A rectangular wing of 1.2 m chord length and aspect ratio 5 is tested in a wind
tunnel at an air speed of 60 m/s. The density and the dynamic viscosity of air are
1.3 kg/m3 and 1.8×10-5 kg/m-s, respectively. A second rectangular wing of the
same span, but with an aspect ratio of 6, is to be tested in the same tunnel at the
same Reynolds number. The air speed at which the second test should be
performed is _______ m/s (answer in integer).
Official Answer Key:
0.0
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE AE 2025 Q.47)**
**1. Governing Concept & Syllabus Domain**:
This question pertains to **Structural Mechanics** under *Aerospace Structures* (2 Marks, 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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