Abstract

The characteristics of the Engine Lycoming 360 igniter in Cessna Aircraft Type 172 which serves to sprinkle sparks for combustion in the combustion chamber. This study to know about characteristics of sparkplug. Testing of the Chemical Composition of the Lycoming 360 Engine igniter shows that iron (Fe) is 74.5% and chromium (Cr) is 23.6% are the dominant elements, therefore including Fe-Cr alloy elements. The results of the Vickers hardness test is 182.27 VHN. The correlation between the two tests is the Fe-Cr Alloy has Vickers Hardness of 182.63 VHN, this value is obtained from the number of iron percentage 74.5% and 23.6% chromium. Chromium (Cr) is an element that can increase the hardness of carbon steel and increase corrosion-resistance. The result of Scanning Electron Microscopy that Fe is dark colour and Cr is bright colour. Therefore the hardness of the Lycoming 360 Engine igniter is high due to the addition of several elements that help the properties of the main element. The Cessna 172 spark plug on the Lycoming 360 Engine has chemical composition of 74,5%Fe-23,6%Cr and a hardness of 182 VHN but spark plug in Daihatsu Ayla has chemical composition of 94,35% Fe-0,99% Carbon is called high carbon steel and a hardness of 468 VHN. The novelty in this research is spark plug on the Lycoming 360 Engine more corrosion resistance than spark plug in Daihatsu Ayla.

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