Update README.md

Author: kathyz95

Classroom Challenge Projects/Projects/Drone Payload Capacity and Structural Design Analysis/README.md

@@ -10,7 +10,7 @@ As drone use becomes increasingly common, such as in aerial photography, infrast
 ## Project Description
 This project challenges students to apply core principles from physics and engineering, such as force balance, material properties, and structural analysis, to the real-world problem of designing a quadcopter drone capable of maximizing payload capacity. 
 
-First, you will propose at least two drone arm designs. Using the provided material properties, the weight of other drone components, and a minimum payload requirement, you will use MATLAB to perform thrust-to-weight analysis across your designs to ensure safety margins and maximize payload capacity. You will then create a 3D model of one design using a CAD software of your choice, import it into MATLAB, and perform finite element analysis to evaluate deformation and stress under motor thrust and component weight, conducting a parameter sweep of material properties to identify the material that provides the highest structural integrity. As an optional extension, you will also minimize the total material cost of your design by incoporating the average cost of each material option.
+First, you will propose at least two drone arm designs. Using the provided material properties, the weight of other drone components, and a minimum payload requirement, you will use MATLAB to perform thrust-to-weight analysis across your designs to ensure safety margins and maximize payload capacity. You will then create 3D models of your designs using a CAD software of your choice, import it into MATLAB, and perform finite element analysis to evaluate deformation and stress under motor thrust and component weight, conducting a parameter sweep of material properties to identify the material that provides the highest structural integrity. As an optional extension, you will also minimize the total material cost of your design by incoporating the average cost of each material option.
 
 Through this process, students explore authentic engineering tradeoffs, such as balancing weight, strength, and efficiency, to arrive at a design solution.