Small caliber spud gun/ Nerf gun

[Stormling]

I'll actually use it but I sorta need the trigger not inline with the tank so I can mount it, thats why I was going with the modified valve.

A diagram of your intended configuration would help us help you

So I'm correct in thinking that if I get a blowgun with a good flow, i pump up the tank stick in the dart and pull the trigger I can fire.

Pretty much.

I think a blowgun triggered QEV would be a good choice

Most people don't realise that with a decent barrel blowguns used directly make pretty good valves. I did this with this:



Add a properly set detent and it has the potential to be more powerful than any piston valve.

I have definitely found the type of valve I need thanks or the help.

[Stormling]

I'll see if a can post up some diagrams of my original design as well.

[Stormling]

Btw if you could give me some info about the valve in that pic that would be great.

[jackssmirkingrevenge]

Btw if you could give me some info about the valve in that pic that would be great.

It's just a common blowgun valve, you can get a similar one for peanuts off eBay.

[Stormling]

Thanks for the help.
Do a need a barrel that big though.

[Labtecpower]

Thanks for the help.
Do a need a barrel that big though.

depends on when you're satisfied. more barrel = more power (to a certain degree)

[Stormling]

Thanks for the help.
Do a need a barrel that big though.

depends on when you're satisfied. more barrel = more power (to a certain degree)

So I can just keep cutting of bits till Ii'm at a happy medium with length and power?

[Labtecpower]

yes. but you lose power with every bit you cut off.

have a play with this if you want to see figures.

[Crna Legija]

yea but then if you lop off to much you need to buy a new one. you should use GGDT read the instruction on the sit on how to use it and if your using vista run as admin or it wont work.

set the valve to generic, seat dia about 0.5 cm, opening time 15ms and dwell about the same(guessing but should be around that), then play with pressure and barrel length

edit ahh to slow

[Stormling]

yea but then if you lop off to much you need to buy a new one. you should use GGDT read the instruction on the sit on how to use it and if your using vista run as admin or it wont work.

set the valve to generic, seat dia about 0.5 cm, opening time 15ms and dwell about the same(guessing but should be around that), then play with pressure and barrel length

edit ahh to slow

10 ms then

[Crna Legija]

yea but then if you lop off to much you need to buy a new one. you should use GGDT read the instruction on the sit on how to use it and if your using vista run as admin or it wont work.

set the valve to generic, seat dia about 0.5 cm, opening time 15ms and dwell about the same(guessing but should be around that), then play with pressure and barrel length

edit ahh to slow

10 ms then

no i was to slow to get u the info not teh valve

[Stormling]

No not really you gave me an excellent springboard.

[Labtecpower]

you was too slow to give the GGDT info, but I didn't give valve info. I recommend a seat dia of about 0,2 cm. There are a lot of twists, turns & holes in the blowgun guts.

[Stormling]

So i'm still gonna need some designs/help with a tank.
I'm now going for a 75-100 psi tank on recommendations from Jackssmirkingrevenge. I'm only getting messages saying that the projectile has not left the muzzle so i'm hoping with more experimentation with the program I can get success.

[Crna Legija]

get a screen shot of ggdt for us to see.