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My first homemade
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Argoms
Junior Member


Joined: 26 Aug 2012
Posts: 76



Post My first homemade  Reply with quote
After learning about the theory of pretty much freaking everything to do with springs for a few months, I finally started to make something.

Here's a very early version of my homemade Nerf gun. Current specifications:
Plunger tube: 6" draw, 1.25" diameter, polycarbonate
Spring: Full length K26
Seal: 2x O-rings, needs improvement
Barrel: 12.7mm butyrate (perfect fit on stock darts). Single-fire, no hoppers etc. yet
Ranges: Untested.
Catch mechanism: Clothespin

One interesting thing about it is that it has no plunger rod (or string) at all. This saves a lot of space, and allows me to squeeze more power out of the same spring load by reducing the plunger mass. Unfortunately, I don't have any spacers, so the metal nuts I use to space out the catch might reduce the benefits of this reduced mass.



For more information, see my currently quite boring blog: http://argoms.blogspot.co.uk/2012...ade-well-it-shoots-and-thats.html
Wed Nov 21, 2012 9:39 pm View user's profile Send private message
Argoms
Junior Member


Joined: 26 Aug 2012
Posts: 76



Post Reply with quote
FubarRifle (my name for it) officially lives up to its name.

The plunger head is exceptionally well made, and the design works in theory, but I made so many errors in machining everything but the plunger head that I'd be better of starting again from scratch.

Also beginning to consider nesting butyrate and brass, updates on the effectiveness of that will come some time.
Sat Dec 01, 2012 10:26 pm View user's profile Send private message
ThatBritishGuy
Veteran Member


Joined: 06 Apr 2012
Posts: 342
Location: Amersham, Bucks



Post Reply with quote
Do you use the same epoxy putty ramp and plungerhead style of a SNAPbow (with o-rings obviously) for the catch with a clothespin trigger? If so how has it held up over time without any form of plunger rod? You may find that it is harder to get full compression of the spring over time as it may buckle outwards. Is the dart then front loaded into the barrel and the barrel pushed back to catch the plunger head? Nice design anyway - innovation is always cool, and its a break from the usual sort of designs, keep up the good work!
Mon Dec 03, 2012 8:02 pm View user's profile Send private message Send e-mail
=Waffle=
New Member


Joined: 23 Aug 2012
Posts: 9



Post Reply with quote
Did you base this homemade on a direct plunger system blaster? I could see this homemade as a replacement of the plunger system of the longshot. [/list]
Mon Dec 03, 2012 10:49 pm View user's profile Send private message
Argoms
Junior Member


Joined: 26 Aug 2012
Posts: 76



Post Reply with quote
This system was created to be part of a scaled up longshot, so I used the same priming mechanism.

It'd be easier to make something from scratch than to make a new longshot system because of shell limitations. Which is what I was doing (and will again, but more effectively).


Tue Dec 04, 2012 3:31 pm View user's profile Send private message
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