Author Topic: Rat Gat (Read 61056 times)

Cutter · « **Reply #120 on:** January 19, 2015, 12:42:24 PM »

Bruski,
The .22 is so light it doesn\'t take much to move it.
A little deeper in the chamber , before the recoil occurs makes sense to me.
A new Cam needed.
Thanks again

bruski · « **Reply #121 on:** January 22, 2015, 06:14:12 PM »

No problem!

bruski

Cutter · « **Reply #122 on:** January 24, 2015, 01:00:07 PM »

Fresh off the drawing board.
First I created the cam in a wire frame, from predetermined points.
Next was constructing the surfaces from the wire frame.
Only the cam path surface is used for cutting on the CNC mill.
The diameters and length on the lathe.
This should chamber the round .220 deeper at time of firing/recoil.

Sparky_NY · « **Reply #123 on:** January 25, 2015, 08:06:37 AM »

Ok, I must be a idiot ! LOL All this talk of putting the round deeper into the chamber, and then Cutters cam that puts the round almost a quarter inch deeper at firing, what am I missing? The rounds rim has to be tight to the breech face (barrell face) and the bolt reasonable tight to the round (less headspace). How do you push a round a quarter inch deeper into the chamber??? Tear the rim off? LOL

What the heck am I missing?

George

Cutter · « **Reply #124 on:** January 25, 2015, 11:32:35 AM »

Sorry George, my bad

The problem barrel is at 60Â° from TDC, at the time of recoil the cartridge is only .150 into the chamber.

At recoil the cartridge would sometimes get cocked in the pan, causing the problem.

I changed only the delivery side of the cam.

The path starts at 18Â° , at 60Â° the cam changed by .220 , then back to 150Â°

I need those 3 points to create the spline.

Sparky_NY · « **Reply #125 on:** January 25, 2015, 06:38:55 PM »

Ahhh now I understand ! I was thinking of the barrel that was ready to fire. Couldn\'t figure out why you would try to push a round .220 further into the chamber than its seated position ! LOL

42rocker · « **Reply #126 on:** January 26, 2015, 09:43:22 AM »

Thanks for sharing the timing of the bullet dropping. Interesting diagrams.

Later 42rocker

Cutter · « **Reply #127 on:** January 28, 2015, 04:47:23 PM »

I ran the new front section this mourning.

Showing both front sections

Rear section tomorrow.

Same surface drawing, just flip it 180Â°

Now go cut something

Cutter · « **Reply #128 on:** January 29, 2015, 10:59:40 PM »

Finish cut on rear cam section

Cutter · « **Reply #129 on:** February 06, 2015, 10:28:55 AM »

A little history of this build[attachment=10070:RAT1.zip]

Dave · « **Reply #130 on:** February 06, 2015, 12:59:21 PM »

A little history of this build $\"attachicon.gif\"$ http://www.gatlinggunforum.com/forum/index.php?app=core&module=attach&section=attach&attach_rel_module=post&attach_id=10070\'>RAT1.zip

This is a nice video of the build. Im going to try and upload just the video, un-zipped

42rocker · « **Reply #131 on:** February 06, 2015, 08:12:23 PM »

Cutter

Like the video and the rat gat. Looks super.

Later 42rocker

Cutter · « **Reply #132 on:** February 07, 2015, 10:54:37 AM »

More pictures,

Hinge and ball plunger

Cutter · « **Reply #133 on:** February 11, 2015, 05:35:58 PM »

This ammo works for me. No misfires yet
Buying another 1000 rounds today, getting ready for the next test

42rocker · « **Reply #134 on:** February 11, 2015, 07:10:01 PM »

Cutter -- Good Luck to you. Wait you build so well you don\'t really need that much luck. LOL Enjoy the range time.

Later 42rocker

Cutter · « **Reply #135 on:** February 11, 2015, 07:46:14 PM »

Just letting the guys know about the ammo.

No tweets needed

42rocker · « **Reply #136 on:** February 12, 2015, 12:39:59 AM »

Another place to try. Same ammo I believe.

http://www.centerfiresystems.com/ammunition-22lr.aspx\'>http://www.centerfiresystems.com/ammunition-22lr.aspx

.22 LR Armscor High Velocity HP 36GR 500RD Ammo

Price: $49.99

Also low s&h

Later 42rocker

Cutter · « **Reply #137 on:** February 19, 2015, 11:24:12 AM »

Here\'s the entire assembly, with the modified cam installed.

Every time I make a change other glitches turn up during assembly.

I think ejection might be my biggest glitch now.

You only fail when you quit

Cutter · « **Reply #138 on:** February 19, 2015, 11:25:21 AM »

Also a new the Rotor/Propeller

from 1/4 thk to 5/8

Dave · « **Reply #139 on:** February 19, 2015, 03:31:11 PM »

How was that rotor cut? Looks like a work of art!!!

News:

Author Topic: Rat Gat (Read 61056 times)