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Components

A sabot is used to enclose a payload for launch, and - in Raziel - consists of two main sub-assemblies: the foam foamcore sabot shell and the inner metal enclosure.

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The sabot shell, in its complete form, is resembles a cylindrical piece of foam with a centered square cut. For our purposes, the shell is split into two halves, with each rectangular face fitted with Pem-PEM broaching nuts to interface with each face of the enclosure.

The square enclosure fits into the sabot shell to create a housing for the rover, ideally robust enough to withstand a rough landing.

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Upon landing, the sabot is able to automatically deploy its rover. Torsion spring hinges were installed along one edge of the enclosure connecting its two halves, allowing the energy in the springs to be stored while the sabot is in closed configuration. To remain in closed configuration, the sabot assembly was held together by one loop of (dimension) rope, tied around.

Deployment is achieved when a team-built PRC (Pyrotechnic Rope Cutter) installed by onto the loop of rope activates and cuts the rope, releasing the energy in the torsion spring hinges and allowing the sabot halves to separate.

See the sabot assembly in its open configuration below:

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Materials and Preparation

Stiff foam foamcore was used to fabricate the sabot shell in the aim of absorbing lots of impact upon landing.

To be continued....... :o