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The initial goals for the payload were simply two pronged: to be able to modularly adapt to payload requirements, and to be thermally insulative. Finding a material that would be insulative and easy to work with was non-trivial; in the end, it was decided to pursue the route of High Density Polyurethane Foam (HDPU). This foam was known to have a thermal conductivity rating just below styrofoam, and was fully machineable to boot.
The initial goals for the payload were simply two pronged: to be able to modularly adapt to payload requirements, and to be thermally insulative. Finding a material that would be insulative and easy to work with was non-trivial; in the end, it was decided to pursue the route of High Density Polyurethane Foam (HDPU). This foam was known to have a thermal conductivity rating just below styrofoam, and was fully machineable to boot.
The principal design featured four main components - a ''chamber'', ''portals'', ''blocks'', and ''retainer plates''. The chamber was the skeleton of the payload, essentially a rectangular box out of HDPU foam panels epoxied together. The most notable aspect was the rounded square holes on each wall of the payload -- these were called ''portals''. A chamber had six portal of a pre-determined shape and size. The modular hot-swap ''blocks'' had the corresponding HDPU rounded-square panel. This HDPU block may or may not have been further machined depending on its purpose -- for example, a block meant to house a GoPro in one wall of the payload would also have a machined GoPro cavity and through-hole for the lens. However, other blocks, like the SSI logo block or note block did not require this kind of HDPU machining. The HDPU block was then epoxied to a wooden outer retention plate (initially bass wood). This outer retention plate had four 1/4" holes. When slotted into the appropriate chamber portal, the block was clamped to the payload using an internal retention plate and nylon bolts. All HDPU was also painted black for heat absorption.
The principal design featured four main components - a ''chamber'', ''portals'', ''blocks'', and ''retainer plates''. The chamber was the skeleton of the payload, essentially a rectangular box out of HDPU foam panels epoxied together. The most notable aspect was the rounded square holes on each wall of the payload -- these were called ''portals''. A chamber had six portal of a pre-determined shape and size. The modular hot-swap ''blocks'' had the corresponding HDPU rounded-square panel. This HDPU block may or may not have been further machined depending on its purpose -- for example, a block meant to house a GoPro in one wall of the payload would also have a machined GoPro cavity and through-hole for the lens. However, other blocks, like the SSI logo block or note block did not require this kind of HDPU machining. The HDPU block was then epoxied to a wooden outer retention plate (initially bass wood). This outer retention plate had four 1/4" holes. When slotted into the appropriate chamber portal, the block was clamped to the payload using an internal retention plate and nylon bolts. All HDPU was also painted black for heat absorption. Further, eyebolts were attached in the four corners of opposite sides to allow fastening to a Tesseract.
A full list of functionalities & features:
A full list of functionalities & features:
=== SPACE Tesseract ===
=== SPACE Tesseract ===
[[File:space_tesseract.jpg | right | thumb | 300 px | <center>SPACE Tesseract & Payload</center>]]
The '''SPACE Tesseract''', colloquially referred to as the ''Rage Cage'', is a light-weight modular exoskeleton developed for protecting the SPACE Payload. In the aftermath of the crash of SPACE Mk 1, it was deemed necessary and beneficial to enclose future payloads in a lightweight but robust frame, with elastic cords for shock absorption. The modular aspect of the SPACE Tesseract comes from it's use of 8 3D printed joints. Each joint acted as a corner of a cube, and had three plus-shaped extrusions for fitting of rectangular balsa wood beams. These beams, once inserted, would be fastened using a nylon bolt. The modularity came in the ability to change the size of the tesseract at any point by swapping different length balsa beams. Further, each corner joint had an interior hook to which elastic coords attached, which then were attached to the payload.
SPACE Mk 1 flew on the first launch of 2015, housing SSI Gen 1 Avionics. It proved to be extremely thermally insulative (more than a styrofoam container) despite not being super air-tight, and allowed the modular swap of raspberry pi cameras, GoPros, logos, note blocks, and blank blocks. It's most profound drawback was its weight -- the total payload weighed in at around 2.5 kilograms. Unfortunately, SPACE Mk 1 flew on a balloon with a failed parachute deployment, resulting in a total loss of the enclosure. Luckily, it's destruction paved the way for a redesign.
SPACE Mk 1 flew on the first launch of 2015, housing SSI Gen 1 Avionics. It proved to be extremely thermally insulative (more than a styrofoam container) despite not being super air-tight, and allowed the modular swap of raspberry pi cameras, GoPros, logos, note blocks, and blank blocks. It's most profound drawback was its weight -- the total payload weighed in at around 2.5 kilograms. Unfortunately, SPACE Mk 1 flew on a balloon with a failed parachute deployment, resulting in a total loss of the enclosure. Luckily, it's destruction paved the way for a redesign.