Phase II Final Report - NASA's Institute for Advanced Concepts

Planetary Exploration Using Biomimetics
An Entomopter for Flight on Mars
3
2.5
2
1.5
Coefficient of Lift (CL)
1
0.5
0
0.000 0.020 0.040 0.060 0.080 0.100 0.120 0.140 0.160 0.180
-0.5
Case24
Case23
-1
-1.5
-2
-2.5
Time (t) in secs
Figure 3-130: Variation of Lift Coefficient with Flapping Frequency
It can be seen that by increasing the flapping frequency the net lift coefficient has increased,
although in the down beat, it reduces the lift coefficient, but the overall effect is still positive.
d. Keeping all variables constant and just changing the flapping amplitude results in that
which is depicted in Case 25 and Case 26 of design-of-experiments array. The results are
shown in Figure 3-131
148
Phase II Final Report