Editing Da Vinci Project (section)

==Hardware==

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The rocket and support equipment was mostly COTS components with a hybrid propulsion system using [[nitrous oxide]] and a spin cast paraffin fuel engine in a re-loadable and expendable cardboard cartridge. The most notable development problem was finding a practical low cost solution to the thermal contraction of the liquid paraffin fuel when it cooled and solidified inside the cartridge inner casing.
The capsule used two automotive racing seats and aviation BRS parachute systems and was designed and modeled with finite element software. The nozzle was carbon fiber exterior with a tough, thermally insulating inner coating. The combustion chamber was metallic, although a wound carbon fiber exterior was planned but never completed. The planned tracking system used a four car team with networked laptop computers using a hybrid cellular and shortwave radio with the capability of automatically predicting the landing spot so a support team could converge on the landing spot hand prior to landing. The highest forces were predicted to be at re-entry, peaking at approximately at up to 6G. Development, construction and testing continued in earnest until the second flight of the X Prize on October 4, 2004.