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downloads/asterion-fcta-v1.0-public-release/asterion-fcta-v1.0/cad/nx_master_model/model_tree_plan.md

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+# NX Master Model Tree Plan
+
+1. Part attributes and units
+2. Global expressions
+3. Absolute coordinate system
+4. Vehicle centreline
+5. Station datum planes
+6. Ring rotation axes and envelope sketches
+7. Spine and service-tunnel envelopes
+8. Solar-array hinge axes and swept envelopes
+9. Radiator hinge axes and swept envelopes
+10. Propulsion-pod coordinate systems and plume cones
+11. Docking envelopes
+12. Skimmer body and control-surface envelopes
+13. Maintenance and keep-out zones
+14. Interface points and bolt-circle sketches
+15. Published geometry for WAVE linking
+
+## Modelling rule
+
+Detailed parts must consume published geometry from the skeleton. They should not drive the master model.

downloads/asterion-fcta-v1.0-public-release/asterion-fcta-v1.0/cad/nx_master_model/nx_expressions.txt

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+# ASTERION NX MASTER MODEL EXPRESSIONS — VERSION 0.1
+# Units should be assigned explicitly in NX.
+
+vehicle_length = 42000 mm
+spine_length = 42000 mm
+spine_outer_radius = 900 mm
+spine_truss_radius = 1200 mm
+
+ring_outer_diameter = 26000 mm
+ring_outer_radius = ring_outer_diameter / 2
+ring_occupied_radius = 12000 mm
+ring_width = 3200 mm
+ring_depth = 2800 mm
+ring_sector_count = 12
+ring_sector_angle = 360 deg / ring_sector_count
+ring_spacing = 5000 mm
+ring_rotation_speed = 4.3 rpm
+ring_target_gravity = 0.25
+
+solar_wing_count = 4
+solar_wing_length = 20500 mm
+solar_wing_width = 4200 mm
+solar_hinge_offset = 8500 mm
+solar_deployed_span = 58000 mm
+
+radiator_count = 6
+radiator_length = 9000 mm
+radiator_width = 2800 mm
+radiator_deploy_angle = 70 deg
+
+propulsion_pod_count = 6
+thrusters_per_pod = 2
+thruster_cant_angle = 3 deg
+propulsion_frame_station = -16000 mm
+
+skimmer_length = 8000 mm
+skimmer_width = 5500 mm
+skimmer_height = 2100 mm
+skimmer_dock_station = 21000 mm
+
+module_pitch = 2500 mm
+primary_docking_diameter = 1600 mm
+service_tunnel_diameter = 1200 mm
+
+# Station coordinates along +X
+sta_00 = -21000 mm
+sta_10 = -16000 mm
+sta_20 = -8000 mm
+sta_30 = -2500 mm
+sta_40 = 2500 mm
+sta_50 = 9000 mm
+sta_60 = 15000 mm
+sta_70 = 21000 mm