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New idea for fin-stabilazed ammo?

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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New idea for fin-stabilazed ammo?

Unread postAuthor: Alex345 » Sat Aug 11, 2018 6:08 pm

I have just ordered a piece of aluminum profile tubing that has a shape for which i've been looking for a while:
Xporfile.1.jpg
Xporfile.1.jpg (18.7 KiB) Viewed 124 times


I was thinking of cutting like 2cm long pieces of this piece and attach those to a piece of wire rod to serve as 8 mini fins. Wonder if this would be accurate? If the projectiles can be easily made consistently.

round.2.png
round.2.png (25.21 KiB) Viewed 124 times
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Alex345
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Re: New idea for fin-stabilazed ammo?

Unread postAuthor: jackssmirkingrevenge » Sun Aug 12, 2018 6:12 am

Very interesting find!

With regards to your projectile design, I'm not sure it would work as-is, you probably need the tail portion to be longer - basically the sharp angle at the rear of the front mass will probably not allow enough air to flow over the fins for them to be effective.

Have a look at the M830 120mm tank round for example:

Image

That taper on the end is going to smooth the airflow and enable the fins to stabilize the projectile.

Russian 125mm shells with a similar blunt profile also feature spring-out fins that extend past the caliber diameter to be effective:

Image
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hectmarr wrote:You have to make many weapons, because this field is long and short life
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jackssmirkingrevenge
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Re: New idea for fin-stabilazed ammo?

Unread postAuthor: Alex345 » Sun Aug 12, 2018 5:29 pm

Thanks for the input! I'll keep a design in mind with a longer tail section and where the body of the round tapers down to the piece if wire rod that holds the fins in place :)

These also look good for making some folding fins too!
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Re: New idea for fin-stabilazed ammo?

Unread postAuthor: jackssmirkingrevenge » Sun Aug 12, 2018 6:44 pm

Can you link to where you found it?

I think something like this would also work very well:

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hectmarr wrote:You have to make many weapons, because this field is long and short life
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