Enter the variables at left using the same units for all entries.|
For an aircraft to be stable in pitch, its CG must be forward of the
Neutral Point NP by a safety factor called the Static Margin, which
is a percentage of the MAC (Mean Aerodynamic Chord).
Static Margin should be between 5% and 15% for a good stability.
Low Static Margin gives less static stability but greater elevator
authority, whereas a higher Static Margin results in greater static
stability but reduces elevator authority.
Too much Static Margin makes the aircraft nose-heavy, which
may result in elevator stall at take-off and/or landing.
Whereas a low Static Margin makes the aircraft tail-heavy and
susceptible to stall at low speed, e. g. during the landing approach.
*Choose Low Stabiliser Efficiency if the tail is close to the wing's wake
or behind a fat fuselage in disturbed flow.
For wings with two different panels click here
For wings with three different panels click here
For wings with four different panels click here