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Author Topic: NEW PROJECTILE FOR MY 5" MORTAR  (Read 877 times)

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Offline quackgr

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NEW PROJECTILE FOR MY 5" MORTAR
« on: December 11, 2008, 02:20:12 PM »



 here are some pic of my newest projectile for my Cohorn mortar. It  was a blast to figure out the right timing, the fuse was to long, the fuse blew out, the ----- came out to soon, the strap broke had to make whole new cannister.


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  best view of my wife???  ( she is lighting the fuse ). 


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Gerald C


 


 


 





  Gerald C
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Offline KABAR2

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Re: NEW PROJECTILE FOR MY 5" MORTAR
« Reply #1 on: December 12, 2008, 06:58:20 AM »
I see you are starting your own space program.........
due to bore size I guess your first astronaught will be
a hamster................

I like it in a way but mortar shells making a soft landing......

I don't know there's not satisfying TUMP of them landing........
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Mr president I do not cling to either my gun or my Bible.... my gun is holstered on my side so I may carry my Bible and quote from it!

Sed tamen sal petrae LURO VOPO CAN UTRIET sulphuris; et sic facies tonituum et coruscationem si scias artficium

Offline GGaskill

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Re: NEW PROJECTILE FOR MY 5" MORTAR
« Reply #2 on: December 12, 2008, 09:08:15 AM »
The only problem with that kind of slow descent is that any wind will carry the re-entry vehicle farther away.
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“If you're not a liberal at 20, you have no heart; if you're not a conservative at 40, you have no brain.”--Winston Churchill

Offline quackgr

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Re: NEW PROJECTILE FOR MY 5" MORTAR
« Reply #3 on: December 12, 2008, 02:51:22 PM »
   

  It' realy my secret p dog wepon, it comes down on top of them  and traping them with the chute. It holds them so I cane get closer to them then bang!

 Gerald C
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Offline Tropico

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Re: NEW PROJECTILE FOR MY 5" MORTAR
« Reply #4 on: December 13, 2008, 09:06:29 AM »
Nicely done ., more details please .,it does look like fun !
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Offline quackgr

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Re: NEW PROJECTILE FOR MY 5" MORTAR
« Reply #5 on: December 13, 2008, 12:25:29 PM »
  what you see is a 6ft drouge chute, I got it off e-bay. I made the bail from 3/16 steel rod, use some surplus ss clevis, the main cord is 1in. nylon flat cord, the base of the shell is 3/4 in plate I mach. a step on it to hold the tube. the tube is from a hog roller that they use in farrowing pens, they are getting hard to find, because they rust away real fast. a 1/2 bolt is drilled to.190" dia. to hold the fuse, the head of the bolt is dished out and filled with lead, this is  used to stake the fuse and to make it tight so no combustion can get by. the inside of the plate has a small combustion chamber, it hold 35 grs. of fff black.. the trick is to get the charge to go off when the shell is just before max height.

 Gerald C
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Offline waynef

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Re: NEW PROJECTILE FOR MY 5" MORTAR
« Reply #6 on: December 16, 2008, 03:42:23 PM »
Neat Idea Gerald,

The model rocket guys us a small altimeter device that will set a charge off at apogee to blow out a chute or the altimeter can deploy a streamer at apogee and a chute out at a lower altitude at say 300' (adjustable). The G forces from the mortar launch is much less then some of the rockets I've seen.

Nice photo's,

Wayne
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