(C) 0.22 and 8300 km (D) 0.22 and 1900 km
An aircraft in level flight encounters a vertical gust, which excites the phugoid mode. The phugoid
motion completes 10 cycles in 50 s and its amplitude reduces to half of its maximum value in 25 s.
The eigenvalues of the phugoid mode are
Official Answer Key:
0.0
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE AE 2011 Q.42)**
**1. Governing Concept & Syllabus Domain**:
This question pertains to **Linear Algebra & Differential Equations** under *Engineering Mathematics* (2 Marks, NAT).
**2. Analytical Calculation**:
- Substituting aerodynamic parameters into governing Linear Algebra & Differential Equations equation.
**3. Final Answer**:
Acceptable official numerical value is **0.0**.
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