(Engine) Roughness

[Ref. Pilot’s Handbook of Aeronautical Knowledge, FAA-H-8083-25B Page 7-9, 7-19] Roughness normally is due to spark plug fouling; Both over-rich or over-lean mixture can cause engine roughness   Over-rich mixture induced roughness?! Why it happens? (over-rich mixture → excessive carbon buildup → spark plug fouling → roughness) Roughness is normally caused by over-rich mixture, which […]

Trim Systems

[Ref Pilot’s Handbook of Aeronautical Knowledge, FAA-H-8083-25B Page 6-10, FAA-H-8083-31A, Aviation Maintenance Technician Handbook-Airframe Volume 1 Page 1-32] Common types of trim systems include : trim tabs   (trim off the force to realise “hands off” flying) balance tabs  (reduce the control force) servo tabs   (on large aircraft as a backup method to move […]

V-tail

[Ref Pilot’s Handbook of Aeronautical Knowledge, FAA-H-8083-25B Page 6-8] What’s V-tail design? two slanted tail surfaces (fixed surface) + ruddervators (movable surfaces) V-tail design utilizes two slanted tail surfaces to perform the same functions as the surfaces of a conventional elevator and rudder configuration. The fixed surfaces act as both horizontal and vertical stabilizers; The movable […]

canard

[Ref Pilot’s Handbook of Aeronautical Knowledge, FAA-H-8083-25B Page 6-7] What’s canard? Canard is an airfoil similar to the horizontal surface on a conventional aft-tail design. The canard design utilizes the concept of two lifting surfaces.   Function of canard? The canard functions as a horizontal stabilizer located in front of the main wings. The difference is that […]