Initial Version of Missile-SIM for Performance evaluation
Aerodynamic Validation of Missile-SIM for Trajectory
AIM-120C Study using Missile-SIM : Part 1 - Sensitivity
AIM-120C Study using Missile-SIM : Part 2 - Launch Condition
AIM-120C Study using Missile-SIM : Part 2 - Launch Condition - revision
Patch note of Missile-SIM : Guidance Algorithm is added w/ Real-Time plot
W.I.P status of Missile-SIM : Addition of Air-propulsion part 1
W.I.P status of Missile-SIM : Addition of Air-propulsion part 2
AIM-120C Study using Missile-SIM : Part 3 - CUDA / LREW / METEOR types. 1 : Baseline Comparison
AIM-120C Study using Missile-SIM : Part 3 - CUDA / LREW / METEOR types. 2 : Sensitivity Analysis
AIM-120C Study using Missile-SIM : Part 3 - CUDA / LREW / METEOR types. 3 : Few mentions
W.I.P status of Missile-SIM : Addition of 3D Coordinate
W.I.P status of Missile-SIM : Development of Few generic bodies for Further Missile-SIM
1. Modeling of Generic ATACMS missile
After I conducted analysis of Air-to-Air missile series, I should add longer range missiles for my analysis which requires coordinate of surface of the earth. As an example of the GtG missile, ATACMS class is modeled as follows.
Some details are coming from known source of the internet while others are from assumptions.
2. Trajectory Simulation of the generic ATACMS
Based on the modeled missile, I simulated a few trajectory options using Missile-SIM.
1) Short-Ranged Shot (~40km)
From the ground condition(Zero-speed, Zero-altitude), the missile climbed 80deg for 40sec and 45deg for additional 20sec. Then, the missile is sharply fall for 45deg.
From the simple trajectory, missile could achieve 39km of range within 100s. Maximum altitude and speed are 81,000ft and M3.3 respectively. Before the missile fall to 40,000ft, it keep its high speed. However, as the missile re-enter the low-altitude, missile lose its speed significantly even in sharp-angle free-fall.
2) Lofted Shot (~90km)
From the ground condition(Zero-speed, Zero-altitude), the missile climbed 80deg for 40sec and 45deg for additional 40sec. Then, the missile is sharply fall for 30deg. The modified trajectory definitely targeted to longer range via longer climb(+20s) and less sharp falling angle(-15deg).
From the simple trajectory, missile could achieve 90km of range within 184s. Maximum altitude and speed are 135,000ft and M3.3 respectively. Because the missile flight more time in high altitude, range of the missile could be extended to more than two-times of the previous shot. Longer range sacrifices its terminal speed from M2 to M1.7.
From the ground condition(Zero-speed, Zero-altitude), the missile climbed 80deg for 40sec and 45deg for additional 40sec as same as the case of the 2). Then, the missile is cruising for 15deg. The modified trajectory definitely targeted to longer range via much less sharp falling angle(-30deg).
From the simple trajectory, missile could achieve 170km of range within 330s. It is almost same as that of known specification of the ATACMS. Maximum altitude and speed are 135,000ft and M3.3 respectively. There is nothing change in there.
Because the missile flight more time in high altitude, range of the missile could be extended. Longer range sacrifices its terminal speed from M2 to M0.75.
4) Cruising Shot and Terminal Descend (~110km)
From the ground condition(Zero-speed, Zero-altitude), the missile climbed 80deg for 40sec and 45deg for additional 40sec as same as the case of the 2). Then, the missile is cruising for 15deg. The modified trajectory definitely targeted to longer range via much less sharp falling angle(-15deg) for 40sec. In terminal phase, I added 60deg fall phase to preserve the speed of the missile.
From the simple trajectory, missile could achieve 170km of range within 330s. It is almost same as that of known specification of the ATACMS. Maximum altitude and speed are 135,000ft and M3.3 respectively. There is nothing change in there.
Because the missile flight more time in high altitude, range of the missile could be extended while the speed of the missile is kept.
5) JTACMS version as Air-Launched Weapon
Different from the ground condition, air-launched ATACMS was considered for F-16. Because initial altitude(30,000ft) and speed(M0.8) are provided, the missile could reach much higher and faster status than the ground launched one.
From the simple trajectory, missile could achieve 250km of range within 330s. However, compared to its weight to air-launched cruise missile like Storm-shadow or Taurus, its range do not have strong merit over them.
6) Advanced ATACMS (upgraded rocket-motor, I called ATACMS-M)
Using upgraded rocket motor(+20s of ISP), fictional upgrade of ATACMS is tested. It provides higher maximum speed(~M4) and altitude, and they lead longer range than the baseline version of the missile (~270km). It is interesting that the advanced motor give the similar increase provided by the air-launch.
The generic ATACMS model could provide specific flying trajectory, and the model re-enact the performance parameters which are already known. The cruise shot of baseline model can cover the important region near the Seoul while the advanced version can shoot longer shot.
Additionally, air-launched and upgrade version of the missile is considered; the result shows air-launch option is similar to that of 10% increase of ISP.
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