Hi everyone,
First of all, please apologize some grammatical and other errors, my English is not very good, I am from Czech Republic (small country in middle of Europe). I want show you my second Potato gun, what I made. On this gun I worked almost whole holidays of this summer and I think I succeeded quite 8).
Here are some features:
- weight: 2,3kg
- height: 170cm
- chamber volume: 4l
- barrel diameter: 5cm
- muzzle velocity: about 65m/s
- range: about 200-300m
- electronic trigger
- fan (runs on 18V)
- add laser and collimator (from old toy-gun and its mainly for effect, but functional)
- construction time: about 30hours
- price: about 800czk (its about 45usd)
Posted: Thu Oct 20, 2011 2:29 pm
by Labtecpower
Looks pretty cool
I think it would have been better without the tape
how do you fuel it?
Posted: Thu Oct 20, 2011 2:42 pm
by Harys
Labtecpower wrote:Looks pretty cool
I think it would have been better without the tape
how do you fuel it?
Thx, I had to used the tape on chamber, for covering a wires and other things . And as fuel I use only Propan-Butan spray (for filling of lighter) its powerful and quite cheap, but there is problem with dosage (if its the right word )
Posted: Thu Oct 20, 2011 3:26 pm
by Labtecpower
Hehe I use exactly the same gas
You can meter it using this;
If your chamber is 4 liters you need 132 ml of butane.
Posted: Thu Oct 20, 2011 3:42 pm
by mattyzip77
Thats a pretty cool build. I think you may have used a little too much tape though, lol! I like how you incorporated the pistol onto it. Congrats!
Re: My second Potato Gun
Posted: Thu Oct 20, 2011 6:17 pm
by jackssmirkingrevenge
Harys wrote:Czech Republic (small country in middle of Europe).
It's not only geographically inept Americans on this forum, some of us have heard of your country
Nice work, is this stuff legal where you live?
As Labtec suggested, try syringe metering, check the
Posted: Thu Oct 20, 2011 6:24 pm
by Labtecpower
Further JSR propaganda;
[youtube][/youtube]
Posted: Thu Oct 20, 2011 6:25 pm
by jackssmirkingrevenge
I didn't do it because it's linked to in the wiki entry
Posted: Thu Oct 20, 2011 6:30 pm
by jsefcik
i hope you glued it all!!!
Posted: Thu Oct 20, 2011 6:37 pm
by Labtecpower
I didn't do it because it's linked to in the wiki entry
I spotted it.
Now he only has to do one click
Re: My second Potato Gun
Posted: Fri Oct 21, 2011 2:28 am
by Harys
jackssmirkingrevenge wrote:
Harys wrote:Czech Republic (small country in middle of Europe).
It's not only geographically inept Americans on this forum, some of us have heard of your country
Nice work, is this stuff legal where you live?
As Labtec suggested, try syringe metering, check the
I don't know if it's legal in our country, but I am pretty sure, that if cops see the gun, they will confiscate it
Posted: Fri Oct 21, 2011 2:36 am
by Harys
jsefcik wrote:i hope you glued it all!!!
Not only glued, there is also many screws that connect the pieces, it's very fixed
Posted: Fri Oct 21, 2011 9:38 am
by Gun Freak
The screws only weaken it.
Dunno why people always do that
Posted: Fri Oct 21, 2011 10:44 am
by mattyzip77
Gun Freak wrote:The screws only weaken it.
Dunno why people always do that
I disagree, if you epoxy the screws when you put them in, there is no real loss of power or stability. However, I wouldnt do it on a pneumatic or a hybrid!!!
Posted: Fri Oct 21, 2011 11:26 am
by Gun Freak
Ok it probably won't blow up but what is the use of drilling holes in the chamber and plugging them with screws?
)
