force is not necessary when operating an airbrush trigger. There is no need to have more force, because the airbrush needle is easily moved. Two, a taller trigger travels further, requiring more distance to move the needle the same amount, which requires more work.  The movement requires the long extensor tendon which is connected to muscles in the forearm to control the trigger. This is considered a relatively gross motor movement because it lacks precision and finesse.

Although creating detail doesn't require this much movement, the muscles used with this finger position require muscles located on the forearm which are connected to the finger by long tendons.

Shorter?

Instead of using a taller trigger, what if we used a shorter trigger? With a shorter throw, less work is required, and the fingertip can be utilized to control the airbrush rather than the forearm muscle. The fingertip is controlled by muscles in the palm and use a much more  precise fine motor movement.

A different finger position is possible with the shorter trigger. If the first joint of the index finger is placed over the trigger, then the tip of the finger can pivot up and down to move the needle back and forth with much greater precision than the forearm muscles.

The concept of short throw is not new. Many race cars use short throw shifters for greater efficiency when shifting. The shorter trigger enjoys greater efficiency of movement, and more control of the airbrush when held in the position above. Airbrush Training Courses

The potential drawback of using the short trigger with this finger position is that it cannot accommodate top-mounted cups, because the tip of the finger collides with the cup. For top-mounted airbrushes, little benefit can be gained by the shorter trigger.


 
  
 
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