Start the engine
August 3, 2025
好…家下又溫下aicraft 既engine…到底飛機Engine 點著嫁呢? 呢個問題可以再細分為startup procedure and the working principle of the engine…當然細機同大機有不同原理! 由於每隻機 (吾同Model)都有少少分別…溫下theory~ 小型飛機 Ref : https://www.boldmethod.com/learn-to-fly/systems/how-does-a-plane-start/ ; https://www.faa.gov/sites/faa.gov/files/09_phak_ch7.pdf 小型飛機通常有一個Starting System (Ignition system) 去start the engine. It consists of the battery, ignition switch, and a starter motor. Of course, you may say the electrical circuit (lines and switch) is important. In general, we
Hand Propping
August 3, 2025
Ref: https://www.faa.gov/sites/faa.gov/files/regulations_policies/handbooks_manuals/aviation/airplane_handbook/03_afh_ch2.pdf Hand Propping General aviation aircraft can be hand-propped (manually started) due to a few key reasons: some aircraft are older and lack electric starters, others may have battery issues, and it’s also a method to check for potential hydraulic lock in the engine, according to aviation publications. While electric starters are common, hand-propping remains a
Skid and Slip (on rolling)
August 3, 2025
通常講skid and slip, 我地都好易聯想起在turn 既時候uncoordinated turn 果個 skid and slip…但實際在rolling 既時候都可能有skid and slip…今日又做下溫習~ 我地知道skid and slip係有分別…但點解家下普通airliner 配備既係”anti-skid system” 而不是”anti-slip system”? 呢個問題係幾有趣…首先…我地要從學揸車開始! Understeer (推頭) = Slip Oversteer (甩尾) = Skid Ball-out Skid Ball-in Slip 之後就要睇下下面呢條片2:39 當braking force 增加到某個程度就會引致Skid (而在飛機進入Skid 之前一定會有一斷slip既時間…但Slip 反而有助stopping the aircraft!) https://youtu.be/TQrBwJWzmAc?si=2as89SBGnTdyz0X7 要睇下家下D飛機既設計! https://youtu.be/vZmS661zijo?si=KGdV4sVmJrRthnP2 https://youtu.be/F3uqUDGKsZQ?si=DH8Zuk60jZdJsyQe Btw…turning after airborne 果個skid and
溫故知新之飛機BRAKE!
August 3, 2025
過去好似收集過吾同Brake 有關既post…不過好似有D亂…今日一早就睇下吾同”交通工具/載具”既Brake! Private Car: Disc Brake by normal spring mechanism! Bus and Truck : Drum / Disc brake power by compressed air! General Aircraft : disc brake powered by Hydraulic (but only a master cylinder)! B777, A350 : Carbon Fibre Brakes (disc brake) powered by Hydraulic! B787, A220 : electrically activated braking system – electro-mechanical
巴士貨車同一般私家車既剎車原理吾太一樣: 巴士貨車用 Air Brakes! How’s Air Brake Works?
August 3, 2025
How Air Brakes Work in Trucks https://youtu.be/fbT_MFZLP9s?si=bYdXVGqumvyWzEqB https://youtu.be/twuO2tsuNKo?si=x-O9COMQhN_N5L5n https://youtu.be/dMxilatT0qw?si=Li_H8RB38PvDah_w
