Great- thanks for the ideas and links. I like the flying debris as the landers
lift off.
Garolite seems similar to PCB material- interesting idea.
Now I just need to decide how to hold the rocket vertically. Obviously I need
a frame of some sort so I may go with Unistrut again.
-Bob
On Sep 12, 2016, at 11:35, Ben Brockert <wikkit@xxxxxxxxx> wrote:
Maybe a minute or two to burn through a paver? 10 seconds would be
easy, and you get a nice bit of art afterward.
Here's what the setup looked like: https://www.youtube.com/watch?v=4LrcEd-JhMI
The frame for the pavers is just angle steel. Once the pavers fail
they'd get messed up and I'd weld them back together. They're just
friction fit, but you could make a 'curved' deflector with two or
three of them and hold them in place with construction adhesive.
https://www.youtube.com/watch?v=Rn6xIfY_3zM destroys two pavers in
short order; directing straight down into them is apparently harder on
them. It's also twice as much thrust as the other video. You can see
the steel frame that held the pavers glowing red. The second video in
that compilation is the result of my thought "Hey, let's just cover
the pad with pavers to protect the concrete." Didn't work at all, but
made for a funny video. They hover sideways surprisingly well.
Steel plate will work for a little while. Needs to be thick. I think
Armadillo took off from steel plates during X Prize Cup days, and that
was with an engine just a few inches from the ground.
A garolite sheet would also probably work for a little while, and
throw less molten rock. $15-$30 for a square foot on McMaster.
On Mon, Sep 12, 2016 at 12:03 PM, Robert Watzlavick
<rocket@xxxxxxxxxxxxxx> wrote:
Ben,
How long did the pavers last? I only have a 10 second burn planned. I'm
sure it varies with distance, thrust, angle, etc. What about a 1/4 or 3/8
steel curved plate? I wonder how long that would survive. Or maybe an
aluminum one with tubing welded on the back with water running through it.
-Bob
On Sep 12, 2016, at 09:51, Ben Brockert <wikkit@xxxxxxxxx> wrote:
I'm glad to hear the test went off fairly well.
