Consult the literature to find information on the significance and numerical values of the helix...

Question

Consult the literature to find information on the significance and numerical

values of the helix angle achieved by different types of fighter aircraft. Find

some graphs of roll rate versus equivalent airspeed and calculate some values

of helix angle. Explain the shape of the graph.

Robert · Accepted Answer

Solution
The dynamics of a rolling aircraft is a complex phenomenon which arises due to the creation of asymmetric lift distribution in the wingspan.  When the aileron deflects down it increases the wing camber and the coefficient of lift; this in turn raises the opposite aileron to reduce this camber and coefficient of lift. These deflections and resulting spanwise asymmetry results in the rolling moment. The angle formed between the flight path of aircraft and resultant flight path of the wingtips is known as the roll helix angle. This angle increases with the increasing aileron displacement and the maximum value of helix angle depends on the design and mission of the aircraft.

Consult the literature to find information on the significance and numerical values of the helix angle achieved by different types of fighter aircraft. Find some graphs of roll rate versus equivalent...

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