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Supersonic Airsoft BB's

A place to ask general spud cannon related questions.
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Supersonic Airsoft BB's

Unread postAuthor: Dave_424 » Sat May 08, 2010 7:33 am

Well guys, been a while since I posted properly because I have been tuning and making many new parts for my UK Airforce Condor.

Ive added a 24" .25 barrel, made my own Ultra Flow valve, and set up my own regulator system.

This setup will shoot 31 grain H&N barracudas at 950 FPS for over 40 shots.

So I was bored today, and wondered how fast a 6mm 0.2g airsoft BB would go.

It is an extremley loose fit in my barrel, 6mm BB vs 6.35mm bore.

I definatley was getting supersonic cracks so I broke out the chrony.

0.2g airsoft BBs
2000psi fill

1345
1367
1356
1324
1387
1397

and I stopped because my ears were hurting from the sonic boom.

All chrony results were taken 2m from the muzzle to eliminate muzzle blast.

I think that with a true 6mm barrel, I could hit into the 1500 fps

Dave
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Unread postAuthor: Gun Freak » Sat May 08, 2010 10:08 am

Ouch... that's pretty fast for airsoft. You have pics of the setup?
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Unread postAuthor: Dave_424 » Sat May 08, 2010 10:13 am

Yeah, thats over 12 foot pounds (UK legal limit without FAC) but I have an FAC

Image

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Unread postAuthor: Gun Freak » Sat May 08, 2010 10:16 am

Holy mother that's a nice gun.
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Unread postAuthor: Dave_424 » Sat May 08, 2010 10:17 am

Thannks, the only thing standard is the frame and trigger group.

Everything else had been sourced and if I can't find it, I make it

Dave
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Unread postAuthor: Gun Freak » Sat May 08, 2010 10:30 am

Well it looks really nice. Is it single shot? What kind of velocities do you get with pellets or bbs of a better size?
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Unread postAuthor: Dave_424 » Sat May 08, 2010 10:34 am

Yeah it is single shot, I have an Air Arms S410 (The bottom one in the picture) with a 10 shot mag.
Image

I have it tuned for 950 fps (Most accurate speed) with 31 grain H&N barracudas

I can crank the power up to shoot the H&N barracudas to around 1150 fps but they are really inacurate at that speed.

Dave
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Last edited by Dave_424 on Sat May 08, 2010 10:40 am, edited 1 time in total.

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Unread postAuthor: Gun Freak » Sat May 08, 2010 10:36 am

What is your ultra-flow valve?
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Unread postAuthor: Dave_424 » Sat May 08, 2010 10:42 am

Added a pic to the above post.

My valve is a hammer valve that offers MASSIVE flow.

Image

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Nice Airsoft

Unread postAuthor: Technician1002 » Sat May 08, 2010 10:43 am

What pressure are you using for the shot? Very nice build. Do you have plans to post it in the showcase?
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Last edited by Technician1002 on Sat May 08, 2010 10:44 am, edited 1 time in total.
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Unread postAuthor: Dave_424 » Sat May 08, 2010 10:44 am

All shots were all at 2000psi regualted.

However, being a hammer valve, it only uses a small amount of high pressure air.

Dave
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Unread postAuthor: jackssmirkingrevenge » Sun May 09, 2010 2:06 pm

Very nice, you should find a way of trying it out with some true 6mm tubing...
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Unread postAuthor: Dave_424 » Sun May 09, 2010 3:12 pm

Yeah I might, or I will just turn some lightweight delrin pellets. Saves changing out the barrel.

Today I threaded it for a silencer, 1/2" x 20 UNF.

Shooting 31 grain pellets it is near enough silent, with just a high piched woosh of the air. Producing over 60 foot pounds.

Then stick in a airsoft BB and the supersonic crack echoes through the air. My mates wouldnt believe me that the crack didnt mean it was powerful and that the quiet one was WAY more powerful.

I also make a full length shroud to it aswell.

Dave
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Unread postAuthor: Biopyro » Sun May 16, 2010 1:32 pm

Beautiful. I haven't been around for a while and it looks like you've come a long way even when your old stuff was great. Do you have that particular gun on your FAC or is it for something else?
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Unread postAuthor: Dave_424 » Sun May 16, 2010 1:39 pm

It is a Gunpower stealth, evertything has been upgraged except the frame.

New barrel, new hammer, new bottle, new valve, regulator etc.

Now that I have access to machine tools, I can finally make all of the ideas in my head.

Im going to sell the Air Arms S410 after I have it tuned right. Then start on another project of a HPA converted RWS 850 Airmagnum.

Its going to be a poor mans rapid :D

Dave
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