Schedule 0 10:00 AM - 12:00 PM [E-P4-07] Experimental Comparison of Multiple Blades in Propeller Efficiency (C000172) *Hiroki Kai1, Koju HIRAKI1, Reuben Jikeme Umunna1 (1. Kyushu institute of technology Univ.) Keywords:space, efficiency, Mach, Mars explorer, Propeller performance