The G-SONIC PRO range of propellers has its origins in the G-SONIC range of propellers. The proven blade design has been retained and the use of modern, high-strength plastic has led to increased torsional strength, flexural strength and tensile strength. Thanks to this, the GRAUPNER SONIC PRO series was even more efficient, because the propellers are able to generate more thrust at a reduced noise level. Graupner G-SONIC PRO propellers are designed and manufactured on the basis of the latest knowledge and using the latest CAD / CAM systems and machines. Thanks to this precise design and production method, the propellers achieve optimum performance and accuracy.