Number of spark plug in each cylinder of general aircraft?
Reference: Piston Archives – Champion Aerospace Why Do Aircraft Engines Have Two Spark Plugs Per Cylinder? | Boldmethod How it works: Spark plugs – AOPA 溫故知新: In general, GA piston aircraft, 每個cylinder 都有兩個 spark plugs Modern airplane engines are required by to have a dual ignition system – that is, two separate magnetos to
Cathay is investing over HK$100 billion to strengthen Hong Kong’s international aviation hub status
https://news.cathaypacific.com/cathay-is-investing-over-hk-100-billion-to-strengthen-hong-kong-s-international-aviation-hub-status?trk=feed_main-feed-card_feed-article-content Cathay Group Chair Patrick Healy said: “With the Three-Runway System soon to propel Hong Kong’s aviation sector into a new age, the coming years are going to be an incredibly exciting time for Hong Kong and for Cathay with ample new opportunities to grow.
Cathay Group orders the A330neo
https://www.airbus.com/en/newsroom/press-releases/2024-08-cathay-group-orders-the-a330neo Toulouse, 7 August 2024 – Hong Kong’s Cathay Group has placed a firm order with Airbus for 30 A330-900 widebody aircraft. The order follows a thorough evaluation by the airline under its mid-size widebody fleet renewal programme. The newly-ordered aircraft will enable Cathay to modernise its earlier generation A330-300 fleet and expand its operations on
Global Navigation Satellite System (GNSS)
#GBAS #GPS #GNSS Reference: https://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/gnss/laas
B777
Cathay B777-300, B777-300ER 77A, 77K, 77P ————————————— 77A Passenger capacity First: 6 (flat bed) Business: 53 (flat bed) Premium Economy: 34 Economy: 201 Total Passengers: 294 77P Passenger capacity Business: 42 Economy: 396 Total Passengers: 438 77K Passenger capacity Business: 40 (flat bed) Premium Economy: 32 Economy: 296 Total Passengers: 368 ————————————— Engine 777-300 :
Two spools v.s Triple spools
References: Difference between Two Spool Engines and Three Spool Engines – FlyFA Aircraft Maintenance Engineering 3-Spool-Engine Concept | aircraftengineering (wordpress.com) What is triple spool design on the RB211? what are the advantages/disadvantages? A 3 spool engine is one that has three sets of compressors before the combustor and three sets of turbines behind it. A
Cooling Methods in Turbine Blades
Reference: Cooling Methods in Turbine Blades | Turbomachinery blog (softinway.com) thermal barrier coating on the turbine blade (Blade Passive Protection) internal cooling – maintains the blade metal temperature below the outside gas temperature by heat transfer to internal cooling air – include convection cooling and impingement cooling, where cooling air runs through channels within the
PUDSUC – 口訣 : pitot static blockages
Reference: Instrument failure: the test of trust | Flight Safety Australia PUDSUC A pitot blockage will cause airspeed to underread on descent (vice versa on climb). A static blockage will cause airspeed to underread on climb (vice versa on descent).
[GA piston engine] What’s full throttle height?
Full throttle height – Depending on the power setting, as an aircraft climbs (fitted with a fixed-pitch propeller), a height is reached eventually where the throttle will be fully open to maintain that power setting. Important concept: An aicraft can have various power setting! Each power setting has a full-throttle height! Read more
[GA Piston Engine] Effect of Increasing Height on Power Output
(On a ‘standard’ day) Aicraft climbs / fly high –> output of the engine decreases for two reasons: decrease in atmospheric pressure – reduces the manifold pressure and thus the flow of air into the cylinders (a similar effect to closing the throttle) – can be compensated for by progressively opening the throttle decrease in
Too lean, Too rich, CCM, Best power, Best economy
Notes: The carburettor measures the weight of air passing through the induction manifold and uses this measurement to regulate the amount of fuel discharged into the air stream (according to a predetermined schedule). What’s rich, lean and CCM? Rich: 1:8 Chemically Correct fuel/air Mixture (CCM): 1:15 Lean: 1:20 In theory, the ‘correct’ quantity
Cathay Stories: A pilot explains the art of the go-around
A pilot explains the art of the go-around | Cathay (cathaypacific.com)
Cathay Stories: Why (and how) we select alternate airports before departure
How we fly: choosing alternate airports | Cathay (cathaypacific.com)
CX fuel – Greener Together: Switching to Sustainable Aviation Fuel (SAF)
Also ref: Cathay Pacific launches Asia’s first major Corporate Sustainable Aviation Fuel (SAF) Programme – Cathay Pacific April 20, 2022 — Cathay Pacific is launching its pilot Corporate Sustainable Aviation Fuel (SAF) Programme, the first major programme of its kind in Asia. The SAF used for the launch of this programme is made from used
