Re: eureka! [TANKS]

[John Bruder <hobbydad-at-adelphia.net>]

Well,

Any paintball range mandates that you shoot your marker under 300 fps.  Generally, 
they want you at 285fps.  Paintball masks are rated to protect you at speeds under 
300fps.  Speeds above 300 can shoot out the lenses with the resulting destruction to 
your eyes.  The balls will break at speeds of 250 fps or less.  I mention 250 fps 
because that is the setting used for night battles.  I bet they will break at medium 
ranges at 200 fps, but only testing will tell.

I had once researched some solenoids that were small, light, and cheaper than the 
KIPs normally used in ships, but they did not have the air flow we required.  I 
don't know if they would have the power needed to fire the balls fast enough to get 
any range.

I will try and find the data.

JB


---- OdysseySlipways-at-aol.com wrote: 

=============
In a message dated 6/21/2006 7:55:10 PM Eastern Daylight Time, 
cjkkclark-at-comcast.net writes:

> I think I finally figured out how to design a multiple "rocket" 
> launching system for a katyusha, nebelwerfer, panzerwerfer, etc.  Chris 
> B.'s homemade canon got my mind working and I'm pretty sure I solved 
> the last part of the puzzle.  Here it is: a CO2 cylinder releases air 
> through a regulator into a large accumulator.  The accumulator is 
> shaped much like a pipe manifold (long chamber with several nozzles 
> opening out of the side).  Attached to the accumulator's nozzles are 
> air hoses that run to the multiple firing tubes (3/4" PVC tubes).  What 
> they actually connect to are solenoid valve/vacuum solenoids (one for 
> each tube).  All of the solenoids are connected to the same circuit 
> that is closed by the "firing" servo.  Until today I could not think of 
> how to fire the tubes, but I through the magical world of the internet 
> I learned all about solenoids, and the problem seems solved!  However, 
> now the trick is to find several (5-10) such solenoids that are not too 
> expensive...any ideas?  I've been doing a lot of online searching, but 
> nothing has jumped out at me yet, so I figured I'd seek some 
> suggestions.
> 
> Also, no one has answered my velocity question yet, so I thought I'd 
> throw it back out...is there a certain fps that is required?  Does 
> someone bring a chronometer, or is it like an honor system thing?
> 
> Finally, as a side note, I was so excited about the solenoid thing that 
> I had to tell someone, so...I told my wife and her response simply was 
> we have a baby before I get to start another project after the 
> 'Picacho'.  So I guess I'll try to motivate my dad or brother to take 
> up this project...
> 
> Chris "do our cats count as kids?" Clark

just saw i never read this yet.........

when i was in the sub committee report, one of the guys there made a launch 
system for the torpedoes in his sub. i'm still trying to remeber it, but i know 
the mechanical part (part of it) was nothing more than a short mounted shaft 
that had lobes mounted to it, and as the servo arm moved, it made the shaft 
turn

the lobes and the shaft where both brass. the lobes where nothing more than 
sliced from a larger, solid brass rod and holes drilled into them in one corner 
area then they where mounted on the shaft. the finished thing looked like a 
car cam shaft (well, that's what it was basicly).

now if i recall, the lobes triggered some sort of valve (not sure how that 
all was now).

i just wish i could remeber more of it, but then that was about 7 or 8 years 
ago when i saw it........... hope the basic idea is of some help.


Chris,
Odyssey Slipways