ARISSat-1 Solar Panel Covers Bob Davis Ken Blake 9:30pm Sept 13, 2009

Inhibits for Solar Panel Covers Six Covers: 18” x 9.75” x 1/8” thick (469.9 x 247.65 x 3.17 mm) aluminum 3 inhibits: Four T-handle quick-release pins with lanyards Velcro straps around Covers Velcro squares to Solar Panel

ARISSat-1 with Solar Panel Covers Top Iso View +Z -Y -X

ARISSat-1 with Solar Panel Covers Bottom Iso View -X -Y -Z

Side View of Handle With Covers Without Covers Strap Strap Top & Bottom Plates protrude at Vertical Angle to prevent strap from sliding up or down off the corner With Covers Without Covers Strap Strap

+Y Solar Panel Cover Exterior (some details vary panel to panel) Finger Loop Finger Loop Loop Loop Fabric Strap Velcro Pouch or flap To store T-handle Quick-release pins Velcro Loop Loop Fabric Strap Finger Loop Finger Loop

Solar Panel Cover Interior Hooks Hooks Hooks Hooks Hooks Hooks Hooks Hooks Hooks Hooks

Solar Panel Exterior Perimeter pile (captures glass if cells are broken) Perimeter pile (captures glass if cells are broken) Perimeter pile (captures glass if cells are broken) Perimeter pile (captures glass if cells are broken)

Covers Are Strapped Together +Z -Y +X +Y -X -Z

Fabrication Tasks AMSAT-NA makes Covering drawing AMSAT-NA fabricates ground Covers and tether of quick release pins Energia fabricates flight Covers and tether of quick release pins AMSAT-NA adds velcro to Solar Panels Energia make and install these on Covers: Velcro squares for installation Velcro squares or straps for “stacking” the Covers as they are removed 2 long fabric straps (have loop at one end and velcro at the other end) 2 short fabric straps (have loop at both ends) Finger loops (at corners) Pouch or flap to store quick release pins If time permits, Energia ship Covers back to AMSAT-NA for vibration testing on spacecraft Otherwise, AMSAT-NA uses a different set of Covers without velcro for testing

Cover Procedure (IVA) Remove all or half of the 4 pins per each of 6 Covers. Place pins in respective Panel’s pouch or under flap. Exit through Hatch. (EVA) Remove remaining 2 pins per each of 6 Covers (if required). Place in respective Cover’s pouch or under flap. Remove long strap holding +Z Top Cover. Do not remove the 2 short straps which form hinge. Pull +Z Top Cover (additional velcro), rotate, and secure back-to-back against adjacent Side Cover. Remove long strap holding –Z Bottom Cover. Do not remove the 2 short straps which form hinge. Pull –Z Bottom Cover (additional velcro), rotate, and secure back-to-back against adjacent Side Cover. Release ends of straps holding Side Covers (the overlap is at corner –X –Y). Pull Side Cover (additional velcro), rotate and secure back-to-back against adjacent side Cover. Repeat step 9 for remaining side Covers.

Photos of Procedure Steps (using Bob’s foam mockup; to be added late Monday)