Drone Launched Short Range Rockets

Abstract

A concept of drone launched short range rockets (DLSRR) is presented. A drone or an aircraft rises DLSRR to a release altitude of up to 20 km. At the release altitude, the drone or an aircraft is moving at a velocity of up to 700 m/s and a steep angle of up to 68° to the horizontal. After DLSRRs are released, their motors start firing. DLSRRs use slow burning motors to gain altitude and velocity. At the apogee of their flight, DLSRRs release projectiles which fly to the target and strike it at high impact velocity. The projectiles reach a target at ranges of up to 442 km and impact velocities up to 1.88 km/s. We show that a rocket launched at high altitude and high initial velocity does not need expensive thermal protection to survive ascent. Delivery of munitions to target by DLSRRs should be much less expensive than delivery by a conventional rocket. Even though delivery of munitions by bomber aircraft is even less expensive, a bomber needs to fly close to the target, while a DLSRR carrier releases the rockets from a distance of at least 200 km from the target. All parameters of DLSRRs, and their trajectories are calculated based on theoretical (mechanical and thermodynamical) analysis and on several MatLab programs.

Economic risk assessment of ammonium nitrate explosions at the Busan Port by determining the building damage using a 3D explosion simulation

“…According to the Korea Fire Institute National Hazard Material Information System, ammonium nitrate is a first-class hazardous material and oxidative solid. The properties of ammonium nitrate are listed in Table 2 [ 1 , 6 , [29] , [30] , [31] ].…”

Electric Rocket Launcher Aircraft—Drone-Launched Short Range Rocket System

“…The present work is concerned with the discussion and supporting calculations of the concept of a system composed of a vertical rocket launcher aircraft (RLA) and dronelaunched short range rockets (DLSRRs). The concept has been suggested and discussed by the author in two previous works [1,2]. First, the RLA raises one or more DLSRR to a high altitude and fires them with high initial velocity.…”

“…An RLA-DLSRR system can also be seen as a military rocket with a reusable first stage. The RLAs and DLSRRs discussed in [1,2] use conventional rocket engines. In the present work, the rocket engines are different, i.e., they are such that the fuel is pumped into the combustion chamber by an electric motor.…”

“…State-of-the-art short range ballistic missiles are very costly. Namely, the cost of delivering a payload to the target using ATACMS is $2700 per kg for a target at a distance of 165 km and $6500 per kg for a target at a distance of 300 km [2,3]. The cost of delivering a payload to a target at a distance of 500 km using a liquid propellant Dong-Feng 15 rocket is $6700 per kg.…”

“…Since then the cost of payload orbital delivery fell by a factor of five [5]. Military rockets with reusable first stages have not been introduced in practice yet, but they have been considered by the author in previous works [1,2].…”