![A mathematical model of a twin ducted-fan vertical takeoff and landing jetpack - Michael Speck, Jörg Buchholz, Mathieu Sellier, 2014 A mathematical model of a twin ducted-fan vertical takeoff and landing jetpack - Michael Speck, Jörg Buchholz, Mathieu Sellier, 2014](https://journals.sagepub.com/cms/10.1177/0954410013503060/asset/images/large/10.1177_0954410013503060-fig1.jpeg)
A mathematical model of a twin ducted-fan vertical takeoff and landing jetpack - Michael Speck, Jörg Buchholz, Mathieu Sellier, 2014
![Val testing her new nuclear-powered ducted fan 'jetpack', complete with useless spinny thing. : r/KerbalSpaceProgram Val testing her new nuclear-powered ducted fan 'jetpack', complete with useless spinny thing. : r/KerbalSpaceProgram](https://external-preview.redd.it/QMjivNY96UzmOuhkkVCW6w_kWNaaRRcNzGhlaZz4z5E.jpg?auto=webp&s=8b12b1278502dc5754407b8ae77a71d86f9a564c)
Val testing her new nuclear-powered ducted fan 'jetpack', complete with useless spinny thing. : r/KerbalSpaceProgram
![The Design, Theory, and Development of the Flight Envelope for a Twin-Ducted-Fan Jetpack | Semantic Scholar The Design, Theory, and Development of the Flight Envelope for a Twin-Ducted-Fan Jetpack | Semantic Scholar](https://d3i71xaburhd42.cloudfront.net/4b11f944983c17ee7a92e82f64d7eb79d6aa63e3/19-Figure1.4-1.png)