NASA’s Low-Earth Orbit Flight Test of an Inflatable Decelerator, or LOFTID, is demonstrating a cross-cutting aeroshell — a type of heat shield — for atmospheric re-entry.
For destinations with an atmosphere, one of the challenges NASA faces is how to deliver heavy payloads (experiments, equipment, and people) because current rigid aeroshells are constrained by a rocket’s shroud size.
One answer is an inflatable aeroshell that can be deployed to a scale much larger than the shroud.
This technology enables a variety of proposed NASA missions to destinations such as Mars, Venus, Titan as well as return to Earth.
When a spacecraft enters an atmosphere, aerodynamic forces act upon it. Specifically, aerodynamic drag helps to slow it down, converting its kinetic energy into heat.
Utilizing atmospheric drag is the most mass-efficient method to slow down a spacecraft.
The atmosphere of Mars is much less dense than that of Earth and provides an extreme challenge for aerodynamic deceleration.
The atmosphere is thick enough to provide some drag, but too thin to decelerate the spacecraft as quickly as it would in Earth’s atmosphere. LOFTID’s large deployable aeroshell — an inflatable structure protected by a flexible heat shield — acts as a giant brake as it traverses the Martian atmosphere.
The large aeroshell creates more drag than a traditional, smaller rigid aeroshell.
It begins slowing down in the upper reaches of the atmosphere, allowing the spacecraft to decelerate sooner, at higher altitude, while experiencing less intense heating.
5 ：：2022/11/10(木) 21:23:41.93 ID:54V3KU7J0.net
61 ：：2022/11/11(金) 00:38:44.60 ID:01YTYg7/0.net
20 ：：2022/11/10(木) 21:32:09.84 ID:cXVpjohU0.net
59 ：：2022/11/10(木) 23:39:39.96 ID:0z0gcw/r0.net
62 ：：2022/11/11(金) 02:09:13.73 ID:OGp3KgwV0.net
52 ：：2022/11/10(木) 22:58:51.81 ID:0p+avFTM0.net
3 ：：2022/11/10(木) 21:23:12.89 ID:H/TaT2m90.net
72 ：ラダームーンサルト(ジパング) [ﾆﾀﾞ]：2022/11/11(金) 06:42:25.56 ID:nBDTin2R0.net
38 ：：2022/11/10(木) 21:58:15.55 ID:YhXssOPF0.net
71 ：トラースキック(図書館の中の街) [ﾆﾀﾞ]：2022/11/11(金) 06:36:14.97 ID:DtoIiu4V0.net
4 ：：2022/11/10(木) 21:23:30.74 ID:nhiu1MTT0.net
41 ：：2022/11/10(木) 22:04:54.16 ID:NUOh5tLH0.net
24 ：：2022/11/10(木) 21:33:32.10 ID:NUOh5tLH0.net