After 35 years in development, the Martin Jetpack will be available to the public in 2017 and will cost around £96,000. The jetpack, which flys for more than half an hour at heights of up to 3,300ft, uses ducted fans and has a top speed of 46mph. This is the world's first practical jetpack and is able to be flown by a pilot or via a remote control. The jetpack can take off and land vertically, and due to its small dimensions, it can op...