Multi-Engine (Seminole) Flashcards
What is Vle for PA-44?
- 140 KIAS
- Do not operate the a/c above this speed with the landing gear extended
What is Vlo (down) for PA-44?
- 140 KIAS
- Do not exceed this airspeed when extending the landing gear (i.e. lowering the landing gear)
What is Vlo (up) for PA-44?
- 109 KIAS
- Do not exceed this speed if trying to raise the landing the gear
What is Vfe for PA-44?
- 111 KIAS
- Do not exceed this speed if extending flaps
- Top of the white arc
What is Vy and Vyse for PA-44?
- 88 KIAS
- Vy if the best rate of climb speed
- Vyse: Best rate of climb on a single engine
A low AoA pitch on a constant speed prop allows for:
- A higher RPM but less “bite” out of the air
- Less thrust
- Ideal for takeoff and climb setting (because we want more RPM during this phase of flight)
A high AoA pitch on a constant speed prop allows for:
- More thrust (more bite out of the air)
- Added drag will reduce RPM
- Ideal for cruise, where speed isn’t required
What is Vx and Vxse for PA-44?
- 82 KIAS
- Vx is the best AOC
- Vxse is the best AOC on a single engine
What is Vsse for PA-44?
- 82 KIAS
- Best safe speed to fail an engine
What is Vcc for PA-44?
- 105 KIAS
- Cruise climb speed
What is Vno for PA-44?
- 169 KIAS
- This is the maximum structural cruising speed (top of the green arc)
- Do not exceed this speed if in turbulent conditions
What is Vne for PA-44?
- 202 KIAS
- Never exceed speed (top of the red line)
What is the range of the white arc and what does it mean?
55 - 111 KIAS
This is the flaps operating range
What is Vmc for PA-44?
- 56 KIAS
- Minimum controllable airspeed on a single engine (bottom of the red line)
What are the engine driven power systems?
Electrical generating system
Pneumatic power systems
Hydraulic power systems
Describe the alternators in the new Seminoles 1995+:
- 2 engine belt driven alternators 14v 70 ampere
- Provides full electrical power, even at low power settings
Describe the alternators in the old model Seminoles 1979:
- 2 engine belt driven alternators 14v 60 amperes
- Provides full electrical power, even at low power settings
Which model (new or old) has cooling vent specifically for the alternator?
New models 1995+
What does a voltage regulator do?
Should overvoltage occur in either alternator, the voltage regulator will shut off the voltage of that alternator
What happens if one alternator is inop?
- The system is capable of running off one alternator if electrical load is reduced below 60 amps
- Low voltage will cause a “LO BUS” light to illuminate when the system drops below 12.5v DC
- If both alternators are inop, compass may show an error of up to 10 degrees
How do you check the engine suction in the seimiole?
- Normal suction range is 4.8 to 5.2”
- Look for the two red tabs in the suction gauge to indicate sufficient suction is provided
- A failed pump will be indicated by the red tab that has fallen back (not showing) into it’s hole
Engine failure on takeoff roll bold items before Vr:
- Throttle Idle
- Brakes Apply
go to checklist
Engine failure bold items on the roll no runway remains:
- Master switch OFF
- Fuel Selector OFF
- Mixtures IDLE CUTOFF