Silent rotorblades
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Silent rotorblades
Hello everyone,I'm new here and I'm not a pilot,but have been working for an AG pilot cropdusting.I was the truck driver until he crashed it a couple weeks ago.I would also like to ask you pilots some questions regarding when you should just not fly the helicopter because of mechanical issues.
Before that though,I came across these blades,are they going to become the norm. or just some engineers dream?
Most Viewed - Google Fast Flip
Video: A Silent Rotor Blade Paves the Way for Super-Stealth Choppers | Popular Science
Before that though,I came across these blades,are they going to become the norm. or just some engineers dream?
Most Viewed - Google Fast Flip
Video: A Silent Rotor Blade Paves the Way for Super-Stealth Choppers | Popular Science
Avoid imitations
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Welcome, Jim.
If they make the blades that quiet, in UK our governing body, the CAA, will make us fit bullhorns to warn the pedestrians!
If they make the blades that quiet, in UK our governing body, the CAA, will make us fit bullhorns to warn the pedestrians!
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Pretty impressive ,The first time I heard the EC145 fly in I was amazed how quiet it was. They will now need to put silencers on the engines as they will soon become the major source of noise.
John R81,
Knowing how EC(D) blades are made (a good trip if you can get one) I would doubt that there would be much loss of integrity at that end of the blade. The shaped tip may not even contain a void, as does the rest of the blade, and that may add momentum and stiffen it up greatly. Pure guesswork though!
Knowing how EC(D) blades are made (a good trip if you can get one) I would doubt that there would be much loss of integrity at that end of the blade. The shaped tip may not even contain a void, as does the rest of the blade, and that may add momentum and stiffen it up greatly. Pure guesswork though!
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I bet the price tag is worthy of cardiac arrest.
The original quiet helicopter.
Hughes Helicopters carried out a lot of work on their OH-6A/Hughes 500 many years ago to produce a quiet helicopter.
Air America's Black Helicopter | Military Aviation | Air & Space Magazine
Apparently, the noise reduction was as high as 20 decibels in certain phases of flight. The main blade tips were trapezoidal in shape and the four-blade tail rotor turned at a lower rpm. Those who worked on it swear that it was quieter than any of the quietest of today's helicopters. It must have been very quiet indeed.
Would the "Quiet One" fitted with a NOTAR system be even quieter, especially if the NOTAR fan blades were "shaped" to produce even less sound?
500 Fan.
Air America's Black Helicopter | Military Aviation | Air & Space Magazine
Apparently, the noise reduction was as high as 20 decibels in certain phases of flight. The main blade tips were trapezoidal in shape and the four-blade tail rotor turned at a lower rpm. Those who worked on it swear that it was quieter than any of the quietest of today's helicopters. It must have been very quiet indeed.
Would the "Quiet One" fitted with a NOTAR system be even quieter, especially if the NOTAR fan blades were "shaped" to produce even less sound?
500 Fan.
