Midterm Mod 1-6

Question 1

what are three main airframe components

Answer 1

forward fuselage
intermediate fuselage
Tailboom/tailcone

Question 2

what is a tail skid used for

Answer 2

preventing damage to the tail/vertical stab in the event of a ground strike

Question 3

what purpose does the tail guard serve

Answer 3

a visual indicator to prevent individuals from walking into a spinning tail rotor

Question 4

what is a firewall? where are they located?

Answer 4

prevents fire from spreading to crew compartments. located fore and aft of engine bay

Question 5

what are dynamic components

Answer 5

components that move during flight

Question 6

what components make up the main rotor assembly

Answer 6

main rotor
mast
pitch links
swashplate
main rotor gearbox

Question 7

what is the difference between stations, waterlines and buttlines

Answer 7

stations run longitudinally
waterlines run vertically
buttline run horizontally from the center outwards

Question 8

what is the difference between a tailcone and a tailboom

Answer 8

same component, different names
tailboom by bell
tailcone by Robinson

Question 9

where on a robinson’s tail rotor are you allowed to handle

Answer 9

gearbox and inboard side of the horizontal stab

Question 10

what are the four types of blade movement

Answer 10

feather
teeter
lead/lag
flap

Question 11

what are three main types of rotor heads

Answer 11

rigid
semi rigid
fully articulated

Question 12

what movement does a semi-rigid rotor head allow

Answer 12

teeter

feather

Question 13

what movement does a rigid rotor head allow

Answer 13

feather

Question 14

what movement does a fully articulated rotor head allow

Answer 14

feather
flap
lead/lag

Question 15

what is the difference between a fully articulated rotor head and a soft-in-plane rotor head

Answer 15

fully articulated uses bearings and hinges to allow movements

soft-in-plane rotor head uses flexing of the head structure to allow movements

Question 16

what is a droop stop

Answer 16

stops rotor blades from flexing too far downwards while stationary

Question 17

what is a teeter stop? what are the different types?

Answer 17

stops the rotor head from teetering too far and striking the mast

dynamic and static teeter stops

Question 18

what is the difference between a static and dynamic teeter stop

Answer 18

static - stays in one place constantly

dynamic - moves out of the way during flight due to centrifugal forces.