Battery killed by a AEG

[Spa]

I was just assigned to work on a gun because it apparently drains the battery after 100-200 shots. (semi and full auto don't matter, if you ask).

So multipile tests have been done such as: Different types of batteries, Different types of chargers, Different types of mAh, etc.

Yet no conclusive results have been determined.

Some things you may want to know, there is no fuse but tinfoil in its place (as i have no idea if this will affect the charge loss).

MY theories are that: shims job is so tight it forces to motor to its limits draining the battery, motor just sucks or the spring is to much for the gun to handle.

In terms of gun upgrades I have been told that it has stock CA internals, other then a upgraded spring guide and a systema M120S(yet the guy who asked the question is not to sure on the spring).

The gun is a M15 FYI.

Just wondering what everyone has for solutions, things to look for or tests to conduct to solve this problem.

Thank you for your time, consideration and help!

Spa

[ThunderCactus]

Always a good idea to check shimming, you should bridge the fuse with something a bit better than tinfoil, like say a metal rod, or a fuse lol
It could be the motor, if you have a spare motor try it.
With M120 spring it's always a good idea to have torque up gears, not only is it easier on the motor but it reduces the amount of power required to function.
Thats all I got lol

[REX FERAL]

I would try taking that tinfoil out,
join up the wires striaght thru or use a fuse.
all the tinfoil will do is make a high resistance and heat up so you are losing capacity due to a unwanted load .
( the tinfoil becomes a little heater )

[mcguyver]

I've used the M120S a couple of times and the guns ended up shooting near 450 fps. This load, coupled with the gear ratio of stock Classic Army gears would be very high for that motor. Higher load = more current required from you battery. It's also good to note that past a certain point, all motors will start to lose efficiency greatly, and they will require huge increases in current for small increases in load.

Put a lighter spring in there and use a DC current clamp to measure current drawn by a motor. Put the fuse back in. If it blows, you know the load is too high. Tinfoil on a fuse is just retarded and dangerous.

[specter_M4]

Try re-shim the gears then close and tighten up the box with only the gears inside. If you can spin the gears with your pinky then your golden. Use your own judgment and adjust accordingly. I personally would never use an m120 spring. IMO It is way to much strain on everything. I have only had trouble with heavy springs. Gears and pistons wearing down. I would spend the extra money and go efficiant. Go with a pdi 130% or 140% spring and make up the extra fps with extra internals. My g36 had a 140% spring in it and shot at 400 FPS everytime with these simple internals and not to mention your ROF will increase majorly.

As for your problem I would agree with everyone on #1 taking the tin foil out and use a proper fuse. Next try the shimming. And then if worst comes to worst its the motor. Or hell maybe its just cursed

[Zekk05]

Thank you everyone for your support before I begin on this project.

I never dealt with a gun that drains batteries before so this info will help my progress for a solution much quicker!

I will update everyone within several days once i receive the AEG and begin testing.

Thank you again and cheers!

Spa

[mrsmellybelly]

May i ask where the gun was upgraded at? The problem with my gun when it was upgraded was that i THOUGHT i was getting a systema m120, when really i got some other brand called "modify" m120 put in my gun. It chronos at 425....systema at around 360. Seeing as i dont have chrono, i didnt know and went through tons of batteries before figuring out my gun was shooting THAT hard. Now i use 11.1v lipo, it fixed it ;0

BTW the gun was draining 8.4v intellects and 9.6vs left and right no problem. Only about 200 shots each and they were done. And my shimming was perfect, just an insanely tight spring.

[Dynamo]

Originally Posted by mrsmellybelly

May i ask where the gun was upgraded at? The problem with my gun when it was upgraded was that i THOUGHT i was getting a systema m120, when really i got some other brand called "modify" m120 put in my gun. It chronos at 425....systema at around 360. Seeing as i dont have chrono, i didnt know and went through tons of batteries before figuring out my gun was shooting THAT hard. Now i use 11.1v lipo, it fixed it ;0

BTW the gun was draining 8.4v intellects and 9.6vs left and right no problem. Only about 200 shots each and they were done. And my shimming was perfect, just an insanely tight spring.

what brand, size and mah is your LiPo?
(sorry for the quick hijack)

[Spa]

I think a guy did it for another guy. No real placement.

So, for the update, The srping was putting to much load on the motor causing the wires to overheat and blowing the fuse and in turn the tin foil would continue to overheat the system thus draining the battery.

I put a weaker spring in and the fuse is not blowing any more.

Problem solved:P Solutions: IF you get a stronger srping, get the torque gears/ high torque motor to back it up.

Cheers,

Thank you all for the help

[mrsmellybelly]

Originally Posted by Dynamo

what brand, size and mah is your LiPo?
(sorry for the quick hijack)

11.1V 3C Intellect/Sanyo 1800 maH. Got it from airsplat.com with charger. My gun shoots around 430 fps and i get a sick rate of fire.

[DYORD]

first.. check your shimming.. next.. you might need to replace your battery to a higher voltage and mah.. Your battery might be too weak for your stiff spring.

[arman]

Originally Posted by Spa

I think a guy did it for another guy. No real placement.

So, for the update, The srping was putting to much load on the motor causing the wires to overheat and blowing the fuse and in turn the tin foil would continue to overheat the system thus draining the battery.

I put a weaker spring in and the fuse is not blowing any more.

Problem solved:P Solutions: IF you get a stronger srping, get the torque gears/ high torque motor to back it up.

Cheers,

Thank you all for the help

I purchased a gun from the used section and it was likking my battery like that also...i switched the spring and fixed it... kinda thought that was the real problem needed hi torque gears...