Start the engine
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 use battery to run the starter motor which provide initial force to the engine. Once the engine being started, it doesn’t need the ignition system anymore. 下面條片都幾清楚解釋由電池提供電力去推動starter motor.
https://youtu.be/xuGbxWDxX_M?si=MmQ34YW4WfdGEqdL
跟著…要真係解到點解starter motor 轉又可以令到Engine 轉…就要入到下一個深入D既階段同concept!
Boldmethod 有張好正既圖…通常用呢個方法startup既機都係General Aircraft which has reciprocating engine connecting to the propeller.
The starter motor which connect to the Impulse coupling, you can imagine it is a flywheel. When the starter motor turn, it turn the propeller and the magnetos since all these aircraft components are connecting together via mechanical device (crankshaft). Therefore, the magnetos turn, then it provide the first spark.
至於咩係Impulse coupling, 咩係crankshaft, 咩係magneto…睇下面D片繼續溫!
講開又講…如果吾用onboard battery…仲有無方法著機? 標準答案refer to the POH/AFM…當然我所知既可以駁地電或者EVEN 有樣野叫 hand prop
Big Jet with APU (say B777?)
https://youtu.be/bYjQ9fzinT8?si=ECBp-zCb6fwQbjfF
