Technical information

Practical A.E.G Upgrade 2006

Is 8.4V insufficient for an upgraded mechbox?

Does battery size matter?

Is battery power important for semi-auto firing?

The correct voltage on which a motor is required to operate is critical. Every

motor model is unique. Different models have different operating characteristics.

In general, a 5% decrease in voltage can often translate into a 10% decrease in

motor torque.

When you equip your mechbox with a harder spring, you want to ensure that the

motor has sufficient power to start the load. We cannot, however, just look at the

voltage level. Battery size (and its corresponding mah value) is another major

factor to consider. A real life example: a 8.4V GP 3300mah battery can easily

beat a 10.8V Sanyo 600mah battery in terms of power output.

We will talk about battery in further details later, for now you need to know that

a 8.4V high mah battery (such as a GP 3300) is more than enough to drive a

M120 upgraded mechbox (unless you are using EG560 ... refer to the next

section for more information).

Many people believe that battery power does not matter in semi-auto, that as

long as the motor has enough power to pull the piston then a shot can be

satisfactorily completed. This concept is totally wrong. As said before, a gun’s

FPS is partly determined by how fast and powerful the piston is moving forward.

With enough battery power, the motor can afford to pull the piston and the

spring fast and hard. In return, the spring will be much more powerful in its

“return movement” and will push the piston much harder. High FPS in

semi-auto requires significant horse power from the motor (and the

battery).