Trigger response time VS. spring load VS. battery size.

[Hedonism Bot]

I finally threw a real battery into my M14 (8.4V Elite 4500) And while I was impressed with the trigger response with the old temp. battery (7.2V 2200) with the new battery the delay between pulling the trigger and the cycle is almost at GBB levels, ie there is no perceptible delay.

I plan to add a slight upgrade spring in the coming days. prob. an SP90 or 100. To the best of your knowledge will I experiance a drop in trigger response?

Thanks

[LUTNIT]

I haven't run an 8.4V but with a 9.6V 4200mAh pack I have no trigger delay with an SP110 spring in my G36 (deans connectors throughout, reduces resistance.) Higher capacity packs output a higher amperage so the motor can draw its maximum potential for the maximum speed. Your rate of fire probably went up quite a bit too I assume?

[ILLusion]

You shouldn't experience much of a drop, if any at all. If you run a battery that big, your boosted rate of fire could potentially strip your piston if you fire a lot in full auto.

Be careful.

With a stock gun, your MAXIMUM recommended battery is an 8.4v 1700mAh Ni-MH sub-C pack. You are now well exceeding that limit.

[Hedonism Bot]

I use semi-auto about 80% of the time and as I said the gun won't be totally stock for long.

Just out of curiosity why would a higher capacity battery lead to damaged internals? I can understand the problems with using a higher voltage battery but was under the impression that using a battery with a higher Milla-amperage would do nothing but allow the battery to run longer and at higher loads before draining.

I'm going by the metaphor often used when explaining batteries, if a battery is a bucket of water, the voltage is the size of the hole in the bottom (through which the water/electricity escapes) the Milla-amperage is the total size of the bucket (determines how long it can run before emptying) I guess if you have a super huge bucket the water/electricity would escape at a higher pressure but it's still limited by the size of the hole (voltage).

Maybe i need to go back to battery university.

[Jimski]

higher capacity gives higher discharge rate, more initial torque at the motor and longer boost.you can crank heavier springs.
higher voltage usually means higher motor speed.

I use a 10.8 v 4200 mAh with a sp120 spring and helical torque up.
I never had any problem at all.

this 10.8 battery partially discharged can still crank a M150 several times, a Nicad 1700 mAh 9.6 freshly charged dies/jams quickly with the same effort.

[ILLusion]

Originally Posted by Hedonism Bot

I use semi-auto about 80% of the time and as I said the gun won't be totally stock for long.

Just out of curiosity why would a higher capacity battery lead to damaged internals? I can understand the problems with using a higher voltage battery but was under the impression that using a battery with a higher Milla-amperage would do nothing but allow the battery to run longer and at higher loads before draining.

I'm going by the metaphor often used when explaining batteries, if a battery is a bucket of water, the voltage is the size of the hole in the bottom (through which the water/electricity escapes) the Milla-amperage is the total size of the bucket (determines how long it can run before emptying) I guess if you have a super huge bucket the water/electricity would escape at a higher pressure but it's still limited by the size of the hole (voltage).

Maybe i need to go back to battery university.

This topic of discussion has been repeated many many times... but using your analogy as a reference, with a bigger bucket of water, all the extra water on top will definitely add more weight on the hole, and thus, although in one given instance of time, the volume of water coming out of the hole is the same, over time, the volume is actually greater due to a higher hydraulic pressure against the hole.

That analogy is incorrect though, as it assumes that the larger volume bucket (current) pushes more water out.
The truth is, larger capacity cells have lower internal resistances, and as a result, allow the load to PULL more current as required. Smaller capacity cells have greater internal resistances (this lost energy efficiency comes out in the form of heat), and as a result, exhibit lower rates of fire.

As you've noticed, your trigger response time time has improved - this is a function of the reduced internal resistances of the cells... this translates in to a higher start up time and higher rate of fire.

So how does this affect your internals?

With the increased rate of fire, in a full auto firing situation using stock or low powered springs, your gears are spinning much faster than what is recommended. Because the spring isn't of sufficient strength, the piston is not able to return to battery before the sector gear comes swinging around to start the firing cycle over. The piston toothrack ends up raking across the sector gear's teeth, and as a result, the first several teeth of the piston tooth rack ends up getting ground down over time.

[Hedonism Bot]

Thanks for taking the time Illusion. I see re-enforced internals in my future.