About this 3D model

it is a test in this moment!!! here is more... http://www.rcgroups.com/forums/showthread.php?t=1793759&page=50 One direction http://youtu.be/7s-33_NB5xg Different direction http://youtu.be/y2CFjvmC4Uo Two versions, tube bow in one direction, and tube bow in different direction...