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AAAA Batt specs help... Not AAA

Post about things you have launched or thought about launching. Also post about various materials used for building cannons. No posts about explosive projectiles!
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AAAA Batt specs help... Not AAA

Unread postAuthor: Lftndbt » Fri Nov 23, 2007 8:21 pm

Sorry if this has been done till dead...

Does any one use AAAA batteries in their air cannon?
I have a full metal/alloy, modified piston rifle, run's 150PS.... Blah, blah, blah...
Anyway's it's good.. I'll post later.. Modding now..

I'm in Aus and am interested, if anyone had run spec's on AAAA batteries?
No not AAA, AAAA...
Not really cost effective to buy... but has anyone else figured out where to find them? Just wondering... :)


Just in case you forgot... (sorry about the metric, well not really, i've taken the time to learn Imperial so...) Bare in mind these spec's will vary slightly between brand's and type of batt... Lith-ion, Ni-Cad,NiMH..

AA- Width:14mm (depending on plastic shroud thickness)
Length:50mm (Including terminal ends)
Weight:24.7g

AAA- Width:10mm (depending on plastic shroud thickness)
Length:44mm (Including terminal ends)
Weight:12.1g

AAAA- Width:8mm (No plastic shroud on{I got them out of another battery})
Length:40mm (Including terminal ends)
Weight:6.4g

Any help would be tops!
Here's a few pics... sorry cruddy phone cam...
Will post some damage pics when I can...
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Attachments
with tip.JPG
Tip in place
with tip.JPG (8.8 KiB) Viewed 908 times
m1.JPG
Length
m1.JPG (6.8 KiB) Viewed 908 times
m4.JPG
Length with tip
m4.JPG (5.81 KiB) Viewed 908 times
m3.JPG
m3.JPG (7.56 KiB) Viewed 908 times
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Unread postAuthor: Novacastrian » Fri Nov 23, 2007 8:38 pm

Assuming that round is solid it will tumble in flight. You either need to.

1. make the front heavier then the tail
2. drill out the base (same as 1.)
3. add some kind of tail brake (streamer etc)
Are you aware of how they hit the target when you tested them?
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Unread postAuthor: boilingleadbath » Fri Nov 23, 2007 8:52 pm

Oh, my local hardware store carries them... and I don't mean in 9 volts.
Otherwise? Haven't seen em anywhere.
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Unread postAuthor: Lftndbt » Fri Nov 23, 2007 9:02 pm

Well so far, they have shot very similar to shooting AAA or AA..
They seem to stay, dead straight for atleast 12m. With the tip's on I seem to easily, get grouping's of 5 shot's in a 150mm target from 30m..

1. Front is heavier than the back.. Due to the stainless steel tip... Tip weights- 4g...
2. I don't think I can "drill" out the base... it's a sealed Alkaline battery like a AAA...
It might get a bit messy...
3. I have many different types of darts for hunting, practice... Some with "streamer's", but most with as you have stated, cone or projectile with hole drilled in the back to aid the shot..

For this one however, I was hoping to go for something with a 'lil more knock down force, as well penetration.. But on a low cal projectile.
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Unread postAuthor: Hotwired » Sat Nov 24, 2007 6:33 am

Have you... put soldering iron tips on those?
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Unread postAuthor: Lftndbt » Sat Nov 24, 2007 9:01 am

No I haven't, put soldering iron tips on them.. ;)
They have Stainless tips that a friend and myself machined..
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Unread postAuthor: Lftndbt » Sat Nov 24, 2007 9:13 am

Ok...
Got my new pump... :D
Did some shot's at 160-170PSI..
AAAA's stay straight for atleast 20m without tip's.. No fluctuations in flight either... And are always hitting on the end fired first... no spinning..
The extra 20 PSI seems to have done the trick..
Go straight through 1/4 ply, up to 10m. :)

Tip's get permentantly fixed to batt's tomorrow...
Will try to get some shot's up...


The point of these are to take out big motha rats...
At this rate I don't think, there is going to be much rat left when I hit one.. :twisted:

Hopefully the tip will allow the projectile to go straight through.. So I don't have to cut the bugga open to get my round back... :P
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Unread postAuthor: Lftndbt » Sat Nov 24, 2007 9:42 am

This is with your basic nail for small cal hunting...
And my 320mm for skewering the bigger rodents... They tend to run away with smaller darts in them... Not with these babies... :twisted:

This is what I have been using... Has been effective...


Both these shots were from from 15m... Into 1/4 in Pine ply... slightly weathered as you can see... Only bought it a week ago though so it's not old.
Fairly good penetration..
At 110PSI (Was getting a bit late... Will try 160 tomorrow)
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Attachments
Batt front.JPG
AAAA with moulded 50mm nail.
Batt front.JPG (8.33 KiB) Viewed 832 times
Batt front (2).JPG
AAAA with moulded 50mm nail.
Batt front (2).JPG (9.87 KiB) Viewed 832 times
dart side.JPG
hunting dart
dart side.JPG (7.66 KiB) Viewed 832 times
dart side (1).JPG
hunting dart
dart side (1).JPG (8.74 KiB) Viewed 832 times
both.JPG
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Unread postAuthor: POLAND_SPUD » Sat Nov 24, 2007 10:02 am

if you can machine (have access to machines etc.) why do you want to use batteries....? use steel rods and machine them
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Unread postAuthor: Lftndbt » Sat Nov 24, 2007 10:34 am

I don't have access to a machine laith any more... :(

And in Aus it's not so cool, having projectile's that look very similar to rifle rounds lying around...

These are also easy to make up when I need them.. :)
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