Besiege --- Mirage 2000 Notes #2

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 payload under wings. Wish me luck!

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