What Do You Know About Robinson R44 Helicopter? Trivia Quiz

The purpose of the teletemps found on the R44 is to provide an indication of an increase in operating temperatures. This is important as it allows the pilot or operator to monitor the temperature levels of the aircraft during operation. By having this indication, they can take necessary actions to prevent any potential overheating or damage to the aircraft systems.

The statement is true because a yoke flange and flex coupling are indeed found behind the main rotor gearbox on the tail rotor drive shaft. These components are important for transmitting power from the main rotor gearbox to the tail rotor, allowing for the control of the helicopter's yaw.

The minimum oil quantity for takeoff is 7 quarts. This is the amount of oil required to ensure proper lubrication and cooling of the engine during the takeoff phase. Having at least 7 quarts of oil ensures that the engine will have enough oil to operate smoothly and efficiently during the critical moments of takeoff.

On start-up, the throttle must be fully closed. This is because when the engine is initially started, it requires a rich fuel mixture to ignite and run smoothly. By closing the throttle, it restricts the amount of air entering the engine, allowing for a higher concentration of fuel to be delivered. This ensures that the engine receives the necessary fuel for a successful start and prevents any potential flooding or stalling of the engine.

The correct answer is "No action necessary; the clutch motor is adjusting the tension of the belts and the flight should be continued." This means that if the CLUTCH light comes on for 5 seconds and then goes out, there is no need to take any action. The light indicates that the clutch motor is adjusting the tension of the belts, which is a normal process during flight. Therefore, the flight can be continued without any concerns or additional steps.

The correct answer is 7-9 Quarts because this range ensures that there is enough oil for the flight. Having a minimum of 7 quarts guarantees that there is an adequate amount of oil, while having a maximum of 9 quarts prevents overfilling and potential issues caused by excessive oil. This range provides a safe and optimal oil quantity for the flight.

The main rotor blades of the R44 turn counterclockwise when viewed from above.

The maximum KIAS (Knots Indicated Airspeed) that may be flown is 100 KIAS. The question mentions that the right back door has been removed for a sightseeing flight, but this information is irrelevant to determining the maximum KIAS. Instead, the relevant factors are the pressure altitude (4000') and the temperature (20 degrees C). Without any further information or limitations provided, the maximum KIAS is 100.

If the rotor brake is engaged, the helicopter will not allow you to engage the starter motor because it is designed to prevent the engine from starting while the rotor brake is engaged. This is done to avoid any potential damage to the engine or other components.

The R44 helicopter has three fuel drains. Fuel drains are used to remove any water or contaminants that may have accumulated in the fuel system. Having multiple fuel drains allows for more thorough inspection and maintenance of the fuel system to ensure its proper functioning and safety.

The R44 helicopter has two static ports. Static ports are small openings on the aircraft's surface that allow for the measurement of static pressure. These measurements are crucial for the accurate functioning of various instruments on board, such as the altimeter and airspeed indicator. Having two static ports helps ensure redundancy and accuracy in the readings taken by these instruments.

The correct answer is "Free-wheeling unit." A sprag clutch is a type of clutch that allows rotational movement in one direction while preventing it in the opposite direction. It is commonly used in automotive applications, such as in the transmission system, to allow the vehicle to coast or freewheel when the engine is decelerating or idling. Therefore, "Free-wheeling unit" is an appropriate alternative name for the sprag clutch.

Flying at 50' AGL and 60 KIAS provides a sufficient altitude and airspeed for autorotation in the event of an engine failure. Autorotation is a technique used by helicopter pilots to safely land the aircraft without engine power. It involves using the upward flow of air through the rotor system to maintain rotor RPM and control the descent rate. The given altitude and airspeed would allow the pilot to initiate autorotation and safely land the helicopter in case of an engine failure. Therefore, the statement is true.

If the CLUTCH light comes on and does not go out within 10 seconds, the correct action to take is to pull the CLUTCH circuit breaker and land as soon as practical. This is because the CLUTCH light indicates a potential issue with the clutch system, and continuing the flight without addressing the problem could lead to further complications or failure. Pulling the circuit breaker and landing allows for a thorough inspection and necessary repairs to be made.

The correct answer is Minimum: 90%, Maximum: 108%. This means that the minimum rotor speed limit is set at 90% and the maximum rotor speed limit is set at 108%. These limits determine the range within which the rotor can operate safely and efficiently. Going below the minimum speed limit can cause the rotor to stall, while exceeding the maximum speed limit can cause mechanical stress and damage to the rotor. Therefore, it is important to stay within these specified limits to ensure proper functioning of the rotor.

