- #1
Eagle9
- 238
- 10
Imagine that the electro motor is rotating the blades in air at sea level:
During this rotation the air impedes the blades’ rotation and if the blades rotate too quickly or if they are made of fragile material they will be simply broken. Can anybody tell me how can we calculate if the rod (with some certain mass, length, volume and rotational speed) withstands air’s resistance or not? Material’s which property should be taken into consideration when calculating this? Specific strength or tensile strength? :shy:
During this rotation the air impedes the blades’ rotation and if the blades rotate too quickly or if they are made of fragile material they will be simply broken. Can anybody tell me how can we calculate if the rod (with some certain mass, length, volume and rotational speed) withstands air’s resistance or not? Material’s which property should be taken into consideration when calculating this? Specific strength or tensile strength? :shy: