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CD-R Spindle Mine

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#26 SHADOW HUNTER ALPHA

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Posted 24 February 2007 - 11:24 AM

I have literally spent an hour trying to get these working last night after I posted and don't see how this thing can propell darts 25'+....

You have to figure out exactly how to get the most out of the force the frisbee has when it unfolds.

I also do not think that these mines, although effective in design, are feasible for anyone to mass-produce. The CDs and springs would add costs that would skyrocket prices for consumers, plus it wouldn't be pleasant for the person shelling out the money to buy the supplies in the first place.
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#27 CaptainSlug

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Posted 24 February 2007 - 02:49 PM

It took a bit of research but I'm slowly finding sources for JUST the packaging (100 disc cakeboxes) and the average price for them is $1.10 each.

So
+ 100ct cakebox = $1.10
+ 25 #8-32 threaded rods = $6.64 - 95475A338
+ 100 #8 nylon spacers = $7.37 - 94639A401
+ 100 #8-32 hex nuts = $2.30 - 90760A009
+ AR-15 Carbine spring = $3 (not sure what length I need to cut it to just yet)
+ 490 rubber bands = $5.49 - 12205T55
+ PETG tube = $1.50 for 6 feet - 9245K15
+ 2 Junk CDs = free

Total = $30

Number of mines made with supplies = atleast 4
Cost per mine = $7-$9

Edited by CaptainSlug, 24 February 2007 - 02:50 PM.

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#28 Grenado

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Posted 24 February 2007 - 03:57 PM

Is it worth 8 bucks for one of these?
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#29 CaptainSlug

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Posted 24 February 2007 - 04:46 PM

Is it worth 8 bucks for one of these?

We'll find out later when I have a complete prototype.
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#30 Grenado

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Posted 24 February 2007 - 05:34 PM

Woah. You've got 666 posts there CS. How long do you think it will take to make one of these?
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#31 CaptainSlug

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Posted 24 February 2007 - 05:49 PM

How long do you think it will take to make one of these?

Anywhere from 30 minutes to 2 hours depending on your ability and tools.
You only have to cut some plastic tube to 2-inch lengths and drill a whole bunch of holes in order to get the thing working.

Edited by CaptainSlug, 24 February 2007 - 05:49 PM.

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#32 nerfer34

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Posted 24 February 2007 - 07:56 PM

Is it worth 8 bucks for one of these?



Anything that CS makes is worth $8. Come on, its a mine! A nerf mine!
I'd be down with buying this for $10.
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#33 CaptainSlug

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Posted 24 February 2007 - 11:32 PM

Well the prototype is made. Mixed results after a few hours of testing.
Posted Image
Shown here loaded with 32 darts. 24 darts ended up working better.
Posted Image
Posted Image
Posted Image
Not sure if I'm happy with it. It's amusing, but the spread is only 6 feet. Granted, that's the spread if it's sitting on the ground. It improves a good deal when it's at chest level. In a few days I might try making a pole base to see if a tiki-torch version will give a decent blast radius. If not then I'll have to start over from scratch.

The video will be up in a little while.
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#34 Grenado

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Posted 24 February 2007 - 11:49 PM

CS, you've done it again! That looks awesome, but won't a tiki version kinda, you know, be a little obvious?
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#35 CaptainSlug

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Posted 25 February 2007 - 01:06 AM

Here's the video.


CS, you've done it again! That looks awesome, but won't a tiki version kinda, you know, be a little obvious?

Well I guess you could set it on a ledge instead. I'm not really happy with it's performance at the moment. The rubber bands simply can't throw the darts very far.

Edited by CaptainSlug, 25 February 2007 - 01:27 AM.

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#36 nerfer34

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Posted 25 February 2007 - 11:13 AM

I had a good idea for camoflague.

Make the mine on a pole like a tiki and then make it look like a lamp. That would be stealthy if you were nerfing and you told your friend to turn on the light and he gets shelled with stefans!
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#37 SPU-Nerf

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Posted 25 February 2007 - 12:03 PM

How about making it sticky on the base and sticking in on the ceiling so then the darts rain down?

