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Fig. 5. Mean peak force from 42 measurements from six Canton-S (CS) flies as the
angle between coxa and tibia was adjusted. The peak isometric force is
constant at
100 µN from 75120° and then declines to zero
force at 160°. At this angle, it was hard to adjust the micromanipulators
holding the fly without distortion of the joints, which accounts for the large
standard error.