12
TECH GENERAL — CHAPTER 12
Aircraft Stability
DGCA Syllabus — What to Know
Longitudinal stability: static/dynamic, neutral point, CG limits, CM-α graph, elevator-speed graph, stick force per g, phugoid, short period, bob weight, down spring, Mach trim. Directional stability: CN-β graph, dorsal fin, strakes. Lateral stability: CL-β graph, dihedral/anhedral, wing location. Dynamic lateral: Dutch roll, yaw damper, spiral dive, effects of altitude.
Topics in this Chapter
Longitudinal stability
static/dynamicneutral pointCG limitsCM-α graphelevator-speed graphstick force per gphugoidshort periodbob weightdown springMach trim
Directional stability
CN-β graphdorsal finstrakes
Lateral stability
CL-β graphdihedral/anhedralwing location
Dynamic lateral
Dutch rollyaw damperspiral diveeffects of altitude
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Detailed Notes Being Prepared
Full chapter notes with diagrams, mnemonics, and exam-focused explanations are being written by Capt. Pankaj Pahil.