Show Off Your Armory/Loadout (image heavy)

[Pointman9]

Taking fugly to a whole new level, I present the Barripede.  Or maybe Stampicade.  One of the two?  It's essentially a Stampede receiver attached to Barricade flywheels.  The Stampede bolt is broken so it was replaced with a rod that pushes the darts into the flies.



The Stampede gearbox is currently running on 18 volts.  (You can also see the 'Cades flywheel power source in the bottom left corner.)



The Barricade flies run off of another 9 volts.

[d4rk354b3r]

Yeah I've thought about something like this before. I think it's pretty interesting to see this with a stampede receiver though.

The Stampede gearbox probably puts out more torque than you need it to; you can get a higher firing rate if you change the gearing ratio.
Though it's always nontrivial to change the gear ratio of a gearbox.

[jburn23]

Did you build really that in the store? Mad props.

As for silicone rubber, I don't know. It might be too grippy.

Thanks. Yea it took a little while though. The guy working in the plumbing section was a plumber, so that helped.

Last night I finished the modular trigger/catch T-joint that SGnerf designed. It appears that it will work properly.

Edit:Silicone foam rubber?

I googled, and apparently such a material does exist. However, I would think it would be WAY too grabby on absolutely every material known to man to make a dart. I don't think you could shoot a foam rubber dart out of anything, even a barrel made of solid PTFE.

Don't worry about the low density FBR. Short darts are not very sensitive to exact foam aerodynamics and typical NIC guns and barrels are not as a combination sensitive to barrel fit like stock/HVZ typical barrels are. There are very few mag feed applications to worry over; hoppers don't care about foam rigidity or tackiness. If you can make it fit a barrel, make it straight and round, and mount a tip on-axis and square, you will get usable stefans out of it.

The drawback of cheap foam is that it often has a lower melting point and may raise problems if you are like most and use hot glue in making darts.

Okay, I see. The general consensus seems to be that foam rubber probably wouldn't work very well. I will try making some slugs from the FBR available. Thanks for the advice.

Where'd you get all those Magstrike clips?
I always thought the Magstrike would be great, except for the lack of quick reloads.

Ebay. It is the most convenient place to find them besides Craigslist, which I don't use anymore.

[Masturcief42]

Swarmpede wip.

Still waiting for batteries and springs so I worked on this while I waited.
Now has a nice cut-down upside-down swarmfire stock. I'm also making a vfg for the swarmfire trigger.

[Pointman9]

A much more aesthetically pleasing blaster, my new Sceptor.
The barrel is completely wrong, it needs some SCH 80.  The huuuuge tank is going to be stored in a backpack while playing.



Closeup of tank


Just the blaster by itself.  I really like the positioning/angle of using wyes for the pump handle, but didn't want to waste a wye on something silly like a handle.

[Gumbysmash]

When I saw the Derp a Saurus, I threw up in my mouth a little... but REALLY nice use of kit bashing skills!

[Pointman9]

When I saw the Derp a Saurus, I threw up in my mouth a little... but REALLY nice use of kit bashing skills!

Yeah it is really fugly.  But it works, which is the important thing

[d4rk354b3r]

I finally finished my stampede! Just in time for tomorrow's game at SFSU
Sorry for the poor quality of pictures

I call it "The Eviscerator"



The Ammo Counter shows current ammo count as well as the set magazine capacity.
Magazine capacity is adjusted via potentiometer, located at the bottom of the pistol grip (hard to see in these pictures)
Current magazine capacities supported: Any number from 12 to 35



You might have noticed this large black knob on the side of the blaster and what it might be for.
It is a firing mode selector; the blaster can currently fire in Semi-Automatic, 3 rounds burst, and Full Automatic firing modes.
The ammo counter sometimes bumps and counts an extra dart, but I have only noticed this in dryfire tests with 3 round burst and Full Auto, but have not witnessed this when the blaster is loaded or in semi-automatic firing mode.

When the firing mode is changed, an abbreviation for the firing mode (like "SA" for semiauto) shows up on the display for a short period.

Many thanks to SpookyLucaz for helping with some of the body work.

[torukmakto4]

How did you implement selective fire? Are you driving the motor with a MOSFET?

[d4rk354b3r]

How did you implement selective fire? Are you driving the motor with a MOSFET?

I'm driving the motor with a 5 volt spdt relay.
I count every plunger cycle as a fired round and just turn off the relay when the ammo counter counts however many rounds.

[EDIT]: The thought of using a MOSFET to control the firing rate intrigues me.
I know I can use the ammo counter to measure the firing rate fairly accurately.
If I wanted say, 400 rounds per minute, could I use a PID Controller with a MOSFET to precisely tune the firing rate?

[SpookyLucaZ]

Can't wait to see that thing pummel zombies today! I have to say that burst fire is amazing...

[torukmakto4]

I'm driving the motor with a 5 volt spdt relay.
I count every plunger cycle as a fired round and just turn off the relay when the ammo counter counts however many rounds.

[EDIT]: The thought of using a MOSFET to control the firing rate intrigues me.
I know I can use the ammo counter to measure the firing rate fairly accurately.
If I wanted say, 400 rounds per minute, could I use a PID Controller with a MOSFET to precisely tune the firing rate?

Oh, a relay. Well, you could easily substitute a MOSFET for the relay and have no potential problems with contact/mechanical failure or latency, and probably lower resistance, and reduced size, not that I think the relay would ever cause any problems. You would need a typical airsoft-type braking FET pack to do that with a pede, something like IRLB3034 and IRF4905 plus some TVSes and resistors. (My vulcan switch fet is just a 3034 and doesn't have braking because that is not necessary on a vulcan action.)

As to variable cyclic rate, you could do that by using PWM and a solid-state driver of some sort but that will require a much more sophisticated motor driver than a common gate 3034/4905 pair, possibly something like the "smart" airsoft fet packs that are in fact somewhat like your electronic selective fire and my FADCS idea. I do know some of those are dual N-channel fets, one for power switching and one for braking.

(I hope you weren't thinking of driving the motor linearly with a mosfet...)

If you want to go variable cyclic, you could just have selectable values for a fixed PWM "throttle" setting chosen so as to get the rates of fire you want. That would be roughly equivalent to swapping in different voltages of power setups. I wouldn't bother with the PID control (or any feedback control) in the current setup. If you want to do that, you need a tach signal, either from an encoder/sensor or from a brushless motor's supporting electronics (thinking way into the future there...). In short, using the ammo counter as the speed input would make the feedback unacceptably sluggish because you only get one value for cyclic rate per cycle, and only starting 3 cycles after pulling the trigger (the first shot is always under average because the rotating masses are still accelerating).

[KatanasPWN]

I finally finished my stampede! Just in time for tomorrow's game at SFSU

Damn dude, that thing kicked ass today!

[Darthrambo]

I threw some powerstrike 48 motors and tommy 20 wheels in a barricade.  Put a recon clip and some trustfires. 

More pics and a vid over here http://nerfmodsandnews.blogspot.com/2012/09/barricon.html

[SpookyLucaZ]

Dammit! You beat me to it!
I'm working on the exact same shell work using the recon magwell and 9V instead. Its looking real pretty though! Well done.

EDIT:Topics merged.