What is the purpose of the engine on an airplane?
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. Turbojet and turbofan engines produce thrust by increasing the velocity of air flowing through the engine.
What is the basic purpose of adjusting fuel air mixture at altitude?
In order to maintain optimum engine performance, the fuel/air mixture must be monitored and adjusted while in flight. As you climb to higher altitudes, the fuel/air mixture must be leaned to decrease the fuel flow in order to keep the fuel/air mixture constant and compensate for the decreased air density.
What is the purpose of dual ignition?
Dual ignition promotes engine efficiency by initiating twin flame fronts, giving faster and more complete burning and thereby increasing power.
How does a dual ignition coil work?
Dual fire ignition systems fire both spark plugs from a single coil at the same time. The majority of the spark energy goes to the cylinder under compression while a small portion goes to the cylinder on the exhaust stroke causing a small wasted spark. The main advantage of dual fire systems is simplicity and low cost.
What are the three main functions of oil in an airplane?
Engine oil flows through an engine, lubricating every part. The three major functions that lubricants perform are: reducing friction, cooling, and cleaning. Specialised additives help an engine maintain its performance, too.
What is one purpose for using reciprocating engines?
A – Adjust for proper RPM and check for desired indications on the engine gauges. What is one purpose for using reciprocating engines? B – To preserve cylinder head duration and maintain lower temperatures.
What is pressure altitude used for?
Pressure altitude is primarily used in aircraft-performance calculations and in high-altitude flight (i.e., above the transition altitude).
Why are there two magnetos?
Why are there two Aircraft Magnetos? The dual arrangement of aircraft magnetos produces a smoother and more complete combustion of the fuel mixture. It also provides for ignition redundancy, so that the engine will continue to run in the event that one magneto malfunctions.
What is a dual ignition system on an airplane?
Modern airplane engines are required by to have a dual ignition system – that is, two separate magnetos to supply the electric current to the two spark plugs contained in each cylinder. One magneto system supplies the current to one set of plugs; the second magneto system supplies the current to the other set of plugs.
What does dual ignition mean on a Jabiru engine?
Dual ignition. A Jabiru 5100 flat-8 four-stroke aircraft engine with dual ignition, with two spark plugs per cylinder and two distributors. Dual Ignition is a system for spark-ignition engines, whereby critical ignition components, such as spark plugs and magnetos, are duplicated.
What causes a misfire on a dual ignition system?
If the TEL doesn’t completely vaporize in the combustion cycle of your engine, which can happen if your engine is running too cool, lead deposits can accumulate on your spark plugs, causing them to mis-fire. That’s where the dual ignition comes into play again.
Why do aircraft engines have two spark plugs per cylinder?
First off, reliability plays a major role as to why your aircraft’s engine has two spark plugs per cylinder. Picture this: you’re flying along in cruise, and your magneto fails. If you had a single ignition system with only one spark plug per cylinder, your engine would stop running.
https://www.youtube.com/watch?v=n2GvlrKaHNE