The Dassault Mirage 2000-5 replica is uploaded to the Steam Workshop here . About the payload induced CoM shift, my solution is to add negative power water cannons (nives) inside the missiles' rockets. They are bound to the same key as the plane's engine. The thrust of the nives negates the pitch down effect. And when a missile is launched the heated nives gives extra boost. These special missiles work perfectly. The only drawback is the one extra block. #

 As I struggled to make this plane fly right, I discovered a method to shift the center of lift (CoL). In the previous post I wanted to balance the torque generated by the lift propeller blocks (CoL) and the flat propeller blocks (CoA). now I have a promising trick to solve the problem. Have a look at the pictures bellow. By raising the thrust, the CoL can be moved forward. low thrust axis generates torque for pitch up  thrust axis that go through the center of mass generates no torque move CoL forward to balance it out raising the thrust axis move the CoL to balance it out. In the case of my Mirage 2000, the situation might be the same as the first picture. When speed increases, the torque generated by CoL and CoA goes up while the torque from the thrust axis stays the same, causing the plane to pitch down. I'm very happy to find a generalized method for Besiege plane tuning. There's still the plane balance problem when carrying p...

Notes of Delta Wing Tuning I built this plane twice. The first one has stability problem and didn't look quite right so I built another. Here is the stability problem. It flies alright at medium speed but pitches down badly at high speed. I thought positions of the center of lift (CoL) and the center of aerodynamics (CoA) was the problem. While I usually build the whole plane with flat propeller blocks then add 20° lift propeller blocks after, CoL and CoA are clearly separated. In this case CoA is decided by flat propeller blocks and CoL is decided by the lift propellers. Note that lift will increase as the speed builds up. So when the CoL is ahead of the CoA, it should pitch up at high speed, while is CoL is behind CoA it should do the opposite. My plane might be the latter. pitches up pitches down might be balanced So I came up with this solution, angling up some of the flat propeller block in the front. The new plane flies okay now. In theory it...