Reflection on Propulsion Demonstration - Yeo Eng Hai Jasper

We were instructed to wear the ear mask before the propulsion demonstration to prevent the loud noise generated by the engine hurting our ears. The expert ran the engine twice during the propulsion demonstration. According to what he said, the first run on the engine will always fail due to the temperature of the engine. This theory reminds me of the conventional oven we use in our kitchen. For example, before we bake or cook anything in the conventional oven, we would preheat the oven to a certain temperature, so that the baking or cooking process is more effective. When the engine was started at first run, a glow from the flame generated by the engine was seen prominently for a moment before the engine died. After the first run, I took a look at the instruments, and realized the temperature of the engine was significantly increased. On the second run, the sound generated by the engine increased gradually. From the sound, I could assume that the engine was running faster and faster. The revolutions-per-minute of the engine keeps on increasing, according to the value on the instruments.

In the engine, air is compressed after being drawn in from the air intake. The compressed air and the fuel will be ignited in the compression chamber, resulting in a stream of hot gases driving the turbine.