Control was by differential motion of the wings; the tailfins were fixed.
2.
Differential motion forces the interleaved discs to move through the fluid against each other.
3.
If the gas or liquid is very viscous ( resulting in turbulent differential motion ), the reversal of the magnetic field may not be very periodic.
4.
And it allows for the differential motion of those individual creatures that are situated at different points in the aggregation . talk ) 18 : 27, 24 January 2010 ( UTC)
5.
It is this type of differential motion that allows the iris to be positioned in any area of the optical axis in the lens, and do it in the smallest possible space.
मोबाइल