Minimum and maximum speeds of the airplane in level flight condition at sea-level in m/s are
respectively
(A) 17.36 and 180 (B) 17.36 and 34.22
(C) 34.22 and 119.46 (D) 17.36 and 119.46
L L/2
A B q
2013 AEROSPACE ENGINEERING - AE
AE 16/19
Common Data for Questions 50 and 51: An aircraft is flying at Mach number M = 1.5, where the
ambient temperature is 250 K. The stagnation temperatur e of gases at the entry to the nozzle is 800 K. The
nozzle is choked and always under expanded. Assume the molecular weight of the exhaust gases to be 29,
the ratio of specific heats to be 1.4 and the universal gas constant is 8314 J/kmol-K.
Official Answer Key:
0.0
Step-by-Step Solution & Explanation
### **Official Solution & Step-by-Step Derivation (GATE AE 2013 Q.49)**
**1. Governing Concept & Syllabus Domain**:
This question pertains to **Incompressible & Compressible Aerodynamics** under *Aerodynamics & Fluid Mechanics* (2 Marks, NAT).
**2. Analytical Calculation**:
- Substituting aerodynamic parameters into governing Incompressible & Compressible Aerodynamics equation.
**3. Final Answer**:
Acceptable official numerical value is **0.0**.
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