Systems

Question 1

Engine details

Answer 1

two lycoming, 4 cylinder, O-360 engines rated at 180hp at 2700rpm. right engine is LO because it rotates to the left.
theyre direct drive, horizontally opposed, piston driven, carbureted and normally aspirated.
ignition provided through engine driven magnetos.

Question 2

when is carburetor icing a concern?

Answer 2

certain moist atmospheric conditions at temps of 20 to 70 degreed F.

Question 3

Why is it possible for ice to form in the induction system even during summer weather?

Answer 3

because of the high air velocity through the carburetor venturi and the absorption of heat from this air by vaporization of the fuel.

Question 4

propeller details

Answer 4

aircraft is equipped with hartzell two bladed, controllable pitch, constant speed, full feathering metal propellers.

Question 5

explain the use of centrifugal stop pins in the seminole.

Answer 5

it is equipped with centrifugal stop pins that keep the propeller from feathering below 950rpm. this is to prevent there from being excessive loads placed on the starter mechanism.

Question 6

landing gear details

Answer 6

hydrraulically actuated, fully retractable, tricycle type landing gear. hydraulic pressure for gear operation is provided by an electrically powered, reversible hydraulic pump.
gear is held in up position solely by hydraulic pressure.
when the gear goes down, downlock hooks engage and a spring maintains force on the hooks until released by applying hydraulic pressure with the gear selector

Question 7

when is the gear warning system activated?

Answer 7

1. the gear is not locked down with the MP below 15”
2. the gear is not locked down with wing flaps selected to 25 or 40
3. the gear handle is up while on the ground

Question 8

flaps and stall warning

Answer 8

manual flap system which extended to 10, 25, and 40. spring loaded to return to zero
the stall warning is electric tabs (2). the outboard detects stalls at flaps 0 and 10 while the inboard detects at stall 25 and 40

Question 9

vacuum pump

Answer 9

there are two engine driven vacuum pumps. normal operating range is 4.8 to 5.2 inches of mercury. suction is used by the attitude indicator. one pump can handle the whole system.

Question 10

what do you need to do when you pull the alternate static?

Answer 10

the storm window and cabin vents must be closed, and the heater and defroster must be turned on. this will reduce the pressure differential between the cockpit and the atmosphere.

Question 11

fuel capacity

Answer 11

there are two 55 gallon tanks for a total of 110, 108 of which is usable.

Question 12

electrical system

Answer 12

14 volt system, with two 70 amp alt and a 12 volt 35 amp per hour battery. one alternator can power the system. there are over voltage relays on each alt which will take it offline if it produces for than 17 volts.