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Not really.
There are helicopters the reduce noice significantly but all helicopters make some noise. largely due to their engines. This is esspecially the case if they are powered by turbine engines.
The blades that cut through the air also make some noise
There was a helicopter that was built during Vietnam that made very little noise due to extensive modifications. It was called the OH-6 "Loach."
It was used for special ops missions
see this link http://www.airspacemag.com/military-aviation/16047922.HTML
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∙ 12y ago
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What has the author J Steven Newman written?
J. Steven Newman has written: 'Helicopter noise contour development techniques and directivity analysis' -- subject(s): Helicopters, Noise 'The need for airport noise monitoring systems' -- subject(s): Airport noise, Airports, Noise control 'International Civil Aviation Organization Committee on Environmental Protection' -- subject(s): Helicopters, Noise, Measurement 'Helicopter noise definition report' -- subject(s): Helicopters, Noise 'Correlations of helicopter noise levels with physical and performance characteristics' -- subject(s): Helicopters, Noise, Handling characteristics
What has the author Roger C Strawn written?
Roger C. Strawn has written: 'New computational methods for the prediction and analysis of helicopter noise' -- subject(s): Computational fluid dynamics, Helicopters, Far fields, Noise prediction, Acoustic simulation, Aircraft noise, Blade-vortex interaction, Noise propagation 'Unstructured adaptive mesh computations of rotorcraft high-speed impulsive noise' -- subject(s): Helicopters, Noise
What has the author A M Carter written?
A. M Carter has written: 'A comprehensive bibliography of literature on helicopter noise technology' -- subject(s): Helicopters, Noise, Bibliography
Why do helicopters make noise?
The source of the noise made by Helicopters are created by several things. The engines can make noise just like any airplane. The transmissions can make a high frequency noise. The destinctive sound of helicopters is the "whop-whop-whop" it makes. This is caused by the rotor blades as it rotates.One reason for this sound is one blade passes and creates a vortex(or whirling tunnel of air) and then the next blade slaps this vortex.Another reason is that each blade must change pitch angle as it rotates around the central mast. When the blade is on one side of the helicopter, it has a high pitch and creates a high lift and therefore a large turbulent vortex. Then as it rotates to the other side of the helicopter, the blade must decrease its pitch angle, sometimes to almost zero angle. This rapid change in high blade angle and low angle causes this blade sounds.newtest3
What has the author Roger Strawn written?
Roger Strawn has written: 'Unstructured adaptive mesh computations of rotorcraft high-speed impulsive noise' -- subject(s): Helicopters, Noise
Do tamiya make helicopters or planes?
They make both.
What can helicopters do that make them unique?
Vertical take off and set down for one Helicopters can hover.
What has the author Danny R Hoad written?
Danny R. Hoad has written: 'Rotor performance characteristics from an aeroacoustic helicopter wind-tunnel test program' -- subject(s): Aerodynamic characteristics, Aerodynamics, Aircraft noise, Helicopters, Noise, Rotor aerodynamics, Rotor blades (Turbomachinery), Rotors (Helicopters), Wind tunnel tests
What has the author Clemans A Powell written?
Clemans A Powell has written: 'Effects of repetition rate and impulsiveness of simulated helicopter rotor noise on annoyance' -- subject(s): Helicopters, Noise, Rotors (Helicopters) 'Comparison of low-frequency noise levels of the Concorde supersonic transport with other commercial service airplanes' -- subject(s): Supersonic transport planes, Concorde (Jet transports), Jet plane sounds 'Laboratory study of annoyance to combined airplane and road-traffic noise' -- subject(s): Airplanes, Airport noise, Experiments, Noise, Psychological aspects, Psychological aspects of Airport noise, Psychological aspects of Traffic noise, Traffic noise 'Effects of road-traffic background noise on judgements of individual airplane noises' -- subject(s): Airplanes, Experiments, Noise, Psychological aspects, Psychological aspects of Noise, Testing, Traffic noise
How can you make small flying RC Helicopters?
You believe
How many helicopters did heinrich focke make?
2
How is cabin noise reduction in helicopters achieved?
Sound is reduced in helicopters by adding sound proofing to the interior of the cabin. The sound proofing on my CH-53E looks like big blue blankets although it has been removed for safety reasons.
