Thanks Ben,
As intriguing as CNC, 3d Printed, Ultrasonic, high tech stuff sounds,
I'll bet that forging is a better process once you build the tool.
Assuming the milling was done to clean up the halves ?
-Gar.
:)
From: Ben Brockert <wikkit@xxxxxxxxx>
Date: Fri, 22 Dec 2017 18:43:41 -0800
Subject: [AR] Re: SDR Antennas.
On Fri, Dec 22, 2017 at 5:57 PM, <snyder@xxxxxxxxxx> wrote:
Anybody blow anything up lately ? :)
(The only full test is to destruction)
Today we burst tested a tank. Spherical aluminum, but made very fancy
(forged and machined) rather than my usual approach of just spinning.
The welder sharpied a Death Star design all over it, and another guy
took the inspiration and 3d printed out some tie fighters and X-wings
which we stuck to the tank. The burst was very satisfying, they all
went flying when the hemisphere jumped. Hopefully I'll be able to
share video next year. For the sake of absurdity I made the argument
that blu-tacking plastic parts on the outside of a metal tank
technically makes it a COPV, if you have a very forgiving definition
of "overwrap".
Someone has probably thought of putting an ultrasonic wall thickness
measurement tool into the tool holder of a CNC lathe or mill. The
biggest challenge of the fabrication was getting consistent inner to
outer cut, since with basically no force the hemisphere can move by
more than its thickness.
Earlier this week I dumped 600 gallons of LN2 on the ground, but it
didn't destroy anything so I don't know if it counts as interesting.
Ben