Edited by SPU-Nerf, 25 February 2007 - 12:09 PM.

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#38 Prometheus

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Posted 25 February 2007 - 12:04 PM

Yes, I wouldn't be suspicious at all of a lamp post. out in the middle of somewhere where there shouldn't be a lamp post. However, CS's idea of on a ledge is good, as it is way better concealed.
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#39 SHADOW HUNTER ALPHA

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Posted 25 February 2007 - 02:09 PM

How about making it sticky on the base and sticking in on the ceiling so then the darts rain down?

One problem. How do you get it down? With an adhesive that is weak enough to take down, the inertia of the top of the mine flying downwards will bring the entire mine towards the floor and could hit someone in the head. It would have been a good idea, though.
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#40 CaptainSlug

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Posted 25 February 2007 - 04:03 PM

I'm not happy with this thing. I have a completely different design in mind now, but i think I'll spend more of my time in the next few months working on CSHG.
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The little critters of nature, they don't know that they're ugly. That's very funny, a fly marrying a bumble bee. I told you I'd shoot, but you didn't believe me. Why didn't you believe me?

#41 z80

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Posted 25 February 2007 - 05:35 PM

How about making it sticky on the base and sticking in on the ceiling so then the darts rain down?

One problem. How do you get it down? With an adhesive that is weak enough to take down, the inertia of the top of the mine flying downwards will bring the entire mine towards the floor and could hit someone in the head. It would have been a good idea, though.

But the inertia would be moving in the opposite direction. The spring will be pushing the base towards the ceiling.
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#42 Commonly Hunted

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Posted 25 February 2007 - 05:46 PM

Not the lid. When CS makes it so that the base and lid don't come apart when it explodes, he could do that but the sticky stuff might not work on most ceilings (popcorn).
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#43 SHADOW HUNTER ALPHA

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Posted 25 February 2007 - 09:26 PM

But the inertia would be moving in the opposite direction. The spring will be pushing the base towards the ceiling.

Not the lid. When CS makes it so that the base and lid don't come apart when it explodes, he could do that but the sticky stuff might not work on most ceilings (popcorn).

The fact that the lid and base won't go flying apart is why the mine would come down. Even though the lid will be stopped, the energy that the spring gave it while pushing down will continue to carry the entire module down, and most likely rip apart the adhesive's bond, peeling the paint from the ceiling and leaving residue behind, not to mention posing a threat to anyone directly below the mine.
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The only commonly shared fate among us all is death. I turn to the shadows so that I may not be unfamiliar with hell's corridors when I arrive. - SHADOW HUNTER ALPHA

Founder of the Shadow Militia.
Founder of Nightshade Laboratories and The Nightshade Armament Corporation.

#44 murakumo32

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Posted 26 February 2007 - 12:33 AM

That video was could be nominated for an Oscar (or whatever).

Anyways, the idea seems good, but the design just isn't practical. If it worked (in place of a better word) better, it would seem worth pursuing, but a lot of your other projects look infinitely more promising.

That's just my opinion though, so I now possess flaming immunity.
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#45 CaptainSlug

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Posted 26 February 2007 - 01:06 AM

I agree. This is a half failure. It worked, but not well enough to merit further development.
I have a pneumatic land mine idea that I will work on at a later date.
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The little critters of nature, they don't know that they're ugly. That's very funny, a fly marrying a bumble bee. I told you I'd shoot, but you didn't believe me. Why didn't you believe me?

#46 pat 1st Lt

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Posted 26 February 2007 - 04:20 PM

The concept is solid. Its the rubber bands that are lacking in the acceleration of the darts.

If you could get a circular case that was larger in diameter it might work better. A larger case would mean more room for the rubber bands to stretch, meaner better acceleration and range.

I'd also look into stronger rubber bands.

If I were you I wouldn't give up yet.


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