Fuel Contamination

[Ref. Pilot’s Handbook of Aeronautical Knowledge, FAA-H-8083-25B Page 7-27, 7-28] Accidents attributed to powerplant (engine) failure from fuel contamination have often been traced to : Inadequate preflight inspection by the pilot Servicing aircraft with improperly filtered fuel from small tanks or drums Storing aircraft with partially filled fuel tanks Lack of proper maintenance Water is […]

Stall strips : Stalling at the wing root first

[Ref The Pilot’s Manual PM2 Ground School Page 46, FAA-H-8083-25B Page 5-25, Wiki, Boldmethod] Stall strips  is a fixed device employed on the leading edge of fixed-wing aircraft to introduce a stall prematurely Stall strips are used to initiate flow separation at chosen locations on the wing during high-angle of attack flight, they act as a warning […]

Whether long wing span is better or not?

Before we go into the conclusion, we should understand that sometimes longer wing span is not necessarily make impact,  but in particular aspect ratio, it does has certain effects. Aspect ratio ∝ Adverse yaw effect Aspect ratio ∝  weight of the wing structure However… Aspect ratio ∝ 1/ Wingtip vortices

pressure-type carburetors ≠ fuel injection system

[Ref. Pilot’s Handbook of Aeronautical Knowledge, FAA-H-8083-25B Page 7-8] This article aims to point out that pressure-type carburetors is different from fuel injection system. pressure-type carburetors ≠ fuel injection system There are two common types of carburetor System – 1) Float type and 2) Pressure type Pressure-type carburetors discharges fuel into the airstream at a […]

Air Density

[Ref. Wiki, Pilot’s Handbook of Aeronautical Knowledge, FAA-H-8083-25B Page 4-4] The air density, density of air or atmospheric density, denoted ρ (Greek: rho), is the mass per unit volume of Earth’s atmosphere. 3H , low(er) air density – Hot High Altitude Humid Air density changes with variation in actual height (altitude), temperature and humidity. At 1013.25 hPa […]

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 […]