Cloud Base v.s Cloud Ceiling
May 25, 2024
A cloud base refers to the lowest visible part of the clouds over the station. A cloud ceiling refers to the distance between the ground or water and the base of the lowest layer of clouds, which must form a cloud cover that blankets more than half of the sky below 20,000 feet. Read More –
Temperature Inversion 逆溫層
May 25, 2024
Key notes: ISA condition: Temperature falls at a rate of 2 °C per 1,000 feet until the tropopause (@ISA condition) Temperature inversion : occurs when the temperature of the air rises with altitude Temperature inversion affects ACFT performance 經常搞錯或會有誤會既concept: Temperature inversion layers are commonly shallow layers of smooth, stable air close to the ground
What’s Sea Breeze and Land Breeze?
May 25, 2024
NWS JetStream – The Sea Breeze (weather.gov) Sea breeze and Land breeze are kind of convective current Day time 地球吸熱是greenhouse effect Night time 地球放熱是radiation cooling The sea breeze circulation is composed of two opposing flows; one at the surface (called the sea breeze) and one aloft (which is a return flow). These two
Sunrise, Sunset and Rainbow, Northern lights (aurora borealis)
May 25, 2024
Why sunsets organge? Ans: Scattering effect! How are rainbows formed? – Met Office How Are Rainbows Formed? | Royal Meteorological Society (rmets.org) Northern lights – Met Office
Aircraft Tyre : basic things you need to know!
May 24, 2024
How to change aircraft tyres? What type of gas are used for modern jetliners? Why aircraft’s tyres have no groove, but have straight profiles?
What’s Microbust?
May 23, 2024
Read more – Turbulence v.s Wind Shear – Tommy’s Diaries (tommykwan.com)
What’s Solar insolation?
May 22, 2024
The weather on our mother earth is starting from the energy of the sun. So, how the energy of sun can reach the earth? To more specific, weather is basically the result of temperature differences! Another useful footage for us to learn about the basic background of temperature difference on the earth Read more –
What’s ITCZ?
May 22, 2024
https://skybrary.aero/articles/inter-tropical-convergence-zone-itcz https://www.noaa.gov/jetstream/tropical/convergence-zone https://www.metoffice.gov.uk/blog/2025/what-are-convergence-zones https://www.bbc.co.uk/bitesize/guides/z9yssbk/revision/1
Protected: 10 hours of flight experience
May 21, 2024
There is no excerpt because this is a protected post.
What’s Trough of Low 「低壓槽」？
May 21, 2024
Ref https://www.hko.gov.hk/en/education/weather/wind-and-pressure/00117-introduction-to-air-pressure-part-ii.html A trough of low pressure is an extended area of low pressure. On the weather chart, it has associated with it a trough line. The pressure there is lower than that at neighbouring points on either side of the trough line. Monsoon low pressure v.s Tropical cyclone
Landing gear – how modern jetliner landing gear work?
May 20, 2024
“Oleo Pneumatic Shock Absorber Strut” – it is used on modern jetliner landing gear (e.g B777, A350). Read More – Thx Captain Joe! Gravity Extension of landing gear Why is the landing gear tilted? What’s Nose wheel steering?
