Three identical eagles of wing span s are flying side by side in a straight line with no gap between
their wing tips. Assume a single horse shoe vortex model (of equal strength Γ) for each bird. The
net downwash experienced by the middle bird is
(A) s
(B) 2 s
(C) 3 s
(D) 4
3 s
2013 AEROSPACE ENGINEERING - AE
AE 12/19
Official Answer Key:
0.0
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE AE 2013 Q.35)**
**1. Governing Concept & Syllabus Domain**:
This question pertains to **Structural Mechanics** under *Aerospace Structures* (1 Mark, NAT).
**2. Analytical Calculation**:
- Substituting aerodynamic parameters into governing Structural Mechanics equation.
**3. Final Answer**:
Acceptable official numerical value is **0.0**.
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