Why Does The Horizontal Stabilizer Have a Fuel Tank
August 18, 2024
The A330 is equipped with this feature to get better performance, in terms of fuel consumption as well as range. The A330 has the onboard flight computer to auto shift the fuel from the main tank to the tail tank (on horizontal stabilizer). The make the CG shifting backward to reduce the tail-down force.
Endurance? Range?
August 18, 2024
Range is affected by: fuel on board fuel flow (how fast the fuel is burnt)! Fuel flow increase (i.e burn more fuel) –> range will reduce. Range can be said as the distance the aircraft can go per unit of fuel ( Distance NM/ Fuel kg) Range can be translated into specific range
Cost Index (CI)
August 18, 2024
Also take reference: https://skybrary.aero/articles/cost-index http://www.boeing.ch/commercial/aeromagazine/articles/qtr_02_10/pdfs/AERO_FuelConsSeries.pdf Cost Index is the ratio of all costs other than fuel and the fuel costs. The lower the CI, the more “importance” the machinery places on saving fuel. Low cost indexes will result in lower climb speed, (both indicated and mach), lower cruise speed, a generally higher cruise altitude, a
Number of spark plug in each cylinder of general aircraft?
August 11, 2024
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
August 9, 2024
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
August 7, 2024
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)
August 6, 2024
#GBAS #GPS #GNSS Reference: https://www.faa.gov/about/office_org/headquarters_offices/ato/service_units/techops/navservices/gnss/laas
B777
August 4, 2024
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
August 4, 2024
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
August 4, 2024
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
August 4, 2024
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?
August 3, 2024
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
