What is reentry vehicle?
re-entry vehicle. noun. the portion of a ballistic missile that carries a nuclear warhead and re-enters the earth’s atmosphere.
What are reentry vehicles made of?
Depending on the experiment weight, the capsule weight varied from 431 to 522 kg. The reentry vehicle consisted of a bowl-shaped fibrous glass heat shield 101.6 cm in diameter. It contained the thrust cone assembly, the recovery capsule, tracking equipment, and the parachute assembly.
Why are reentry vehicles blunt?
The region just behind the wave is a substantial region of subsonic flow. Since these shock waves cause smaller heating of the vehicle than the airflow, the nose of reentry vehicles are made blunt. This causes most of the heat dissipated to surrounding air without transferring through the vehicle structure.
What is a V gamma map?
ABSTRACT. The V-Gamma map consists of all possible pairs of speed (V) and flight path angle (Gamma) at atmospheric entry interface for accidental Earth reentries resulting from steady misaligned bums, incomplete burns, or no burn.
What is Marv missile?
The Maneuverable Reentry Vehicle (abbreviated MARV or MaRV) is a type of ballistic missile whose warhead is capable of autonomously tracking ground targets.
How does a typical space capsule return to Earth?
A reentry capsule is the portion of a space capsule which returns to Earth following a spaceflight. Because a capsule shape has little aerodynamic lift, the final descent is via parachute, either coming to rest on land, at sea, or by active capture by an aircraft.
What is the temperature of reentry?
During re-entry, the shuttle is going so fast, it compresses the air ahead of it. The compression of the air layers near the leading edges of the shuttle is quick, causing the temperature of the air to rise to as high as 3000 degrees Fahrenheit! Being in contact with the shuttle, it heats the shuttle’s surface.
What is Post Boost Vehicle?
The Post Boost Vehicle is comprised of a gas storage assembly, two propellant storage tanks containing a hypergolic mixture of nitrogen tetroxide as the oxidizing agent and monomethylhydrazine as the fuel, a gimbal axial engine, a total of 10 attitude controlled engines, all of which are interconnected to the …
Why do missile have multiple warheads?
Several small and lower yield warheads cause much more target damage area than a single warhead alone. This, in turn, reduces the number of missiles and launch facilities required for a given destruction level – much the same as the purpose of a cluster munition.
What is the re-entry vehicle of an ICBM?
The re-entry vehicle (RV) of an Intercontinental Ballistic Missile (ICBM) has even tighter accuracy requirements. To meet these constraints, we must again adjust the trajectory and vehicle design. On the other hand, if a vehicle can land in a larger area, the accuracy constraint becomes less important.
How does a re-entry vehicle differ from a meteor?
With most of its velocity lost, the deceleration is much lower—it takes 20 seconds more to slow down by another 1000 m/s. Of course, unlike the meteor, in establishing a trajectory for a re-entry vehicle, we must keep the vehicle intact. Thus, we must trade deceleration, heating, and accuracy to calculate the correct trajectory for each vehicle.
What is the re-entry path path angle γ?
The re-entry flight-path angle, γ, is the angle between local horizontal and the velocity vector. Figure 4.1.7-5. Signi ficant Forces on a Re- entry Vehicle. A re-entry vehicle could poten- tially encounter lift, drag, and gravity forces.