CREPinc.com

In browsing around, I found JTrack3D on the NASA, a basic 3D satellite tracker. It works well enough, though it only lets you use predefined vectors. I’ve edited it so that you can use your own. Take a look at JackTrack3D.

Finally got the whole page for the goKart and the logic probe.

To find something to do with my handy-dandy logic probe, I threw together a very simple square-wave oscillator using a 555 timer and some simple components I had lying around. You can only see so many square waves before you get bored, so I decided to see how fast I could make a 555 go. […]

I got the Logic Probe built, and it even looks almost cool… as soon as I get a little time I’ll poke around some chips and see what happens. Until then you can check out the page with a basic description of it.

FINALLY the Low Altitude Temperature Profile page is finished, and includes all the details of the project. The Electric Kart page should be up soon.

Tested the rocket today for the big event tomorrow… let’s just say that thing went downhill after the rocket entered the trees at about 300 MPH. I think I’ll be able to get the kinks worked out for tomorrow…

Let me start by saying that this is easily the largest undertaking I’ve yet done.
I’m working on an experiment to make a mathematical model of the temperature at low altitudes, and how it changes as the sun warms the earth. I’m basing the model around the heat equation.
I plan to launch around 6 rockets, starting […]

Ever since my introduction to computational fluid dynamics last year, I’ve been reading several calc books and tutorials to learn Partial Differential Equations. By no stretch of the imagination am I a master, but last night I finally succeded in solving the Heat Equation.
Not only do I now understand initial and boundary conditions, but I […]

After a few nights of work, I had a hovercraft I was proud of. Beautifully crafted from plywood, a 2×4, and Visqueen, I was certain it would provide hours of hovering enjoyment.
Hah.
My test versions worked perfectly. I figured that the physics would scale up, and all would be great. Turns out, propellers don’t scale up. […]

I recently whipped up some drawings for a easy-to-build two person hovercraft. I’m now in the buildling stage, and it’s nearing completion! I should be able to ferry 350 pounds around, using a 24″ propeller and a tractor starter motor for thrust.

I installed a ball valve to make it easier to spray in the AquaNet. My friend Mike either did a crazy fluid computation in his head or accidentally came up with an amazing method for spraying and loading the potato cannon. With the new method, we hit 386 feet!

The potato launcher video is up! Look under “Projects”.

Today I spent some time fixing and editing several articles that had been haphazardly strewn about for the past few months. Also, I finally got around to writing up a few projects the had not been present. Be sure to check out the new links under “Projects”, as well as some of the old ones […]

I finally broke. I had somewhere near 18 computers, and in general they worked, but since they were old I was always swapping dead disks and power supplies. Plus, managing that many computers when I only have a few hours a day got to taking so much time that I could only manage the cluster, […]

I’ve got the code to a point of semi-completion. I’ll write it up soon, but in the mean time take a look at a (somewhat scary) funny video that came out after a messed-up run: Blowup.wmv