The panel substrate is a sandwich structure with high modulus CFRP skins and Aluminum honeycomb core and is locally reinforced at the hinges (edgemembers) and holddowns (plugs). All suppliers use a secondary bonding method for manufacturing; their substrates are interchangeable.
The V-shaped yoke uses a spring driven root hinge with latches, eddy current speed limiter and S/C interface connector. It is riveted to CFRP arms on which the electrical harness is routed and thermal protection (project specific) is applied.
All panel hinges are clock spring driven. Their latches, close tolerance journal bearing and bolted panel connections, give high stiffness and low hysteresis. A system of pulleys and Kevlar cables between adjacent hinges control the trajectory of the deploying wings.
Flexprints are applied between panels. These flat, double isolated flexible electrical circuits are connected to dedicated flexprint connector parts, which are bolted to the edge members of neighbouring panels.
The Photo-Voltaïc Assembly is specific for each application, due to strongly varying power subsystem demands. So far, compatibility has been demonstrated with:
- AZUR 3G30 150µm with integral diode 80x40mm²
- AZUR 3G30C LARS 150µm with integral diode 124x60mm²
- Spectrolab XTJ with external protection diode
SolAero ZTJ with integral and external diodes