# Cubesat Tether Deploy

• internal dimensions minus posts and wall thickness
• 1U = 100 × 100 × 99.50 mm, 1.33 kg mass
• 1.5U = 100 x 100 x 156.25 mm, 2.00 kg mass
• 2U = 100 x 100 x 213.00 mm, 2.66 kg mass
• 3U = 100 x 100 x 326.50 mm, 4.00 kg mass
• corner posts are 8.5 x 8.5 mm, and extend 7 mm above and below ends. Assume 1 mm walls. The largest rectangular cavity within a 2U is 83x x 98y x 211z .

Can we roll a 160 mm thinsat to fit a 2U ? Better to assume stiff.

Assume double thickess thinsats - 0.04 g/cm², or 2 g/cm² per 50 thinsats. Assume thinsats, plus center pivot, are 0.4 mm thick. 50 thinsats are 20 mm thick. We could make a stack of thinsats 116 mm on one side - a bit more with curvature - and fit:

Assume 50 thinsats are spaced 1 meter apart on the kevlar cable, and it must support 10 gees during deployment. Assume 500 KYuri design strength. 100 m/s² x 50 m x M(kg) is the force, divided by 500 KYuri, is the scaling factor of thinsat to kevlar: 0.01. Trivial!

Instead, assume we are launching from a tether on a spinning rocket body.

 1U 116 x 97 mm 112 cm² 224 g 1.5U 116 x 154 mm 178 cm² 356 g 2U 116 x 211 mm 245 cm² 490 g