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| saladtossser |
 Posted: 07/15/2006 14:06 PM Post subject: centrifugal vortex bbmg |
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SpudZilla
Joined: 26 Mar 2005
Posts: 1237
98.19 Spud Bux
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you get the idea, this will use air and/or an electric motor to spin, a motor alone is too slow, compressed air is blasted into the center of the spinning thing and as it forces out in every direction, it will propel the spinning thing, also a projectile inside the barrel |
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| Velocity |
| Posted: 07/15/2006 14:08 PM Post subject: |
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Brigadier General
Joined: 07 Feb 2006
Posts: 949
25.42 Spud Bux
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| i think a dremel spinning at 30,000 RPM would be fast enough |
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| huse_spud |
| Posted: 07/15/2006 14:18 PM Post subject: |
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1st Lieutenant
Joined: 15 Apr 2006
Posts: 269
28.86 Spud Bux
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how would it be reloaded? (and yes i know its just a concept but.. you know)
would the motor have to stop or could this be made into a semi auto tyoe? |
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| saladtossser |
| Posted: 07/15/2006 14:59 PM Post subject: |
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SpudZilla
Joined: 26 Mar 2005
Posts: 1237
98.19 Spud Bux
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bbs would come in from a hole at the bottom, like a original vortex gun
30000 rpm would give 130 fps, without any air and not counting any resistance of any kind. |
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| pimpmann22 |
| Posted: 07/15/2006 15:11 PM Post subject: |
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Donating Moderator
Joined: 18 Feb 2005
Posts: 1608
4971.51 Spud Bux
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| How did you formulate such a number? The velocity would depend on the diamter of the wheel. |
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| saladtossser |
| Posted: 07/15/2006 20:30 PM Post subject: |
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SpudZilla
Joined: 26 Mar 2005
Posts: 1237
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| exactly... i bet any average joe who went to grade 7 math can figure this out |
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| pimpmann22 |
| Posted: 07/15/2006 23:20 PM Post subject: |
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Donating Moderator
Joined: 18 Feb 2005
Posts: 1608
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| No crap! You never gave a diameter on the wheel. You were only discussing it in theory. Just cause you got everything worked out in your mind doesnt mean I can read it and have access to it. |
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| benstern |
| Posted: 07/15/2006 23:54 PM Post subject: |
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Donating Member
Joined: 21 Sep 2005
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126.17 Spud Bux
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30,000 RPM that would translate to around 200-300 rounds being ejected per second. (considering that not every blade would catch a bb each time)
Also, if the bb input was pressurized with around 100 psi but the wheel was powered by dremlal would the velocity of the bbs be much higher?
It would also be more efficient if the bbs enter through the center then let gravity and centrifigal forces do the rest.
If the bbs entered the bottom a blade might be in its way, thus reducing the number of rounds per second. |
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| SpudStuff |
| Posted: 07/16/2006 1:04 AM Post subject: |
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Major General
Joined: 10 Dec 2005
Posts: 1379
128.17 Spud Bux
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| ohh a simple design made complicated with no benifit |
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| benstern |
| Posted: 07/16/2006 19:36 PM Post subject: |
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Donating Member
Joined: 21 Sep 2005
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| huse_spud |
| Posted: 07/16/2006 22:03 PM Post subject: |
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1st Lieutenant
Joined: 15 Apr 2006
Posts: 269
28.86 Spud Bux
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| SpudStuff wrote: | | ohh a simple design made complicated with no benifit |
i think the benifit would be a more continuous and more predictable stream of bb's.
i've never made a bbmg myself but ive seen video. |
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| chosen_way |
| Posted: 07/17/2006 2:39 AM Post subject: |
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Staff Sergeant
Joined: 02 Jul 2006
Posts: 106
71.82 Spud Bux
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im probably wrong but anyway, wouldnt the blades spinning creat enough air so that would eleminate the air compressor all together? and also instead of everyone arguing over the design why doesnt one of use try it, i no i would if i had the money right now. most of the simplest ideas work the best  |
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| carlbelcher |
| Posted: 07/17/2006 2:59 AM Post subject: |
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Donating Member
Joined: 12 Jun 2006
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| Quote: | | most of the simplest ideas work the best |
This far from the simplest BBMG design. The simplest BBMG is a cloud type BBMG that can be made with as little as 3-5 non-moving pieces.
| Quote: | | wouldnt the blades spinning creat enough air so that would eleminate the air compressor all together? |
No, I think you might be missing the point. The idea of using an air flow is to feed bbs to the spinning wheel and also to perhaps speed up the wheel. The air flow created by the wheel would have a somewhat opposite effect, it would push the bbs away. |
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| benstern |
| Posted: 07/17/2006 13:49 PM Post subject: |
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| The Haymaker |
| Posted: 07/17/2006 19:48 PM Post subject: |
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Corporal
Joined: 22 Sep 2005
Posts: 74
222.67 Spud Bux
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I very much doubt that the airflow created by the spinning wheel would be greater than the incoming air supply. If that was the case, I think that air compressors would be much cheaper. 
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