raptorz

The guns design has been modified to accept 4x 14500 lithium-ion batteries, instead of the discontinued ones that I originally used.
The range of the gun level, has been tuned to get a range of about 90feet (89, 92, 94, 88)at the cost of increased noise.

If anybody wants the electronics to be pre-made, I am willing to make them up and post them to you. So all you have to do is glue the switches in place.

The Basic circuit (no voltage monitor) will cost around 26USD
The Advanced circuit (voltage monitor) will cost around 40USD
And the batteries and charger will cost around 20USD

The build instructions for this gun have been uploaded to instructables
For the full guide look, Here

This is the coolest homemade I have seen in a long time. Well done dude.

I assume you could alter the rate of fire by fiddling with the gear of the advancing arm?

Thanks
Yes, the gearing can be changed to increase rate of fire, but on my attempts it reduced the range as I think the ROF was too high and the flywheels lost momentum, however using a voltage/speed regulator, and low ratio gear would allow you to tune the ROF perfectly.
I have the gearing of 3:1 to allow for the most basic circuit I can make do the job, however more efficient systems could be made using Semiconductors.

This is seriously cool. As a Technic manipulator of Lego myself, I may have to give this a shot. Congrats on the awesome build.

Have you integrated any other stabilization tricks besides the crosspiece bars? Not being glued, I just winced at the thought of taking a spill while wielding this. T'would not be a pretty sight.

Thank you
The crosspieces are the only real structural support needed, the gun is pretty sturdy with all of the bricks overlapping and have never had any problems with bits dropping off the body or handles, the only real problem I have had was the flywheel structure coming lose, when stuck with enough force. The problem was reduced with the Pistons at the front (I am still looking into a more sturdy & simple solution) I dropped the gun once in battle, and only took about 20 -30 seconds to fix (pre piston fix)
If you are absolutely paranoid about it falling apart you could use glue, but IMHO it defeats the structural challenge of Lego.

I am thinking of making an abusive use video to show the sturdiness of the gun, sometime soon.

Oh, just to spit a idea out in the open, this gun makes a really good turret gun.

Full build instructions have been uploaded to instructables.com if anyone is interested click here

I am currently obtaining the required electrical parts, to make a detailed instructions on wiring the internal electronics.

A closer look at the internal mechanics of the gun can be seen here.
http://www.youtube.com/watch?v=MtFO2syIfps

- does anyone think the voltage indicator should be made default or optional? (cost is aprox $6)


I was just contemplating making it run on 14500 Li-Po (AA) cells. (as I can't source my Li-Po packs anymore)
It would mean I would have to extend the gun backwards by about 2cm /3 studs.... anyone interested in me doing this?




@gehaga thank you for making your first post here
there is a partial safety feature, the guard around the front, true its more to protect the Flywheels from damage than your fingers....
however you can poke it when its running at full speed, and it just makes me jump a bit
this it the guard.

and the gun without it

(I made a full cover once, but if it jams (it never does) you couldn't get at the dart, and it also makes it look fugly)