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Myth Busters: Does more voltage give more power? (2009-02-27)

Fact or Fantasy: Does more Voltage give more Power?

To find the answer to the long debated question: "Does more Voltage mean more Power"? we here at Redwolf have performed a series of tests to find out if increasing the voltage really does increase your power output, read on to find out more!

To test this theory we have brought out 2 AEGs, the long inner barreled G&P M5 RAS and a short inner barreled G&P Tank; to ensure that our guns remain in good working condition, we were only allowed to use an 8.4V and 9.6V battery! Firstly we chronoed the muzzle velocity of the short barreled "Tank" using 0.20g BBs on the lower powered, 8.4V Ni-MH battery.

NOTE: we used the same brand of battery for all tests to keep the results as consistent and fair as possible.
Next we chronoed the "Tank" again using the same setup, except with a higher voltage 9.6V NI-MH battery.
Before we show you the results, let's take a moment to review several theories as to why this phenomenon may occur. The first one is that since a higher voltage increases the rate of fire, the piston's inertia causes it to fly back, compressing the spring for that tiny bit extra to give the forward stroke a little more oomph. The counterpoint to this theory is that if you have ever tried to compress the spring from an AEG you'll know that it's very strong, and makes this an unlikely cause to this phenomena.

The alternate theory says that a faster backstroke sucks more air into the cylinder before the piston's forward stroke, thus moving a greater mass of air on through the nozzle and propelling the BB faster. But it can also be argued that the faster backstroke will have the opposite effect, by causing a slight vacuum of air in the cylinder and thus pushing a lower mass of air through the nozzle.

Now onto the results:
These are the results for the power test on the short barreled "Tank"

8.4V Ni-MH 9.6V Ni-MH


2 265 263
3 262 264
4 258 266
5 264 258
6 266 267
7 263 265
8 265 265
9 261 265
10 262 263
Average 262.9 264.1

The percentage change from the power at 8.4V to 9.6V was only 0.46%
This is a statistically negligible percentage change and thus this goes to show that on short barreled guns, increasing your voltage will not increase your FPS.

8.4V Ni-MH 9.6V Ni-MH


2 372 371
3 370 371
4 373 371
5 368 369
6 368 369
7 365 368
8 365 363
9 367 368
10 363 366
Average 367.8 368.5

The results here concur with the short barreled results; the percentage change was only 0.19% which clearly shows that the connection between voltage of the battery, and muzzle velocity of the Airsoft gun is nonexistent or negligible at best. I think we can safely say that this myth is BUSTED!