Gasoline engines are increasingly popular for use in small unmanned aircraft\nrequiring endurance due to the specific energy of gasoline (47.3 MJÃ?·kgâË?â??1) and\nits cost effectiveness. However, gasoline is volatile and it poses a health hazard.\nIn this work, isopropanol is proposed and investigated as viable fuel for\nsmall gasoline engines. Isooctane is used as a benchmark for performance\ncomparison. The field testing reveals that isopropanol offers similar running\nperformance and ease of starting. The maximum output power of isopropanol\nis surprisingly found to occur at a more advanced ignition timing compared\nwith isooctane. The significant outcome of this study is that isopropanol can\nreadily be used as a replacement fuel for existing engines without the need for\nany modifications to the ignition module or the engine itself.
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