Analysis of information sources in references of the Wikipedia article "أجهزة طرف الجناح" in Arabic language version.
{{استشهاد بمجلة}}: صيانة الاستشهاد: أسماء متعددة: قائمة المؤلفين (link)Aerodynamic improvements include a reduced diameter and decreased tip speeds. This results in quieter operation and reduced tip vortices. The 90° bend reduces the vortices that, on traditional blades, pick up debris that can contact the blades and cause nicks, gouges and scratches.
To counteract this, the EH101's 'winged-tip' rotor blades create what its pilots call the "donut effect" – a circular window of clear air inside the dust storm that allows them to see the ground as they come in to land.
{{استشهاد بمجلة}}: صيانة الاستشهاد: أسماء متعددة: قائمة المؤلفين (link)Aerodynamic improvements include a reduced diameter and decreased tip speeds. This results in quieter operation and reduced tip vortices. The 90° bend reduces the vortices that, on traditional blades, pick up debris that can contact the blades and cause nicks, gouges and scratches.
To counteract this, the EH101's 'winged-tip' rotor blades create what its pilots call the "donut effect" – a circular window of clear air inside the dust storm that allows them to see the ground as they come in to land.