Monthly Archives: August 2013



My dad was throwing out this quartz radiant shop heater!  I hooked it up to see if I could thermoform the acrylic overhead window.


It had to be installed far enough away that the heat would evenly affect the width of the acrylic.  I also had a weak spot and changed the design of the cut (luckily I had two of these in stock).


Unfortunately, at that distance too much of the heat was attenuated.  It took about an hour to get a slight permanent bend in the window.  I went on to purchase a second unit on eBay which will sit beside this one for a second round of testing.

Pressure Regulator Installed

Had some good weather this weekend so I was able to get the Numatics E22 hooked up to the big Numatics air spring. I thought we had a problem the first time I started it up:

Turns out it needs a command signal (verifying with Numatics) anytime the unit is on (probably will make that computer-controlled with a SSR).

Once I applied the command signal it was very responsive with no weight. Didn’t get a chance to load it up yet though.

One other item that I contacted Numatics about was this 1/8″ (?) FNPT port on the back of the unit (side opposite of the readout panel). It leaks air proportionate to the pressure setting. I think it might be for an analog gauge but I wanted to make sure before I plug it.

Second Flight

Altitude vs. Time Plot

Altitude vs. Time Plot

Ground: 904′ MSL
Apogee: 954′ AGL
Samples: 1147
Flight time: 54 s

New 2.4 GHz color camera and microphone payload with 9 V alkaline battery. Couldn’t get the ground components running so we have no live video feed but we have video from the platform and hand-held video. Class G with standard main deployment on delay from the engine. Estimated to go to 1000′ AGL – we hit 954′ AGL.