The design report

Preliminary and Detailed Design 4
Structure layout, initial sizing, and internal layout Design 4.1
Wing structure 4.1.1
The internal structure of the wing is one of the most important sections of the aircraft
since the wing carries most of the load as lift is produced. The location of ribs, spars,
webs, rods is important for the structural integrity of the aircraft.
It was suggested by the professor that distance between ribs should be approximately
8-10cm. It was identified that the distance has to be variable as certain areas of the wing
were to be placed under significantly more loads. These sections were on top of both
fuselages as the weight of the fuselages would cause excessive loads and hence a
reduced distance between the ribs would be ideal to transfer the load. The 6 types of
ribs used in the wing are shown in figures 4.1.101 to 4.1.106. Weight reduction was
achieved by cutting un-required parts in the middle. To maintain structural integrity of
the rib, a distance of 8mm was kept for each hole from the edge.
Figure 4.1.101 Figure 4.1.102
Figure 4.1.103 Figure 4.1.104