![]() ![]() Additionally, the UK Ministry of Defence has improved the payload performance of weapons-as this was previously a weak point for vertical landings-through the use of thrust vectoring. The F-35B is well-known for its short takeoff and vertical landing (STVL) capabilities, which are supported by thrust vectoring technology. The Lianistry of Defence has led the development of shipborne rolling vertical landing (SRVL) technology for F-35B carrier aircraft landing, and thrust vector control has been applied to improve the performance of a damaged fighter. In history, there have been attempts to apply thrust vectoring for the takeoff and landing of the Harrier aircraft. Integrated thrust-vector (ITV) control technology has been widely used in post-stall envelope expansion by implementing the engine nozzle. Thrust vector control has been extensively researched, with several notable advancements. Finally, a Monte Carlo simulation is conducted to evaluate the effectiveness and robustness of the short-landing strategy, and the landing accuracy is assessed using the circular error probability metric. This paper provides a detailed description of the short-landing strategy, including the control objectives for each phase. Additionally, a flight boundary protection method is employed which includes an additional command value of the angle of attack, resulting in a higher probability of a successful landing. To ensure flight safety, the attainable linear and angular acceleration is calculated through a trim analysis to determine the command value of velocity and angle of attack during a short landing. The extended state observer (ESO) is integrated into the inner angular rate control and outer sink rate control to account for environmental disturbances and model uncertainties. To address this challenge, this paper proposes a short-landing strategy that employs mixed control using lift fans, thrust vectors, and aerodynamic control surfaces. The process is further complicated due to the need to switch between multiple control modes, while also ensuring the protection of the flight boundaries from environmental disturbances and model uncertainties to ensure flight safety. Your RO badge I think it?s safe to say is an original but may date post war.Īgain these are just my opinions and I don?t mind if someone can prove me wrong.The task of achieving a safe and short landing for a flying-wing unmanned aircraft with a three-bearing-swivel thrust vector is highly challenging. Not a great sign of being fake I agree but I think it?s unusual to find so many mint examples of this type of badge. There would have been no reason to still make these badges post war and yet these two badges have exactly the same type of construction as the other two so I believe all four of mine are duff repros.Ģ) The other reason is that I have seen a few of this type of wing (with the black fabric backing) but none have ever shown any sign of ever having been worn. ![]() Both the WAG and Observers badges were replaced by other badges before the end of the war (the Observers in 1942) and they would not have been used post war. 1) the construction is not like any of the original WW2 badges I have seen in the flesh. But I believe the type of wing shown in post 15 & 16 are reproductions. I?ll start this off with the caveat that I am no expert when it comes to these wings. ![]()
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