biged
Master sergeant 
Posts: 468
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Post by biged on Jun 20, 2008 5:55:25 GMT -5
4.2 Inch Chemical Mortar   Caliber: 4.2” (107mm) Barrel Length: 48 inches (barrel is rifled) Weight: 333 pounds, complete Maximum elevation: 1065 mils Minimum elevation: 800 mils Maximum traverse: 350 mils right or left of center Maximum Range with high explosive projectile and point detonating fuse: 4,400 yards Minimum Range: 565 yards Types of Ammunition used during WWII in the ETO: High Explosive; White Phosphorus; Smoke; Illumination Rate of Fire: First two minutes: 40 rounds First 20 minutes: 100 rounds Sustained Fire: 80 rounds per hour - Intel Courtesy of www.100thww2.org The ball cap was not easy to design.  The internals are a 3 inch piston piloted by 1/2 QEV and triggered by a blowgun. I have pressure tested this setup to 400 psi. Shot it as high as 260 psi. But for safety purposes I keep it under 150 psi.  I sourced a 4" conduit sleeve.      Trying like hell to keep it clean looking.  ///ed/// |
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Sgt_Tom
Technical Sgt.
Combat!
Posts: 3,580
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Post by Sgt_Tom on Jun 20, 2008 8:18:54 GMT -5
Awesome job as usual. I don't see how you make such complex good looking stuff. Can't wait to see the finished project.
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mccallion
Private 1st Class
Official Road Sign Reader (retired)
Posts: 770
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Post by mccallion on Jun 20, 2008 9:22:10 GMT -5
wow i cant wait to see that at the gap in july once again ed you have amazed me
mccallion
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2nd Bat
Master sergeant
Posts: 11,813
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Post by 2nd Bat on Jun 20, 2008 11:00:58 GMT -5
Wow. That has to be a monster. With that sort of design and build quality and range. The concept of legitimate indirect fire. remotely directed and aiming stakes and what not really become quite viable.
Great job. You are ahead of your time but definitely pulling the hobby in the right direction. I am impressed. Very cool indeed.
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biged
Master sergeant
Posts: 468
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Post by biged on Jun 20, 2008 17:36:57 GMT -5
Thanks guys. I will try and have it complete for the gap in Amsterdam.
The benefit of a large of a large piston and a small chamber is less gas. My 81mm will suck a 20lbs tank dry in 200 shots.
This design will get over 600 shots from a 20lbs tank.
I did finish a plywood 4.2 baseplate in about 1.5 hours. Sourcing info and clear detailed pictures of the 107mm is difficult.
///ed///
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Medic
Sergeant
I'm 12 not 25!
Posts: 1,539
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Post by Medic on Jun 20, 2008 17:47:03 GMT -5
You're bringing it to Mignano? SWEET!
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biged
Master sergeant
Posts: 468
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Post by biged on Jul 7, 2008 17:46:54 GMT -5
About 90% completed. * Need to cleanup some knots plywood base. * Finish the mock tube recoil track. * Paint it.     The "Standard" or elevator is always a pain-in-the-ass to make. Definitely not a portable weapon. I should repro the m1a1 mortar cart. handcartz.com/1/M1A1-Chem-cart-P-1.phpBut my gut is telling me to mount it to a piece of plywood with small 6" disconnect wheels and handles, to "wheel barrel" it around. That base could then be camouflaged with sandbags. Which are piled up all over it just like all of the original photographs. Making clear pictures of actual baseplate a headache to scale. ///ed/// |
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TommyGunner
Staff Sgt.
Hackjob Mauro
1st Marine Division, 1942
Posts: 2,265
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Post by TommyGunner on Jul 7, 2008 18:06:06 GMT -5
Wow you are amazing, this thing rocks!
TommyGunner
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mccallion
Private 1st Class
Official Road Sign Reader (retired)
Posts: 770
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Post by mccallion on Jul 7, 2008 18:07:03 GMT -5
it looks awsome ed keep up the good work
mccallion
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YankeeDiv26
Staff Sgt.
Frustrated Mac Owner
BDM<33
Posts: 2,462
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Post by YankeeDiv26 on Jul 7, 2008 18:09:48 GMT -5
Goddamn, that thing is slick! I think the wheel idea would work out great for it.
Amazing work yet again.
<YD>
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2nd Bat
Master sergeant
Posts: 11,813
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Post by 2nd Bat on Jul 7, 2008 18:47:05 GMT -5
I suspect that while heavy, it's not nearly as heavy as a real one which was a monster. Like a real one you will need a crew for this guy. I can't wait to see it all painted.
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Post by Warlord on Jul 7, 2008 19:53:10 GMT -5
I'm a bit more fearful than I previously was.
That is one hell of a nice piece there Ed.
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biged
Master sergeant
Posts: 468
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Post by biged on Jul 8, 2008 4:45:17 GMT -5
Weighs around 80 lbs (35 kilos). The tube is 40 lbs, base is 8 lbs, and the standard is 30 lbs.
///ed///
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Post by Obergefreiter Raimund on Jul 8, 2008 8:30:14 GMT -5
WOW, NICE JOB!!!
I hope you realize that, just bringing that to the game will make you a target for just about everything we Germans have... especially sniper fire from Josh.
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biged
Master sergeant
Posts: 468
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Post by biged on Jul 10, 2008 16:41:58 GMT -5
Finished. Add 4 lbs for the mock recoil track. A coat of khaki primer/sanding sealer, then 3 coats of Krylon OD. I blued some of the bolts because paint and threaded bolts do not mix.      The above photo is actually shows the back of the mortar traverse. I like to have the handle of the right side of the motor, not the left. I pictured it with it on the left side to be more historically accurate.  ///ed/// |
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mccallion
Private 1st Class
Official Road Sign Reader (retired)
Posts: 770
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Post by mccallion on Jul 10, 2008 16:52:55 GMT -5
looks awsome edd  i cant wait to see it at the game mccallion |
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2nd Bat
Master sergeant
Posts: 11,813
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Post by 2nd Bat on Jul 10, 2008 18:22:08 GMT -5
Wow! Very very cool and appropriate for many periods and conflicts. It works both visually and functionally. I am more than impressed.
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Ersatzjack
Corporal
"That silly Franz... he thinks we are winning."
Posts: 1,093
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Post by Ersatzjack on Jul 10, 2008 20:14:08 GMT -5
Boy that does look nice. Great work as always.
Have you ever tried a water balloon round? That would solve a lot of guesswork on whether you are a casuality or not. If you get wet then you've been hit with shrapnel. Balloons and not tennis balls against personnel would be better if it could be done.
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i cant wait to see it at the game
