What’s Monsoon Wind ; Why Monsoon blow from north east in winter and southwest in summer?
Ref: https://www.hko.gov.hk/en/publica/gen_pub/files/sms_Urdu.pdf https://www.hko.gov.hk/en/education/weather/meteorology-basics/00010-geostrophic-wind.html https://www.hko.gov.hk/en/education/weather/monsoons/00068-why-the-winter-monsoon-in-hong-kong-is-generally-called-the-northeast-monsoon.html 所謂季候風就係會隨著季節改變既風, 但光是研究呢個季候風既風向都搞左我粒幾鐘, 因為背後講緊既CONCEPT 有好幾個: 咩叫High pressure system, 咩叫Low pressure system 咩係風 咩叫Coriolis effect (科里奧利力/科科氏力) 咩叫Geostrophic Wind (地轉風) 想簡單D咁理解就要背少少野 (明白少少基本CONCEPT) High, Low pressure system 是相對 (relative) : compare one air mass with another one 仲要記得通常凍就係有高壓區, 熱就係有低壓區~ 風就是due to two air mass has pressure difference and so the pressure gradient as
Pilot sharing : Decision making
This evening, I deeply thanks that a pilot shared with us by using scenario and group work. Let me briefly type what I have learnt this evening ~ CLEAR model Clarify the issue or question – ident problem Look for options Evaluate the options – factors including safety, legality, pax comfort, OTP and Cost. Action
2024-2025 I will, I am going to achieve it!
齊腳, Fly beyond! 2024-2025 I will, I am going to achieve it! 2024-2025 We will, We are going to achieve it!
ETOPS ? EDTO?
https://www.flightglobal.com/cathay-etops-okay/10579.article The timestamp of this article disclosed that CX A330 has already obtained ETOPS 120 in 1996. https://simpleflying.com/etops-banned-areas/ This article gave us some background information about ETOPS, and told us one of the reasons why B747 was popular in 1980s: Before 1985, all twin aircraft had to remain within 60 minutes of a suitable diversion airport. This
Any formula to proof that local speed of sound decrease with altitude increases?
Reference: POE – AI Yes, there are formulas that can help explain why the local speed of sound decreases with higher altitude. The speed of sound is determined by the properties of the medium through which it travels, such as temperature, pressure, and density. One important formula is the adiabatic equation of state for an
What’s coffin corner?
Reference：https://airwaysmag.com/coffin-corner-aviation/ , https://www.boldmethod.com/learn-to-fly/aerodynamics/coffin-corner-where-vne-and-mmo-meet/ Ans: Coffin Corner can be explained by using below illustration. It is talking about when when the aircraft fly to an altitude where the aircraft reduces the speed, it will stall while the aircraft increase its speed, it will over the Mmo. Therefore, the margin for error is low.The coffin corner is
What’s CAVOK , What’s NCD, NSC
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”
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
