Robinson 44 POH Section 7 System Description (5/18/2024) Flashcards
General description of the R44
- Four place
- Single main rotor
- Equipped with skid-type landing gear
What is the primary fuselage structure?
Welded steel tubing and riveted aluminum sheet
What is the tailcone construction?
Monocoque structure in which aluminum skins carry most primary loads
The cabin door are constructed of what two types of materials?
- Fiberglass
- Thermoplastics
The coning and teeter hinges have what type of lubrication?
Self-lubricating
How are the main blades of the R44 constructed?
Thick stainless steel spar at the leading edge. Skins are bonded to the spar approximately one inch aft of the leading edge.
Describe the tail rotor
Two all-metal blades, a teetering hub with a fixed coning angle, asymetrical
How is the tail rotor constructed?
Aluminum skins and root fittings
Describe the engine (7 items)
- Lycoming
- IO-540 six cylinder
- Horizontally opposed
- Overhead valve
- Air cooled
- Fuel- injected
- Wet sump oil system
Describe the engine components (8 items)
- Starter
- Alternator
- Shielded ignition (provides a boundary around the ignition to absorb energy)
- Two magnetos
- Muffler
- Two oil coolers
- Oil filter
- Induction air filter
Describe the cooling system
- Direct-drive
- Squirrel-cage fan wheel
What happens if the engine compartment air filter or the intake become blocked?
A spring-loaded door in the air box automatically opens
Above 6000 feet, how should power changes be made?
Slow and smooth
The pedals actuate what type of controls?
Push-pull controls
Describe the hydraulic system (4 items)
- Pump
- Three servos
- Reservoir
- Interconnecting lines
What happens when you pull the HYD circuit breaker?
The hydraulics will not turn off, but the hydraulic switch becomes disabled
The fuel system includes the following components?
- Main and auxiliary tanks
- Shutoff valve
- A gascolator
- Engine driven pump
- Auxiliary pump
Do the fuel tanks have bladders?
YES
Describe the electrical system?
- 28 volt DC electrical system
- Alternator
- Sealed lead-acid battery
What continues to receive battery power, even if the battery switch is turned off? How is this made possible?
- Both tachometers and the clock.
- A wire protected by a fuse near the battery
Why shouldn’t you operate the alternator without the battery on?
Because the battery protects the electrical equipment from voltage spikes
Describe the lights on the R44
- 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)
Continuous operation of landing and position lights in flight is recommended why?
To promote collision avoidance
Engine tachometer signal is provided by what?
Magneto breaker points
Rotor tachometer signal is provided by what?
Two magnetic senders at the main gearbox drive yoke
