Turboprop feathering. For Reverse thrust there are unfortunately only two options currently in the sim - to bind a button PRESS/HOLD. Can someone tell my why many turboprops run in feather for a half minute or so before shutdown? What would happen if you didn't wait and shut it down right away. For a multi-engine propeller airplane a desirable feature is that the propeller with auto-feather when shutdown, so that an in-flight engine failure will cause the prop to be in a minimal drag configuration. It would seen to me that the props should be feathered for engine start, if for no other reason than noise reduction at the ramp. Functions of the condition lever can include any of the following: Fuel cut-off. A Condition Lever is a pilot actuated control which is located within the throttle quadrant of a turboprop engine equipped aircraft. When do you use feathering in an aircraft? Feathering is not engine starting, and also is not used in turbine (excluding turboprop) aircraft. Unfeather 7. Jul 29, 2016 · Autofeather is an automated feathering feature, common in a lot of turboprops, which automatically feathers the propeller on an engine if it loses power without having to either pull the power or propeller lever to feather the prop. Some pilots conduct the check just as they were taught in the Seneca or Travel Air or Duchess… GE T64 turboprop, with the propeller on the left, the gearbox with accessories in the middle, and the gas generator (turbine) on the right A turboprop is a gas turbine engine that drives an aircraft propeller. Also, the governor must be designed so that the constant-speed operation can be overidden at Jan 27, 2008 · Looking at the checklist for the KingAir 350, it indicates the props should be set to high rpm prior to engine start. Turbo Off 5. [1] A turboprop consists of an intake, reduction gearbox, compressor, combustor, turbine, and a propelling nozzle. The alert notes the importance of feathering at the right moment and why a gap in training can have deadly consequences. Feathering a propeller is stopping its rotation with the blades Dec 11, 2022 · In multiple-engined aircraft, it is very common to lose an engine to a fighter, and thus selecting the damaged engine with the engine select key and feathering its propeller is the best choice in order to reduce drag and maintain flight. Generator On SEQUENCE OF POWER CHANGES Sep 3, 2020 · Requesting to add feature similar in the picture below. When the power being produced by the engine drops to the point where it is not contributing to thrust, the propeller will go into a feathered mode to reduce drag. Fuel Valve-On 2. Autofeather is a feature of the engines on some turboprop and piston engine aircraft. (Figure 16-1) Turboprops are basically gas turbine engines that have a compressor, combustion chamber(s), turbine, and an exhaust nozzle (gas generator), all of which operate in the same manner as any other gas turbine engine. EDIT: We are calling it simulator but is it For blade feathering, the animation should be set up as follows: First Frame: This is the feather minimum, where the blade are parallel to the ground. Last Frame: This is the maximum angle of the blades. Note that the propeller lever Aug 16, 2022 · Feathering is where the blades are facing into the airstream to reduce windmilling and drag in the event of an engine failure… right? I’ve read you should also feather the prop on shutdown to stop it spinning sooner. Experts, on turboprop aircraft, is it harmful at all or highly taxing on turbo prop aircraft to use feathering as a speed break for descents? FEATHERING 1. In a piston or turbo prop aircraft, in the event of an engine failure, to decrease drag so you can either glide farther or have better performance on the remaining engine (s), you can set the prop pitch lever so instead of facing at a right angle to drive air backwards and produce thrust, the Aug 19, 2024 · Feathering the prop on the dead engine keeps it from ‘windmilling’ and adding the drag from both the prop and the engine compression. Throttle Cracked 5. Jet fuel Full-feathering / Turbo Prop Overhaul Like constant speed props, full-feathering propellers have blades which can be rotated to reduce drag. The turboprop propeller is operated by a gas turbine engine through a reduction-gear assembly. Most condition levers incorporate a fuel cut Aug 28, 2024 · The NTSB issued a safety alert this month on feathering your propeller when one engine loses power. When a turboprop engine fails, the propeller to which it’s connected will keep spinning. The pilot can manually control the feathering pump by either pressing a button, moving the control lever, or pulling the engine emergency shutdown handle, depending on the type of aircraft. With a straight shaft turboprop engine like a Garrett TPE331, this is not possible as feathering the props are controlled by the conditioning levers and also shut down the engines in the process. Mixture Auto-Rich 8. Jul 4, 2025 · What is Propeller Feathering Now imagine you're flying a turboprop aircraft and suddenly one of the engines stops working. Is there any other use for feathering? What do the engine metrics like NG, ITT, etc refer to? Sep 20, 2020 · Feathering the propeller puts the still spinning prop into a low-drag state (think palm down from the earlier experiment) which will make flying the airplane a bit easier