Reconstruction of the transport of the moai statues and pukao hats

Everyone who sees the moai statues on Easter Island is surprised that these giants were transported across the island by primitive aborigines. There are some problems in effecting transport: the first is their weight. Next is the fact that each statue was transported in one piece. The aborigines finished them in the area of the quarry and after that each was moved to its position on an ahu platform. There are many theories about this mystery of Easter Island. I tried to find a solution with the help of my experience as an engineer. Therefore some of my ideas and claims may not exactly match the archaeological point of view.