Lecture 3 Flashcards
What are the primary function of the tail? [2]
trim and stability
Pros of Conventional Tail [2]
Base of vert and hori attached to fuselage
Vert tail v effective
lower induced drag
Pros of T tail [3]
Hori tail away from engine and wing air
Leaves rudder unblanketed at stall
style-ish
Cons of T tai [3]
Increased weight
asymmetric lift in yaw
deep stall occurs due to wind wake interfering with vert tail
How do you prevent deep stall [2]
device and something in elevator
Spring in elevator
Dorsal fin- merges hori tail to fuselage
When is cruciform tail best?
When engines are right by tail
Pros of V tail? [3]
Combines horizontal and vertical tail
Less tendency for rudder lock
Good during take off and landing
What is rudder lock
in sideslip, rudder could need to go the other way but the wind powerfully holding it in place
Cons of V tail? [2]
increased load
Advanced control needed
How does dorsal fin stop deep stall?
Reduces likelihood of vert stablisor to stall
How does a ventral fin help things? [2]
Improve stall angle and Dutch roll characteristics
Inverted V tail pro
Improved roll tendency
Inverted V tail cons
Annoying to build really tall landing gear
Y tail what is it
V tail plus bottom fin
Y tail advantages [2]
Improved directional stability
improved Dutch roll characteristics