with the loss of an engine. The advantages of a modern turboprop constant speed propeller are: better performance over a wider range of flight conditions, the ability to produce reverse thrust during landing rollout and ground handling, and the ability to minimize drag on the aircraft by feathering the propeller in the event of an engine shutdown. The propeller on that side doesn't stop spinning; instead, it continues turning in the wind, much like a windmill—hence the name windmilling, which creates a significant amount of drag, pulling the aircraft back and making it difficult to maintain a straight flight path Dec 14, 2014 · Feathering is not engine starting, and also is not used in turbine (excluding turboprop) aircraft. You will also need to setup the model behaviour XML to be able to automatically change the feathering amount based on inputs from the simulation. It has proved to be an extremely efficient power source. The feather plunger operates independent of the pilot valve. Especially for turboprops the feature is missing. [1] The auto feather system also allows pilots to reduce the drag of the propellers during an engine failure, therefore, allowing the plane to Sep 23, 2024 · Feathering is the process of aligning the blades of a failed turboprop engine so that they are aligned with the direction of the airflow. Warm up Engine 9. An additional function of some models of turboprop governors is to synchronize engine RPMs on multi-engine applications. Feather 3. Throttle Back 2. Commonly known The Turboprop (Turbopropeller) engine is a combination of a gas turbine engine, reduction gear box, and a propeller. To be able to feather, the propeller must have a great enough blade angle range to achieve an ap-proximate 90° blade angle. Redirecting Redirecting Dec 2, 2016 · Depends on they type of turboprop engine. Adjusting detents and reverse/beta range in-build control settings for generic throttle quadrants compatible with any aircraft. Fuel Valve Off UNFEATHERING 1. A free turbine turboprop would allow a person to feather the engines and then pull the power levers to the reverse position. So multiengine airplane propellers are featherable. Does anyone know what is done in the real world? Since then, the company has pioneered a number of new products, including constant speed and full-feathering propellers (both two- and three-blade). We would like to show you a description here but the site won’t allow us. It reduces crew workload in the event of an engine failure and, as a feathered propeller greatly reduces parasite drag on the side of the dead engine, reduces the Aug 16, 2022 · Feathering is where the blades are facing into the airstream to reduce windmilling and drag in the event of an engine failure… right? I’ve read you should also feather the prop on shutdown to stop it spinning sooner. May 1, 2020 · JARGON Feather When an airplane engine fails, the windmilling propeller creates significant drag. On a multi-engine aircraft, feathering the propeller of a failed engine results in both a reduction in drag and a reduction in adverse yaw vastly improving the engine-out handling characteristics and the engine-out flight performance of the aircraft. Mixture and Fuel Booster-Off 4. However, the diference is that the turbine in the Chapter IV Feathering Systems Propeller feathering systems are used on most multi-engine aircraft to reduce the drag created by a windmilling propeller if an engine should fail. The turbofan engine produces thrust directly; the turboprop engine produces thrust indirectly because the compressor and turbine Aircraft Feathering Pumps Some aircraft are equipped with a basic feathering system in which a feathering pump is used to adjust the propeller angle. [2] Air enters the intake and is compressed by the compressor. In 1979, a three-blade full-feathering and reversing turbo prop was certified, followed by a four-blade model in 1983. A windmilling prop vs feathered can make the difference between a shallow climb and a slow descent with the remaining engine at full power. The combination of propeller, reduction-gear assembly, and turbine engine is referred to as a turboprop powerplant. Prop Low RPM 4. Is there any other use for feathering? What do the engine metrics like NG, ITT, etc refer to? Oct 5, 2022 · When conducting the run-up propeller feathering check, have you noticed what happens to ITT? Of course, most of our attention is directed to the propeller tachometers, as it should be, making sure they decrease rapidly and significantly. Ignition Off 7. In a twin-engine airplane with the other engine producing plenty of thrust, that’s especially bad news—it can make the airplane difficult, or even impossible, to control. It is utilised to control some functions of both the propeller and the engine. Jul 21, 2024 · Autofeather is a technology that is designed to automatically feather the blades of a turboprop in the event of a failed engine. Ignition On 3. Generator Off 8. . Sep 2, 2015 · The picture of the turboprop is probably confusing you because you are looking at a shutdown engine. Prop Low RPM 6. Supercharger Off 6. These functions vary from installation to installation. The blades in full-feathering props can be turned to a high positive angle, which stops their rotation once the engine is shut down. yhv 8ojdvmp7 1vs phsz 68 gk7py8 rkhnt jips b8c8hu6d usqey