What does the prop lever do?

By pulling the prop lever back, you adjust to prop to take a bigger ‘bite’ of air. What’s really happening is that you’re increasing the angle-of-attack of the propeller, and in turn, increasing the torque required of the engine to swing the prop around.

How does an Unfeathering accumulator work?

3) Unfeathering accumulators Found in many multi-engine training aircraft, the unfeathering accumulator stores oil under pressure when you move a propeller lever into the feather detent position. This helps the propeller start windmilling again, and helps the engine to restart.

What are the different systems found in aircraft?

This chapter covers the primary systems found on most aircraft. These include the engine, propeller, induction, ignition, as well as the fuel, lubrication, cooling, electrical, landing gear, and environmental control systems.

What was one of the major problems with using the steam engine to power an aircraft?

What was one of the major problems with using the steam engine to power an aircraft? The steam engine was very heavy and had low power output. Why did Samuel Langley choose to launch his flying machines over the water? Less damage to the flying machine if it crashed.

What does propeller RPM control do?

The throttle controls the engine power. In most engines (car, lawnmower etc.) this also controls the RPM. The prop control adjusts the pitch of the prop blades and thus the load on the engine, so the RPM stays the same (hence: “constant speed”) but it will fall off speed if there isn’t enough power.

How do you control a constant speed propeller?

Propeller (center)—Pull back and the blades increase in pitch, which lowers rpm. Push forward and they go flat, which increases rpm. In a multiengine airplane, if you pull the propeller control back all the way the blades will feather, or go horizontal, to reduce drag.

What are two other methods that are used to move a feathered propeller out of feather position if the plane does not have an Unfeathering pump?

There are four methods which may be used to accomplish unfeathering: developing oil pres- sure by rotating the engine with the engine starter; supplying oil pressure to the propeller from an accumulator; using an electric pump to supply oil pressure to the governor; and, directing oil from another engine propeller …

What is feathering system in aircraft?

A feathering propeller is a type of constant-speed propeller used on multi-engine aircraft. Usually, a propeller is feathered when the engine fails to produce the power needed to turn the propeller. By angling the propeller parallel to the direction of flight, the drag on the aircraft reduces.

How is engine operation controlled?

How is engine operation controlled on an engine equipped with a constant-speed propeller? The throttle controls power output as registered on the manifold pressure gauge and the propeller control regulates engine RPM.

How does the aircraft system work?

An aircraft engine, or powerplant, produces thrust to propel an aircraft. Reciprocating engines and turboprop engines work in combination with a propeller to produce thrust. All of these powerplants also drive the various systems that support the operation of an aircraft.

How does a steam engine work?

In a steam engine, hot steam, usually supplied by a boiler, expands under pressure, and part of the heat energy is converted into work. As the steam expands, it pushes the piston, which is usually connected to a crank on a flywheel to produce rotary motion.

What does engine powered airplane do?

Jet engines move the airplane forward with a great force that is produced by a tremendous thrust and causes the plane to fly very fast. All jet engines, which are also called gas turbines, work on the same principle. The engine sucks air in at the front with a fan. A compressor raises the pressure of the air.

How did aircraft speed increase during World War II?

It is noteworthy that with very few exceptions, almost all improvements in aircraft speed and load-carrying capability during World War II came from increased engine power and not from aerodynamic, structure, or system improvements in airframes. In turn, engine power increases came mainly from improvements in fuel and superchargers.

Why did World War II change the engine design?

Many of the engines which would see service in World War II started production in 1935. Engine design was driven by the push for altitude capability, where thinner air placed great emphasis on the supercharger. This push for power via increased supercharger pressure ratios and engine compression ratios also required improvements in fuel quality.

What engines were used in World War II?

Trainers and utility aircraft needed low power and high reliability, and received both air-cooled radial and inline engines. The ten engines produced in the greatest quantity were the following: Rolls-Royce/Packard Merlin/V-1650 – 165,000; Bavarian Motor Works 801 – 61,000. (The M-11 only powered trainers and utility aircraft.

Why did WWII planes have so many stages of supercharging?

This focused attention on small design details because of the resultant higher stresses and temperatures. Consequently, the engines used early in World War II often had up to two stages of supercharging, with the pilot able to select from two different supercharger impeller speeds.