The question asks whether it is a requirement to remove the controls from the right seat when air taxiing to the refueling bay from the left seat. The answer states that neither option is correct, suggesting that it is not a requirement to remove the controls from the right seat in this scenario.

If the LOW FUEL warning light illuminates, you can expect the engine to run out of fuel within 10 minutes at cruise power setting. This means that if the aircraft continues to fly at the current power setting, it will have enough fuel for approximately 10 more minutes before it completely runs out.

If the amber STARTER ON light remains illuminated after start, it indicates that the starter motor is still engaged even though the engine has already started. This can lead to potential damage to the starter motor if it is not addressed. Therefore, the correct action to take is to pull the mixture off and then switch off the battery. Additionally, it is recommended to have the starter motor serviced to prevent any further issues.

The normal autorotating speed for the Robinson R44 is 70 KIAS. Autorotation is a maneuver performed in helicopters where the engine is disengaged and the rotor blades are allowed to rotate freely. During autorotation, maintaining a specific speed is crucial for a controlled descent and landing. In the case of the Robinson R44, the normal autorotating speed is 70 KIAS, which stands for Knots Indicated Airspeed.

The correct answer is to first turn off the master battery switch and then the alternator switch, followed by landing immediately, extinguishing the fire, and inspecting for damage. This sequence of actions is important in order to cut off the electrical power supply, which can help prevent further fueling of the fire. Landing immediately is crucial to ensure the safety of the aircraft and its occupants. Extinguishing the fire and inspecting for damage are necessary steps to assess the situation and address any potential hazards.

The meaning of the abbreviation 'TOGW' is the take off gross weight including payload and required fuel onboard. This refers to the total weight of the aircraft at the moment of takeoff, including the weight of passengers, cargo, and the fuel needed for the flight.

The maximum allowable gross weight for the Robinson R44 Raven II helicopter is 2,500 lbs.

The maximum speed for an autorotation in a Robinson R44 is 100 KIAS. Autorotation is a maneuver performed by helicopter pilots in the event of an engine failure, where the rotor blades are allowed to spin freely without power. During an autorotation, the helicopter descends vertically and the pilot uses the collective and cyclic controls to control the rate of descent and the direction of the helicopter. The maximum speed of 100 KIAS ensures that the helicopter remains within safe operating limits during this maneuver.

The overall length of the Robinson R44 from blade tip to the end of the rotating tail rotor is 11.66m.

The recommended takeoff and climb as well as approach for landing speeds is 60 KIAS.

When autorotating for distance, the correct speeds and RRPM values are 90 KIAS (Knots Indicated Airspeed) and RRPM (Rotor Revolution Per Minute) at 90%. This means that the helicopter should maintain an airspeed of 90 knots and the rotor should be spinning at 90% of its maximum revolutions per minute. This combination of speed and rotor RPM allows for efficient autorotation, which is a technique used to safely land a helicopter in the event of an engine failure.

For a minimum rate of descent (endurance), the aircraft needs to maintain the slowest airspeed possible while keeping the rotor revolutions per minute (RRPM) at a high enough level for stability. The correct answer of 55 KIAS and 90% RRPM satisfies these requirements by providing a slow airspeed and a high enough rotor speed to maintain stability during descent.

The Robinson R44 Raven II is equipped with a Lycoming IO-540 engine. The question asks for the five-minute take-off rating in BHP of this engine. The correct answer is 245 BHP.

The maximum operating altitude of the Robinson R44 Raven II to allow landing with 5 minutes in case of a fire is 9,000' AGL (Above Ground Level). This means that the helicopter can fly up to 9,000 feet above the ground and still have enough time to descend and land within 5 minutes in case of a fire. This altitude is specifically mentioned to ensure the safety of the occupants and allow for a timely response to any emergency situation.

At an altitude of 4,000' and a temperature of 30 degrees C, the maximum take-off power for the Robinson R44 Raven II is 24.8.

The maximum airspeed to use power above MCP is 100 KIAS. MCP stands for Maximum Continuous Power, which is the maximum power that can be used at any airspeed. Therefore, when operating above MCP, the maximum airspeed to use is 100 KIAS.

The correct answer is 28V. The voltage of the Robinson R44 Raven II helicopter electrical system is 28V.

