Swarmpede wiring question
Posted 12 July 2012 - 09:36 PM
Now, I have no intention or need to fire both guns at the same time. The swarmy will basically be a super fast firing cover gun while I reload the stampede. The problem with my design is that it still ALLOWS the two to be fired at the same time if my finger were to slip while firing either one. Would both guns firing at the same time put too much load on the 4 trustfire 3.7 volt batteries to cause an issue? Or would it just cause both guns to fire at a lower rate? I'm not quite sure about the electrical aspect of these batteries, but know that they are a bit more finicky and risky than your basic protected batteries. I'd rather not add a second battery pack to the gun to put each one on a separate circuit, but if there is a safety issue I can probably find somewhere to stick them. I usually don't mind just trying stuff and seeing if it works, but when it comes to electricity I'd rather be on the safe side and ask someone with more experience.
Any advice is welcome, as well as more ideas for my "frankengun". So far the stampede has volt, spring (6kg), AR removal, the back half cut down like SGnerf's SMG mod with a longstrike stock attached to it, and a 2.5' blowgun lashed on to the top rail. Still debating cutting down the front of the stampede as I heard it may decrease accuracy for the sake of range, and I have the blowgun for range. The swarmfire is still on the way.
Posted 12 July 2012 - 10:29 PM
Yes, you will most likely experience problems when firing both blasters through a single 4 Trustfire battery pack. Your replacement spring in the Stampede (it's from OMW, correct?) will require your motor to use up most of the current in order to compress the spring and cycle the action. I have tested a Stampede with an OMW spring replacement + ACE #115 + stock spring with 5 Trustfires before without a problem (cycling that is; the spring rest shattered from the force after ~150 darts). But 4 Trustfires between two blasters is iffy, even when accounting for the small amount of energy required to cycle the Swarmfire.
I would recommend having a battery pack for each blaster on independent circuits to keep it simple. Trustfires have a high enough mAh to run for quite some time in a Stampede alone but when run through both blasters (with different motors and spring constants) it may deplete their charge at an unexpected rate. For the purposes of use in your blaster combo it might not matter though. I have run 4 TF packs through many different spring combos but never through two blasters at once.
Some additional info to help in your modding:
-Trustires hate the cold. If it's 45 degrees or below out, expect your Pede to not cycle properly. Especially with a spring replacement, as this requires even more work to be put on your batteries.
-Watch out for breakage on the spring rest of the Stampede's plunger tube. I usually reinforce this piece with epoxy putty whenever I do spring replacements.
I hope I could help! Here's the Stampede I mentioned earlier(shameless additional picture):
it cant be as bad as reloading an ak-47 on the run
Posted 14 July 2012 - 01:43 AM
What part exactly is the plunger tube spring rest? The little round part on the back that screws on to the bigger tube?
Doubt I'll have much of a temperature issue, as I'm playing in Texas! But I'll keep it in mind if something goes really wrong with the weather.
Posted 14 July 2012 - 10:47 AM
Edited by Aeromech, 14 July 2012 - 01:05 PM.
This is so ghetto but so awesome.
Posted 14 July 2012 - 01:49 PM
If you are worried about draining your battery I recomend picking up some 18650 size ultrafires. They are basically just AA ultrafires but bigger with the same voltage but longer life. They are actually cheaper than AAs and you can buy trays for them of ebay for cheap.
Because of the make up of these batteries they weigh almost the same as AAs too.
If you do cut off the front, where would you put the swarmfire?
Posted 14 July 2012 - 07:22 PM
(I don't know how much you know about electronics, if you decide to go with this method, you will need a switch with three prongs on the back, not just two)
(send me some pictures when you're done, this sounds awesome!)
Posted 14 July 2012 - 11:55 PM
Though if there is anyone out there who knows more about the electronics aspect I would love to hear from you. If there is no safety risk of occasionally firing both at once I'll just stick with the second thumb trigger. Not really overly concerned about a little extra discharge rate, as I can charge it between HvZ missions. If I go through enough darts to discharge the batteries I still have a backup set, and if I go through them the zombies have earned their kill. Dead batteries = OK, exploding batteries = not OK! I've done wiring and stuff before, but am not sure what exactly an "unprotected" battery means and what is no longer being protected.
And I'll be sure to post pics and maybe a writeup when I'm done.
Edited by ChIck3n, 14 July 2012 - 11:57 PM.
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