5. The famous airplane model, Boeing 747, is shown in Figure 5 with 3-dimensional information. If engine 3 suddenly fails, calculate the resultant of the three remaining engine thrust vectors,

each vector has a magnitude of 90kN. Set your own y- and z-axes of the point through which the line of action of the resultant passes. It would be important to the design criteria of performance with engine failure.

Fig: 1

Fig: 2