Re: How do you launch 64 satellites from a single rocket?
Spring loaded - the satellites are loaded into spring loaded boxes and the door on the end is opened.
The standard CubeSat deployment box can handle satellites that are 1U (10x10x10cm) 2U(20x10x10cm) or 3U (30x10x10cm). One deployment box can handle 3U in total (one 3U or 1 1U and 1 2U or 3 1U). Multiple deployment boxes can be carried to allow for deployment of multiple satellites. Unlike the deployment mechanisms for bigger (and much more expensive) satellites, these simple deployment boxes usually leave the CubeSats tumbling after release.
(CubeSats are limited to 1.33kg/2.66kg/4kg for 1U/2U/3U sizes)