Dillman Gouge

Question 1

What are the 12 Vmc Items

Answer 1

critical engine inop
critical engine windmilling
sea level
max takeoff power
landing gear retracted
flaps in T.O. position
cowl in T.O. position
trim for T.O position
most rearward CG
max gross weight
sea level
no more than 5 bank toward op engine

Question 2

definition of Vmc

Answer 2

minimum flight speed at which the airplane is directionally controllable with one engine inoperative

Question 3

What is a critical engine

Answer 3

the engine whose failure most adversely affects the aircraft, i.e. the one with the shortest moment arm thus requiring less resisting force to maintain directional control

Question 4

Which of our engines is our critical engine

Answer 4

we do not have one because of our counter rotating props

Question 5

what is zero side slip

Answer 5

a small amount of bank and slightly uncoordinated flight to align the fuselage with the direction of travel and minimize drag

Question 6

what is our zero side slip

Answer 6

half a ball
2-3 degrees

Question 7

Which cylinders does the priming solenoid prime?

Answer 7

1,2, and 4

Question 8

Why do we not prime cylinder 3

Answer 8

it is used to gauge cylinder head temperature

Question 9

Engine system

Answer 9

2 180HP @ 2700 RPM direct drive horizontally opposed air cooled 4 cylinder engine

Question 10

Propeller and its properties

Answer 10

propellers are connected directly to the crankshaft of the engine.
oil sends the propeller high rpm low pitch
no oil/ nitrogen gas sends the propeller low rpm high pitch unfeathering accumulator - helps unfeather our engine with nitrogen gas and oil

Question 11

What is the difference between VMC and VS on the diagram and what does that mean to us as pilots

Question 12

Vmc item maximum takeoff power

Answer 12

Vmc will increase with max takeoff power - lots of differential thrust
opposite - vmc decreases - differential thrust will be reduced

Question 13

Vmc item inoperative engine windmilling

Answer 13

Vmc will increase with propeller windimilling - lots of drag created on one engine lots of thrust on the other = differential thrust
opposite - less drag created means less differential thrust which lowers vmc

Question 14

Vmc item critical engine inoperative

Answer 14

Vmc will increase - one engine inoperative means that one wing creating lots of thrust and other wing creating none = lots differential thrust
opposite - both engines less turning forces less differential thrust

Question 15

Vmc item at sea level

Answer 15

at sea level Vmc increases - denser the atmosphere better engine runs = more differential thrust
opposite - less dense atmosphere = engine not run as good = less differential thrust

Question 16

VMC item gear up

Answer 16

Vmc increases with gear up - flat offers nothing for wing to move around = provides no directional control opposite- lowers Vmc because keel effect - allows more directional stability by the gear hanging down

Question 17

Vmc item flaps in T.O position

Answer 17

NA - flaps move together and other than adding drag do not help or hurt us in with our differential thrust - effects vertical lift not horizontal

Question 18

Vmc item Cowl Flap in T.O. position

Answer 18

NA - cowl flaps move together and do not add additional drag or lift and consequently do not effect thrust or weight. they do not change our differential thrust and do not effect our horizontal lift

Question 19

Vmc item trim for takeoff

Answer 19

NA - trim effects our vertical component of lift not our horizontal component of lift. meaning that it will not help or effect our aircraft in Vmc

Question 20

Vmc item CG most adverse condition (aft)

Answer 20

Vmc will increase - rearward CG will cause little arm and less effective rudder control - meaning it takes more rudder for the same control, meaning a higher speed will be our Vmc
Opposite - more forward arm will be more effective rudder lowering Vmc

Question 21

Vmc item max takeoff weight

Answer 21

lowers with more weight - inertia will keep your plane from rolling and yawing because it is harder to displace more weight
opposite - lower weight means it is easier to be displaced (roll/yaw)

Question 22

Vmc item up to 5 degree of bank into op engine

Answer 22

decreases with the correct bank - creates horizontal lift by using ailerons. Ailerons take part off the rudder which makes the rudder have more authority
opposite - not banked correctly adds 3 knots for every degree not banked correctly because you are taking away from your horizontal component of lift