This paper presents the monitoring of resin flow during resin infusion process in the fabrication of glass fiber reinforced polymer GRP wind turbine blade (WTB). The reinforcement of the composite was an E-glass fiber and epoxy type of resin was used as the matrix. The fabrication of composite WTB by resin infusion was conducted with the introduction of 'moldless' setup, where both upper and lower skins are covered by flexible mould/vacuum bag without any rigid female mould. A wooden core is used and acts as an "inner" mould to obtain the wind turbine shape. The manipulation of resin insertion i.e. two infusion strategies were designed as such that their travel length are varied. The whole infusion process was monitored and the flow front pattern was traced at certain time intervals to investigate the infused percentage area over time. Percentage of area infused over time was compared with the analytical plot based on Darcy's law. A good agreement was found between the experimental observation and the theoretical plot even with presumption of few constants parameters (viscosity, permeability, pressure gradient, etc.). © (2013) Trans Tech Publications, Switzerland.