Can private jets fly at night?
To enhance productivity, executives frequently use private jets for early morning and night-time flights. The concept of a jetpack, or rather a rocket pack, using thrust from rocket engines was first conceived by a Russian named Alexander Andreev in 1919. At its essence, the design was simply a rocket motor contained within a backpack.Jet packs have been developed using a variety of mechanisms, but their uses are limited because of factors including the Earth’s atmosphere, gravity, the low energy density of extreme fuels, and the human body not being suited to flight, so they are principally used for stunts.The main issue is fuel efficiency — most jetpacks are not equipped to fly for more than a few minutes, making it difficult for them to get very high.