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Lbb Problem

Fishtailing and bad range

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#1 monkey with a nf

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Posted 31 December 2006 - 03:23 PM

I recently modded my LBB with 12" of 1/2" ID PETG and a pressure valve plug. The tank will pump fine, but when I fire it with even 12 pumps, my darts fishtail and go shorter than they do with 8 pumps. The barrel seal also seems fine. I think the fishtailing is caused by too much power, but I don't get the poor ranges. Help?
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QUOTE(Pineapple @ Sep 12 2007, 03:13 PM) View Post

For maximum efficiency?


1. Pump up. Count how many pumps.

2. Keep going until you hear a loud "bang".

3. Subtract one pump from the total. Rebuild your air bladder.


There you go.

#2 nerfer34

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Posted 31 December 2006 - 04:26 PM

You have to put the dart all the way in back of the barrel. Are you using stock darts or stefans?

Yo[b]u barrel may be too tight and too long.
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#3 Carbon

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Posted 31 December 2006 - 05:20 PM

It's a fair bet that 12" is too short, especially since you're fishtailing with more pumps....try a longer barrel and see what it does.

Edited by Carbon, 31 December 2006 - 05:22 PM.

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#4 Flaming Hilt

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Posted 01 January 2007 - 03:03 AM

I always thought the first place we went with fishtailing darts was the dart, not the gun...

I don't know if power changes the required length or weight of a dart, but just for hits and giggles: how long are your darts and how much weight do you use (I assume they work in your other guns)?
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#5 monkey with a nf

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Posted 01 January 2007 - 01:16 PM

When I did this, I was using my lighter CDT stefans (.17 cal BB's) and just placing them in the barrel. With heavier CDT stefans (3/0 fishing weights) and a ramrod, it works fine.

On a related note, I'd perfer to use a coupler rather than a ramrod for this. However, i don't exactly get how to do so- is there some step beyond just gluing the coupler to the barrel and and putting your barrels in the right size PVC?
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QUOTE(Pineapple @ Sep 12 2007, 03:13 PM) View Post

For maximum efficiency?


1. Pump up. Count how many pumps.

2. Keep going until you hear a loud "bang".

3. Subtract one pump from the total. Rebuild your air bladder.


There you go.

#6 ompa

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Posted 02 January 2007 - 03:37 PM

Well, I'd just glue the coupler directly to the tank, instead of the pvc barrel. But you basically have the right idea. It's nothing more than a coupler glued either to the tank or the barrel (with a stub of pvc glued to the tank if you choose the coupler on the barrel route), and just attaching and detaching the barrel whenever you need to load. Seeing as you're shooting micros, you could either go for 1/2" cpvc and not worry about fitting your barrel into pvc (assuming you darts fit into cpvc, it's really tight), 1/2" SCH80 pvc (the store around me carries sch80 pvc that fits my micros; they might not fit yours), or you can go with 1/2" SCH80 pvc with brass nested inside. If you can't find SCH80 pvc, you can always go with 1/2" SCH40 pvc and wrap the brass in some tape before shoving it into the pvc.

~ompa
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#7 monkey with a nf

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Posted 02 January 2007 - 05:20 PM

Thanks for the help. As soon as I get my brass from McMaster, I'll be doing this.
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QUOTE(Pineapple @ Sep 12 2007, 03:13 PM) View Post

For maximum efficiency?


1. Pump up. Count how many pumps.

2. Keep going until you hear a loud "bang".

3. Subtract one pump from the total. Rebuild your air bladder.


There you go.


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