Robinson 44 POH Section 7 System Description (5/18/2024)

Question 1

General description of the R44

Answer 1

• Four place
• Single main rotor
• Equipped with skid-type landing gear

Question 2

What is the primary fuselage structure?

Answer 2

Welded steel tubing and riveted aluminum sheet

Question 3

What is the tailcone construction?

Answer 3

Monocoque structure in which aluminum skins carry most primary loads

Question 4

The cabin door are constructed of what two types of materials?

Answer 4

• Fiberglass
• Thermoplastics

Question 5

The coning and teeter hinges have what type of lubrication?

Answer 5

Self-lubricating

Question 6

How are the main blades of the R44 constructed?

Answer 6

Thick stainless steel spar at the leading edge. Skins are bonded to the spar approximately one inch aft of the leading edge.

Question 7

Describe the tail rotor

Answer 7

Two all-metal blades, a teetering hub with a fixed coning angle, asymetrical

Question 8

How is the tail rotor constructed?

Answer 8

Aluminum skins and root fittings

Question 9

Describe the engine (7 items)

Answer 9

• Lycoming
• IO-540 six cylinder
• Horizontally opposed
• Overhead valve
• Air cooled
• Fuel- injected
• Wet sump oil system

Question 10

Describe the engine components (8 items)

Answer 10

• Starter
• Alternator
• Shielded ignition (provides a boundary around the ignition to absorb energy)
• Two magnetos
• Muffler
• Two oil coolers
• Oil filter
• Induction air filter

Question 11

Describe the cooling system

Answer 11

• Direct-drive
• Squirrel-cage fan wheel

Question 12

What happens if the engine compartment air filter or the intake become blocked?

Answer 12

A spring-loaded door in the air box automatically opens

Question 13

Above 6000 feet, how should power changes be made?

Answer 13

Slow and smooth

Question 14

The pedals actuate what type of controls?

Answer 14

Push-pull controls

Question 15

Describe the hydraulic system (4 items)

Answer 15

• Pump
• Three servos
• Reservoir
• Interconnecting lines

Question 16

What happens when you pull the HYD circuit breaker?

Answer 16

The hydraulics will not turn off, but the hydraulic switch becomes disabled

Question 17

The fuel system includes the following components?

Answer 17

• Main and auxiliary tanks
• Shutoff valve
• A gascolator
• Engine driven pump
• Auxiliary pump

Question 18

Do the fuel tanks have bladders?

Answer 18

YES

Question 19

Describe the electrical system?

Answer 19

• 28 volt DC electrical system
• Alternator
• Sealed lead-acid battery

Question 20

What continues to receive battery power, even if the battery switch is turned off? How is this made possible?

Answer 20

• Both tachometers and the clock.
• A wire protected by a fuse near the battery

Question 21

Why shouldn’t you operate the alternator without the battery on?

Answer 21

Because the battery protects the electrical equipment from voltage spikes

Question 22

Describe the lights on the R44

Answer 22

• Red anti-collision light on tailcone (controlled by strobe switch)
• Position lights on either side of the fuselage and the tail (controlled by the nav lights switch)

Question 23

Continuous operation of landing and position lights in flight is recommended why?

Answer 23

To promote collision avoidance

Question 24

Engine tachometer signal is provided by what?

Answer 24

Magneto breaker points

Question 25

Rotor tachometer signal is provided by what?

Answer 25

Two magnetic senders at the main gearbox drive yoke