Part 1
By Ghislain Ruy, F1HDD
Translation Fred, CU8AO

Initially, the Nanosat has been designed to be carried comfortably in a shuttle or a Soyuz , to be launch by hand during an EVA. To install it on a launcher was another story.

The initial thermal concept, relatively simple, is disturbed by his location on the ASAP: the illumination is not controlled and can be anywhere from the 0 to 50% of the orbital time. Obviously, in those conditions, a wide temperature range is to be expected, with an unknown final result, as depending of the final attitude of the 3rd stage, once his dynamical equilibrium is achieved. This is explained further.

The vibrations at the time of the launch are another problem and the requirements to qualify to flight are impressive.
The figures below comes from the user manual of the ASAP4 (it is really 15g rms).

 

The prototype design is changed and improved to comply with these requirements. The first 10 batteries are fixed directly on the bottom of the box, separated from it by a 15/10-epoxy board for thermal isolation. The 2 remaining batteries will be fixed on the hardware supporting the electronics.
This is done with a glass epoxy and aluminium structure, "floating" on 1.5 mm thick silicone rubber shock absorbers, between it and the box.

[vue SW et photo de la structure interne]

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