Testing out the miniature Coehorn mortars my friend and I made.


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WarlockFirearms
December 29, 2010, 12:37 AM
Here's some videos from the tests. (http://www.youtube.com/watch?v=ZhjRFoM_DqU&feature=&p=60705A2728AA099C&index=0&playnext=1)

It was a lot of fun. Made the mortar barrels on my lathe from cold-rolled steel. They are .35 caliber and here we are firing them with pyrodex. Had a little trouble working up a blank load with a good report using the pyrodex, but wrapping a little flour in aluminum foil and using it as a projectile seemed to do the trick. These things are a blast and now I want to make something bigger, like maybe a golf ball mortar.

As an aside, does anyone know where to get some real black powder in the Portland, OR area?

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4v50 Gary
December 29, 2010, 01:45 AM
Neat little mortar you made for yourself. I also used aluminum foil for blanks during New Year's.

BHP FAN
December 29, 2010, 06:02 AM
http://hunting-washington.com/smf/index.php?topic=58381.0

Pete D.
December 29, 2010, 08:20 AM
Here are some pics of a Golf Ball mortar that I made on a little four inch lathe. It is from a design by DD over at the GreyBeard forums, called the K.I.S.S. mortar.
http://i492.photobucket.com/albums/rr287/PeteDoyle/KISSmortar2.jpg
These are all the parts - disassembled.
http://i492.photobucket.com/albums/rr287/PeteDoyle/Mortardisassembled.jpg
The shoulder for the breechblock cut into the barrel/
http://i492.photobucket.com/albums/rr287/PeteDoyle/breechblockbarrelshoulder.jpg
The breech block itself - this required the most machining
http://i492.photobucket.com/albums/rr287/PeteDoyle/mortarbreechblock.jpg
The trunnion mounted on the rear of the breechblock/barrel assembly. This pulls the two together and provides and easy disassembly for cleaning.
http://i492.photobucket.com/albums/rr287/PeteDoyle/trunnion.jpg

The bolt shown in the second picture is bored for the fuse and screws through the barrel and into the powder chamber in the breech block.

It is a hoot to shoot.
Pete

Racebannon
December 29, 2010, 10:39 AM
Excellent pics!

WarlockFirearms
December 29, 2010, 04:11 PM
Very nice, Pete.

We machined the barrels from a solid billet of steel (aside from the trunion, which is simply a cross-pin), so it really couldn't get much more simple.

Here are some better pics of my mortar:

http://i.imgur.com/jgq4Fl.jpg

http://i.imgur.com/t7Gcgl.jpg

http://i.imgur.com/Uxc0Zl.jpg

Pete D.
December 29, 2010, 05:00 PM
That is a real mini Coehorn. Very nice pics and a nice job machining.
Pete D.

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