66 replies to this topic

[Dayko]

What if my Lowes doesn't have the SCH80 then what should I use? Just regular CPVC?
Sorry is these questions are annoying.

Edited by Dayko, 10 June 2007 - 01:07 AM.

[SHADOW HUNTER ALPHA]

Dayko, on Jun 10 2007, 02:06 AM, said:

What if my Lowes doesn't have the SCH80 then what should I use? Just regular CPVC?
Sorry is these questions are annoying.

Yes. This worked very well for me, since converted stock darts (and I assume Angel's red FBR) fit snugly, which is the sign of a good barrel material for spring and powerful air guns. It is also cheap and widely available, although you will also need a 1/2" CPVC coupler that fits over the pipe, and that is to be glued into the hex bushing.

[Dayko]

So I still need the PVC 1-1/4" to 1/2" socket weld reducing hex bushing and a CPVC coupler?

[SHADOW HUNTER ALPHA]

Dayko, on Jun 10 2007, 02:21 AM, said:

So I still need the PVC 1-1/4" to 1/2" socket weld reducing hex bushing and a CPVC coupler?

Yes. Follow the same setup, and then glue/cement the coupler into the bushing after step 12

Edited by SHADOW HUNTER ALPHA, 10 June 2007 - 01:41 AM.

[frost vectron]

If you're using the tan CPVC stuff, you might need a shorter barrel depending on how tight it is on your darts.

[General Cole]

Your lowes should have SCH80. If not see if you can find a pipe distribution company. They will have it.

[Dayko]

There is a plumbing supplies store up the road from me, would they have this stuff?

[LastManAlive]

PointBlank, on May 22 2007, 05:45 PM, said:

Thats flippen sweet. Actual ranges would be nice two.

Better spelling would be nice also.

This gun IS flippin' sweet. Bought one last night and just finished slapping a CPVC coupler on it. I got BAD ranges and stinky fishtailing. Ran inside, grabbed 8 inches of brass, added e-tape so it would fit in the coupler, and got dart losing ranges.

I got at least 80 feet accurately and the rockets get about 60 feet with a small, yet normal incline for rockets. Very happy.

[Dayko]

With CS mod here will it still be able too fire the large missiles that come with it?

[CaptainSlug]

Dayko, on Jun 10 2007, 12:29 PM, said:

There is a plumbing supplies store up the road from me, would they have this stuff?

Yes

Dayko, on Jun 10 2007, 02:34 PM, said:

With CS mod here will it still be able too fire the large missiles that come with it?

Not unless you use a barrel material that has the same outer diameter as the stock barrel. The only material I know of is this aluminum barrel I've been experimenting with that has a 5/8" OD.

[Dayko]

Where would I find this aluminum barrel?

[CaptainSlug]

Mcmaster part# 1658T49 - Alloy 6063 Aluminum Round Tube .625" OD, .527" ID, 8' Length = $7.54 for 8 feet

Edited by CaptainSlug, 10 June 2007 - 03:39 PM.

[Dayko]

Can it only be bought form there? You can't find it at Lowes?

[General Cole]

Lowes has jack nothing comparatively(sp). McMaster has most od anything that you could ever need for piping.

[CaptainSlug]

Dayko, on Jun 10 2007, 03:47 PM, said:

Can it only be bought form there?

They are the only source for that particular barrel material. I generally prefer to order tubing/pipe from them because I always know exactly what I'm getting down to the thousandths of an inch.

[General Cole]

Other than making it yourself, that is the way to get most barrells(sp).

[wintermute]

I haven't heard of many people using it, but 1/2 inch copper makes an EXCELLENT barrel for my 1/2 inch stefans. It is also fairly cheap, easy to work with, and readily available from Home Depot or Lowes. Also, as I said in another thread, I did the CS mod, and found out that the 1/2 inch copper will fit tightly into a 1/2 in CPVC coupler, which will then fit tightly into the 1/2 inch PVC coupler used in the CS writeup.

I used a 12" barrel, and the ranges were quite satisfying.

[Dayko]

Ohh yeah this was another question I had: What size barrel should I use? I will be using it for both stefans and stock darts. Also General Cole what is the SP in your post?
Another thing when asking at Lowes for the SCH80 should I say SCH80 or is there another way too say it? In case they don't know what that is.

Edited by Dayko, 10 June 2007 - 10:18 PM.

[CaptainSlug]

SCH80 = Schedule 80
(sp) = too lazy to check the correct spelling
Barrel size = Something between .51" to .535" in ID

[Dayko]

I should have been more specific in my last post. How long should the barrel be? Length wise.

[monkey with a nf]

To find the ideal barrel length for anything, use the following formula:

Air volume(plunger tube volume, or in this case, pump volume times number of pumps) * constant/(radius of barrel^2) , where the constant is a number between 3-4, depending on how tight your barrel is.

EDIT: Clarification

Edited by monkey_with_a_nf, 11 June 2007 - 06:44 AM.

[CaptainSlug]

For the big blast a barrel length somewhere between 10 and 14 inches works best. I tend to avoid bothering with barrels longer than 14 inches because they become awkward.

Edited by CaptainSlug, 11 June 2007 - 09:36 AM.

[LastManAlive]

Dayko, on Jun 10 2007, 11:34 AM, said:

With CS mod here will it still be able too fire the large missiles that come with it?

As I said, I put a CPVC coulper on mine and my barrel is 17/32s brass. I acheived ranges of at least 100 feet with the brass. I put the 6 inch CPVC barrel in the coupler with the rocket over it and it was about a 15 foot increase from stock.

[CaptainSlug]

If you plug the pump of your Big Blast and that results in your trigger breaking it's not really that difficult to make a new one. I made this one in in 30 minutes using 1/16" ABS plastic sheet with a layer of 1/8" acrylic on either side to add the slides and trigger pin hook.

[Dayko]

What doe's plugging the pump do? Nice trigger CS.