Does a helicopter have an exhaust?
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Does a helicopter have an exhaust?
Two sets of exhaust tailpipes composed of lobed nozzle and mixing tailpipes are embedded inside the rear airframe of the helicopter as seen in Fig. 2. The exhaust gas firstly flows into the lobed nozzle then flows out to the mixing tailpipe that follows the lobed nozzle and exits from the slot of tailpipe.
Do helicopters have mufflers?
You assume that they do not have mufflers or sound dampeners for their engines. When, in fact, they do. Helicopter engines are just like the engines of any other aircraft. Piston-engined helicopters have mufflers just like piston engined airplanes and cars.
What are the main parts of a helicopter?
The major components of a helicopter are the airframe, fuselage, landing gear, powerplant, transmission, main rotor system, and tail rotor system.
What is helicopter fan called?
A helicopter main rotor or rotor system is the combination of several rotary wings (rotor blades) and a control system that generates the aerodynamic lift force that supports the weight of the helicopter, and the thrust that counteracts aerodynamic drag in forward flight.
What starts a helicopter engine?
The gas turbine engine mounted on most helicopters is made up of a compressor, combustion chamber, turbine, and gearbox assembly. The compressor compresses the air, which is then fed into the combustion chamber where atomized fuel is injected into it. The fuel/air mixture is ignited and allowed to expand.
How do helicopters fly silent?
The noise comes from the engines, the main rotor blades and the tail rotor blades. The engines can be located on top of the helicopter and perhaps provided with extra plates that deflect noise toward the sky. The tail rotor, being small, can be completely enclosed in a fairing that eliminates most of its noise.
Is there a silent helicopter?
Stealth helicopters are helicopters that incorporate stealth technology to decrease an enemy’s detection ability. However, blade designs have been developed that can significantly reduce noise, which has traditionally been a major issue for any operation involving the clandestine use of helicopters.
What makes a helicopter fly?
In order to fly, an object must have “lift,” a force moving it upward. A helicopter’s rotor blades are wings and create lift. An airplane must fly fast to move enough air over its wings to provide lift. A helicopter moves air over its rotor by spinning its blades.
Is flying helicopter hard?
Learning to fly a helicopter is difficult, but becomes easier with practice. It requires hand and feet coordination, looking where to go, talking to air traffic control, and planning ahead. The average student takes between 50 – 80 hours and costs between $15,000 – $25,000.
How do helicopters rotate?
Unlike airplanes, helicopters feature spinning wings called blades or rotors on top. As a helicopter’s blades spin, they create a force called lift that allows the helicopter to rise into the air. The rear rotor can face different directions, allowing the helicopter to move forward, backward, and sideways.
Can a helicopter fly without a tail rotor?
One significant advancement in the last decade has been the no-tail rotor, or NOTAR, helicopter. As you now know, vertical-lift flight is impossible without a tail rotor to counteract the torque produced by the main rotor. Unfortunately, the much-smaller tail rotor makes a lot of noise and is often easily damaged.