What’s CAVOK , What’s NCD, NSC
March 28, 2024
Reference source: https://skybrary.aero/articles/weather-observations-aerodromes CAVOK The visibility, RVR, weather and cloud groups are replaced by CAVOK (Cloud And Visibility OK) when the following conditions exist simultaneously: If there is no cloud below 5000 ft or below the highest minimum sector altitude (whichever is greater) and there is no towering cumulus or cumulonimbus, ‘NSC’ is reported. Note:
一次搞懂 Minimum Safety Altitude, Decision Height and “Go-around Decision Point”
March 26, 2024
Reference : Skybrary，Boldmethod 話說今晚又飛機友聚會攞到d 靈感，今晚就學幾個生字啦~ Decision Altitude/Height (DA/DH) https://skybrary.aero/articles/decision-altitudeheight-dadh Definition The Decision Altitude (DA) or Decision Height (DH) is a specified altitude or height in the Precision Approach or approach with vertical guidance at which a Missed Approach must be initiated if the required visual reference to continue the approach has not been established. (ICAO Annex 6) Decision altitude (DA) is
How to pronounce “ARFF” – Aircraft Rescue and FireFighting
March 25, 2024
What’s landing gear bogie?
March 24, 2024
Reference: FAA Aviation Maintenance Technician Handbook-Airframe Volume 2 Chapter 13, https://en.wikipedia.org/wiki/Undercarriage_arrangements Multiple wheels spread the weight of the aircraft over a larger area. They also provide a safety margin should one tire fail. Heavy aircraft may use four or more wheel assemblies on each main gear. When more than two wheels are attached to a
Aircraft Recognition
March 24, 2024
Reference source: https://www.aircraftrecognitionguide.com/ The parts of an aircraft that can be used for recognition: Nose Landing gear Tail cone Wing Engine B777 B777 major feature: flat, squared off tail cone Boeing 777 has six wheels per leg (main landing gear) typical flat, squared off tail cone Boeing 777-200, -200ER and 300 are not raked
Service ceiling v.s Absolute altitude
March 24, 2024
Service ceiling 指飛機無再多MAP for climb; Critical altitude 指turbocharged engine 發揮最大壓縮空氣能力既高度 As a normally aspirated aircraft climbs, it eventually reaches an altitude where the MAP is insufficient for a normal climb. This altitude limit is known as the aircraft’s service ceiling Critical altitude is the maximum altitude at which a turbocharged engine can produce its rated
Six pack
March 23, 2024
Reference: https://www.airpowerinc.com/six-pack-aircraft-instruments Six pack: is a terms referring the six basic instruments that a pilot must know! From the top, on the most left is the Airspeed indicator (ASI), the Attitude indicator (AI) is in the middle, and the Altimeter (Alt) on the right At the bottom, on the most left is the Turn coordinator
What’s Wing Camber, What’s Chord line?
March 23, 2024
What’s Wing Camber? Ans: curvature of the aerofoil (wing) maximum distance between the mean camber line and the chord line Mean camber line : imaginary line equidistance between the upper and lower surface of the wing, joining from the leading edge to trailing edge. What’s Chord line? Ans: imaginary line joining from the
Learn from mistake: American Airlines Flight 965
March 23, 2024
Swiss cheese model – 爆穫吾會只係衰一樣 … The Swiss cheese model is not uncommon to be used to explain accident causation. Many layers of defense are set, it seems to be a swiss cheese. However, the inner layers of a swiss have holes. What if an imagine line can be form by connecting all holes, the
Why Second Officer usually assigned for long-haul flight?
March 16, 2024
點解SO 多數飛15個中或以上既機? First of all, what is long-haul, short haul? https://simpleflying.com/long-haul-flight-minimum-distance-guide/ https://avianet.ge/post/which-flights-are-considered-long-haul-flights Taking reference from aviation related websites, there is no consistent definition. However, I have tried to understand why CX need the SO for the so-called long hour flights – 仲要係 ‘Ultra Long Range Operations’ (ULR). The reasons is complying to CAD 371 –
CAD 54 – PILOT LICENCES AND ASSOCIATED RATINGS REQUIREMENTS DOCUMENT
March 16, 2024
https://www.cad.gov.hk/english/pdf/CAD54.pdf CAD has three part: Part One General Part Two Private Pilot’s Licences and Instructor Ratings Part Three Professional Pilot’s Licences CAD 54 actually is the syllabubs of the cadet program~ What I am expecting myself to achieve as a candidate ? What I am expecting to learn as a cadet pilot? CAD 54
Pilot Licences
March 16, 2024
HKCAD – Hong Kong Civil Aviation Department Pilot Licences https://www.cad.gov.hk/english/ppl.html We need to prepare our self to be competent as an airline crew with various requirements at different stage, although the CX application page concludes in 6 points briefly: A Hong Kong Permanent resident Graduated from secondary school with good passes in English language, Mathematics
點樣知機場QNH? 點樣知Local Pressure? How to know the QNH? How to know local pressure?
March 16, 2024
今日上完堂再唸左成個下午先好D 通左D, 所以一定要記底佢…小喇叭, 呢個Concept 好難明! Anyway, mark 低佢先! Reading (in feet) = (Set QNH – Actual pressure level) * 30 For example, if the aerodrome is 30 feet Elevation and 當時QNH是1013, then Reading (in feet) = (Set QNH – Actual pressure level) * 30 30 = ( 1013 – Actual pressure level )＊ 30 30/30
Why “Fly to low, watch below ; High to cold, watch below” ?
March 4, 2024
Ref Ace the technical pilot interview 2/E Ans: Always remember : aneroid barometer is working based on MSL pressure (i.e pressure height) ! 1. FL formula Flight Level (Pressure Height) in feet = Height @ QNH + (1013 – QNH) * 30 Example: Now say 300 feet @ 1025 PH = 300
Maximum Glide Range?
February 29, 2024
Ans : two manoeuvre factors – 1. optimal angle of attack 2. minimum drag speed 當上面兩樣野做到又吾計wind , 理論上隻機就會飛 @ max L/D ratio 記著： 重量同max glide range 無關！ 取決上面說的兩個操作factors – 大機同細機glide range 一樣 ！
Pilot math
February 29, 2024
計數係惡夢 但方法還是有 🤭 Ref skybrary: https://skybrary.aero/articles/rules-thumb 時間 Time 6 mins 0.1 hour 3 mins 0.05 hour 方位 Reciprocal Heading = HDG +200 – 20 or = HDG – 200 + 20 大過200就- 先 ； 細過200就+ 先 e.g 090 : 90 + 200 – 20 = 270 270 : 270 – 200 + 20