Before a flight, the alternator must be operational to ensure a continuous supply of electrical power to the aircraft systems. The RPM governor is also necessary to regulate the engine speed and maintain a stable rotor RPM. The low rotor RPM warning system is essential for detecting any decrease in rotor speed, which could be dangerous during flight. The OAT gauge, which measures outside air temperature, is important for monitoring the environmental conditions during the flight. Lastly, the hydraulic control system is crucial for controlling various aircraft systems, such as the landing gear, brakes, and flight controls.

The maximum weight allowed for any seat is 136 kg, which includes any weight in the baggage compartment under the seat.

The correct answer is 108 kts. The VNE (Velocity Never Exceed) is the maximum speed at which an aircraft is allowed to fly. It is determined by factors such as the aircraft's weight, altitude, and temperature. In this case, the question specifies a pressure altitude of 6000' and a temperature of 30 degrees C, and asks for the VNE for a Robinson R44 Raven II with a takeoff gross weight of 2150lbs. The correct answer of 108 kts is the maximum speed limit for this specific scenario.

To determine the maximum Takeoff Gross Weight (TOGW) for hovering Out of Ground Effect (OGE) at 5,500 feet pressure altitude and 30°C, we’ll follow the guidelines for helicopter performance calculations. Let’s break it down:

Hover OGE (Out of Ground Effect): This scenario involves hovering without the benefit of ground effect. We need to find the maximum weight the helicopter can handle under these conditions.

Bell 407 Example:

Takeoff Power: 100%

Pressure Altitude: 6000 feet

Outside Air Temperature (OAT): +20°C

Wind: Calm

Heater and Anti-ice: Off

Maximum Gross Weight for OGE Hover:

Refer to the table of Hover Ceiling OGE.

Enter the OAT scale at +30°C.

Move upward to the 6000 feet HP curve.

Move horizontally to the +30°C curve.

Drop down to read the maximum external gross weight of 4700 pounds.

Therefore, for hovering OGE at 5,500 feet PA and 30°C, the maximum allowable Takeoff Gross Weight (TOGW) is 4700 pounds. Keep in mind that this weight considers the density altitude and temperature conditions, ensuring safe helicopter performance during takeoff and hover.

The LOW Fuel warning light illuminates when there is approximately 3 USG (usable) of fuel remaining. This means that when the fuel level reaches this point, the warning light will come on to indicate that the fuel is running low and the driver should refuel soon.

The maximum operating altitude of the Robinson R44 Raven II is 14,000' density altitude. Density altitude is the pressure altitude corrected for non-standard temperature and humidity, and it is a more accurate measure of an aircraft's performance capabilities at higher altitudes. Therefore, the R44 Raven II can operate at a maximum altitude of 14,000' when considering the effects of temperature and humidity on its performance.

The maximum usable capacity for the main tank of the Robinson R44 Raven II is 112 litres, while the maximum usable capacity for the auxiliary tank is 64 litres.

To hover IGE (In Ground Effect) at a higher altitude and temperature, the helicopter requires more power due to the decrease in air density. The maximum Takeoff Gross Weight (TOGW) is the highest weight at which the helicopter can hover IGE under these conditions. Among the given options, 2,500 lbs is the highest weight mentioned, indicating that it is the maximum TOGW for hovering IGE at 5,500' PA and 30 degrees C.

The Robinson R44 helicopter has a maximum gross weight of 2,400 lbs, encompassing the total weight of the aircraft, passengers, fuel, and cargo. This weight limit ensures safe flight operations and optimal performance. Exceeding this weight can compromise the helicopter's handling, stability, and safety. Therefore, adhering to this limit is crucial for safe and efficient flight operations.

The maximum KIAS (Knots Indicated Airspeed) is determined by the aircraft's performance and environmental factors. In this scenario, the given information includes the altitude, temperature, weight, and manifold pressure. These factors affect the aircraft's engine performance and density altitude. As the altitude and temperature increase, the density altitude also increases, resulting in a decrease in engine performance. Additionally, the weight of the aircraft affects its ability to maintain speed. Considering these factors, the maximum KIAS in this scenario is determined to be 108 KIAS.

When the alternator and mastery battery switches are turned off, the low RPM warning system and governor become inoperative. The low RPM warning system is dependent on the electrical power provided by the alternator, so when it is turned off, the system cannot function properly. The governor, which regulates the engine speed, also requires electrical power from the alternator to operate. Therefore, when the alternator and mastery battery switches are off, both the low RPM warning system and governor are unable to function.