By Hannes Stephan Griebel
Hannes Griebel stories area purposes for the hypersonic drag balloon (ballute), particularly emergency low Earth orbit restoration and supplying payloads to excessive altitude touchdown websites on Mars. the writer discusses the speculation in the back of any such undertaking in addition to adventure won in the course of its sensible implementation, equivalent to venture layout, production, packing and deployment concepts in addition to floor and flight exams.
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Additional info for Reaching High Altitudes on Mars With an Inflatable Hypersonic Drag Balloon
For all approximate ana1ytical methoda, Ibis may safely be aasumed, however. For the full six-degree-of-fteedom model, the equations of motion beve to be expanded to account rar cross-track deviation duc to wind, planetary rotation and the spacecraft rotation. If the vemcle lOHs to one side, the lift vector gets a y-component and thus causes a cross-tmck deviation. An extensive and very good treatment offull six-degree-of-freedom models can be found in refereoce . 3 About Atmoaphere Models snd Thelr SuItabIlIty Before we begin any analysis in greater detail, it is practical to review available atmosphere models and their suitability for high altitude entry studies.
Motors' full size models . The ACRS consisted of two modules: a simple single stage system for the driver instaUed in the steering wal hub (Fig. 2 About Automatie Inflatablcs 7 pusengers installed above the right pusqer's knees (see Fig. 2). The:inflation gas for the drivcr CIIIlC from a gaa gcocrator cartridgc. wo individually con1rolled gas Senerators. on and magnitudc of. collision cvcnt ~eeded predefined limitI, the control module would 1ligget pressuriz:ation of 1be air cushions . Dcpcnding on thc scvuity of thc impact, cithcr Olle or botb gas scnerator cart:ridgcs wcrc triggercd m booIII: thc prcuurc bottIe'.
This mass difference can be used by a payload. Because the vehicle creates buoyancy and does not need air flowing around it to generate lift, it is also referred to as "static"lift. Lighter-than-air vehicles can again be divided into two main categories: Zero-pressure designs and overpressure designs. 1 the bottom) and therefore maintain pressure equilibrium with the surroundings. The lower density of the inflation gas (often enough the same as the ambicnt gas in which the vehicle floats) is created through heat A typical example would be a hot-air balloon.