The links below are known to be dead. They did contain some great and useful information. Fortunately, they can still be accessed in a web archive. The text will be present, but the graphic images may be lost.

To use the WayBack Machine, you may need to cut and past the URL into the web site http://www.archive.org. If you find any other dead links, don't give up. Try using the Wayback Machine! Please be patient, as the Wayback Machine can be slow...

http://fdd.gsfc.nasa.gov/gmod/papdeut/abstr.html Attitude and Trajectory Estimation Using Earth Magnetic Field Data. A NASA paper describing the technique, limitations, and promise of this technique.

http://www.primenet.com/~tmorgan/rockets/opus35/ 35mm rocket camera conversion article.

http://www.primenet.com/~tmorgan/rockets/opus35/ Build a camera payload

http://ourworld.compuserve.com/homepages/viralex Schematic for a accelerometer.

http://www.albireo.org/rockets.html Interesting information on using the Taniwha flight computer in your hpr rocket.

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I just wanted to drop you a line to say thanks.  The last couple of years I have been away from my son, (I recently retired from the Military).  I wanted to make up for some lost time with him, do something that was both fun and educational.  I found it at ApogeeRockets.com!  I recently purchased your "First Time Flyer" package.  We went throught the videos and read the instructions.  We took off to a nearby field and had 3 successful launches in a row.  I haven't seen that look of amazement and joy on his face in quite sometime.  Thank you again.
-- Darryl M