Note: Picture not necessarily drawn to scale
Note: I put this in the homemade section because about half of it is homemade. On the other hand, the other half is a Nerf gun made by Hasbro. So, I guess I’ll leave it up to the moderators to decide where they want it.
Now, I’ll give a little explanation of how this thing works, coinciding with the labels on the picture (“A” through “J”)
The Air System
A. The pressurized air storage tank. It will be made of 2” PVC and should be pressurized to about 80 or 90 PSI
B. The first solenoid valve. When opened, it allows the air from the pressurized air storage tank into the pressure chamber.
C. The pressure chamber. It will be about the same size as an AT2k pressure chamber or larger, thus (hopefully) giving similar ranges.
D. The second solenoid valve. When opened, it allows the air in the pressure chamber to move forward in the barrel. Note that the first solenoid valve will have to be closed in order to prevent the whole storage tank from being released as well.
E. The Mav turret will have had CapainSlug’s “end-clip” mod done to it, along with extended CPVC (or possibly 9/16” brass) barrels added to it.
F. A bike pump, which could be used to fill the pressure chamber for single shots.
The Electrical System
G. Three 9 volt batteries, wired in series, to power the solenoids
H. On/Off switch turns off the whole system.
I. Contacts. These will work similarly to the NF’s light, but if you noticed there are a total of three contacts here. The center contact is attached to the trigger. When not being pulled, the completed circuit opens the rear solenoid (B.) to fill the pressure chamber. As the trigger is pulled, the first circuit breaks and the rear solenoid valve closes. Continuing the trigger pull, the barrel lines up with the air output point (like a regular Mav) and the second circuit is completed. This opens the second solenoid (D), firing the Viper.
J. Another On/Off switch. It will break the circuit for the rear solenoid (B.) even when the trigger is forward, thus allowing the use of the bike pump to fill the pressure chamber and not the storage chamber.
While I'm posting, I hope that someone could answer a quick question: is my method of filling the pressure chamber for single shots going to work? All it is is a piece of tubing (vinyl, I think, is the one to use) that will be on a fitting that will be epoxied into the pressure chamber. Do I need some sort of valve for this to work, or will just running it into the chamber work? Also, do you suggest some sort of cutoff valve for when I’m not using the pump?
Also, any other suggestions for improvement of the design would be much appreciated.
PS: I know that some persons don't like people who just post ideas. I'm sorry, but I just wanted to see if I was doing anything wrong in the design before wasting money. I promise that it will be built eventually, in some form, unless I completely messed up and this won't work at all.
Edited by jwasko, 30 April 2007 - 08:46 PM.