A nation's transport system is one of the many aspects that affect its economic growth. One mode of transportation that is frequently used by society at large is the train. With advancement. Because technology is developing so quickly, humans are needed to carry out new inventions. More contemporary, the innovation being created frequently is the application of composite materials made of raw natural fibres. One of the uses of coconut fiber is as a composite material used as a coating for the train carbody. This study will test composite materials on coconut fiber using a polyester resin matrix with a random fiber arrangement using the hand lay-up method and mesh variations of coconut fiber 50, 100, 150, and 200 at volume fraction 40%. In the tensile, the mesh variation had the highest tensile strength in 100 mesh variatons, with results 28.52 N/mm2.