What’s Feathering? (Propeller)
July 21, 2024
Ref untitled (cast-safety.org) 原文: “On a variable pitch propeller, the drag can be minimized by rotating the blades until they are edgewise to the flight direction. This is called feathering the propeller.” Why we need “feathering the propeller”? / When we need to “feathering the proeller”? When an engine is shutdown in flight, an
Why turbofan engine needs High bypass ratio? 點解要high bypass ratio?
June 1, 2024
Force = mass x acceleration [Ref Turbofan Engine | SKYbrary Aviation Safety] High bypass engines usually have a single stage fan which generates a high volume but relatively low speed air stream. The fan airflow, referred to as the cold air stream, is accelerated by the fan and passes through the engine remaining outside of
Why aircraft fly SO HIGH? 點解民航機要飛高D?
June 1, 2024
To answer this question, there are various approach. Weather Speed (Lift formular – air den v.s TAS) Efficiency of the engine Read More – Why Are Jet Engines More Efficient at Higher Altitudes? – HighSkyFlying
Carbon Fiber Composite (CFC) , Ceramic Matrix Composite (CMC)
May 27, 2024
CMC More about CMC: Behind the GE9X engine’s advanced technologies | Paid content | Flight Global CFC
Break Horsepower, Thrust Horsepower – BHP vs THP?
May 27, 2024
Definition of Horse Power (Break Horsepower) – refer below BBC youtube footage 5:14 Read more – Be caution ! 有出入 For below video, you may hear something a bit different, but the author mentioed that the clip below are on US basis.
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?
