Chief Instructor Posted November 13, 2014 Share Posted November 13, 2014 Does anyone know what causes that characteristic 'chirping' sound you can hear externally with the rotors turning? It's very noticeable on all footage I've seen and is pleasingly present in this sim :thumbup: CPU: Intel i9 13900KS @5.8GHz | MB: ROG Strix Z790 Gaming-E | GPU: Asus ROG Strix RTX3090 OC | RAM: 32Gb Corsair Dominator DDR5 @6200MHz | Cooling: Custom CPU/GPU cooling loop | PSU: Supernova 850G2 @ 850W | OS: Windows 10 Home Premium 64Bit Storage: 3x Samsung EVO 970 Plus M.2 1Tb + 3x Samsung 850 EVO SSD 250Gb | Input: TM HOTAS WH Saitek Combat Pedals | Output: Samsung 50" OLED TV | VR: HP Reverb G2 | Audio: Realtek + Z906 5.1 Surround Sound Speaker System Link to comment Share on other sites More sharing options...
1.JaVA_Platypus Posted November 13, 2014 Share Posted November 13, 2014 Isn't it just the tip of the rotorblades going through the speed of sound while the rest of the blades are sub-sonic? Happy Flying! :pilotfly: Link to comment Share on other sites More sharing options...
AlphaOneSix Posted November 13, 2014 Share Posted November 13, 2014 (edited) It's the swashplate drive link. EDIT: Added a picture with the offending part circled in yellow. Edited November 13, 2014 by AlphaOneSix Link to comment Share on other sites More sharing options...
Chief Instructor Posted November 13, 2014 Author Share Posted November 13, 2014 Ah brilliant! Thanks for that AlphaOneSix. I can sleep now :-) CPU: Intel i9 13900KS @5.8GHz | MB: ROG Strix Z790 Gaming-E | GPU: Asus ROG Strix RTX3090 OC | RAM: 32Gb Corsair Dominator DDR5 @6200MHz | Cooling: Custom CPU/GPU cooling loop | PSU: Supernova 850G2 @ 850W | OS: Windows 10 Home Premium 64Bit Storage: 3x Samsung EVO 970 Plus M.2 1Tb + 3x Samsung 850 EVO SSD 250Gb | Input: TM HOTAS WH Saitek Combat Pedals | Output: Samsung 50" OLED TV | VR: HP Reverb G2 | Audio: Realtek + Z906 5.1 Surround Sound Speaker System Link to comment Share on other sites More sharing options...
Chief Instructor Posted November 14, 2014 Author Share Posted November 14, 2014 It's the swashplate drive link. EDIT: Added a picture with the offending part circled in yellow. Dare I ask why it makes that sound? The shaft speed is very low, so I can't imagine it being aerodynamic noise? CPU: Intel i9 13900KS @5.8GHz | MB: ROG Strix Z790 Gaming-E | GPU: Asus ROG Strix RTX3090 OC | RAM: 32Gb Corsair Dominator DDR5 @6200MHz | Cooling: Custom CPU/GPU cooling loop | PSU: Supernova 850G2 @ 850W | OS: Windows 10 Home Premium 64Bit Storage: 3x Samsung EVO 970 Plus M.2 1Tb + 3x Samsung 850 EVO SSD 250Gb | Input: TM HOTAS WH Saitek Combat Pedals | Output: Samsung 50" OLED TV | VR: HP Reverb G2 | Audio: Realtek + Z906 5.1 Surround Sound Speaker System Link to comment Share on other sites More sharing options...
Koekemoeroetoe Posted November 14, 2014 Share Posted November 14, 2014 Dare I ask why it makes that sound? The shaft speed is very low, so I can't imagine it being aerodynamic noise? I think you're underestimating how fast it turns. The surface 'hitting'the air is rather flat and I assume its not that aerodynamic. Try waving a ruler, even with the speed you can make with your hands it will already make some windy noise. Intel i9 10850k | Noctua NH-U12A | Gigabyte Z490 Aorus Elite AC | Patriot Viper Steel 64gb @3600MT/s | ASUS TUF RX 7900 XTX OC | Samsung 970 EVO 1TB NVMe | HP Reverb G2 Link to comment Share on other sites More sharing options...
Chief Instructor Posted November 14, 2014 Author Share Posted November 14, 2014 I think you're underestimating how fast it turns. The surface 'hitting'the air is rather flat and I assume its not that aerodynamic. Try waving a ruler, even with the speed you can make with your hands it will already make some windy noise. Yes, on reflection I'm pretty sure you're right! :thumbup: CPU: Intel i9 13900KS @5.8GHz | MB: ROG Strix Z790 Gaming-E | GPU: Asus ROG Strix RTX3090 OC | RAM: 32Gb Corsair Dominator DDR5 @6200MHz | Cooling: Custom CPU/GPU cooling loop | PSU: Supernova 850G2 @ 850W | OS: Windows 10 Home Premium 64Bit Storage: 3x Samsung EVO 970 Plus M.2 1Tb + 3x Samsung 850 EVO SSD 250Gb | Input: TM HOTAS WH Saitek Combat Pedals | Output: Samsung 50" OLED TV | VR: HP Reverb G2 | Audio: Realtek + Z906 5.1 Surround Sound Speaker System Link to comment Share on other sites More sharing options...
AlphaOneSix Posted November 14, 2014 Share Posted November 14, 2014 It's moving somewhere around 25mph (40km/hr) at the spot where the "whistle" is being generated. Link to comment Share on other sites More sharing options...
kilix Posted March 2, 2016 Share Posted March 2, 2016 sorry for necroing this thread, but this sound was bugging me, I could not sleep not knowing what causes it! :) Thank you AlphaOneSix, you made my day. This Mi-8 module is getting better every minute. I keep researching and I feel like I need to know all there is to know about this heli. My setup: Intel i3 4170, NVidia GTX960, 4x4GB DDR3 1600MHz, 128GB Kingston SSD, FaceTrackNOIR Modules: KA-50, Mig-21, SU-27, Mi-8 If the wings are traveling faster than the fuselage, it's probably a helicopter -- and therefore, unsafe Link to comment Share on other sites More sharing options...
Beta Sokol Posted March 2, 2016 Share Posted March 2, 2016 chirping sound Hello, want to hear real chirping sound - look for Mi 6 videos on YouTube... Have fun ! Link to comment Share on other sites More sharing options...
heli3 Posted February 26, 2020 Share Posted February 26, 2020 That is definetly not the swashplate scissor link. There is no way it can produce any aerodynamic sound turning that slow and being on the center of the rotor system, it doesn't beats the air and even less during a hover, when the sound is clearly heard I'm guessing the sound is produced by the tip of one of the five blades, perhaps because of some kind of tip light, tie down hole or some trim tab. YouTube Flickr Link to comment Share on other sites More sharing options...
AeriaGloria Posted February 26, 2020 Share Posted February 26, 2020 AlphaOnesix never said it was aerodynamic, the swashplate drive link has to rotate at that joint throughout every rotation, they probably just squeak real bad Black Shark Den Squadron Member: We are open to new recruits, click here to check us out or apply to join! https://blacksharkden.com Link to comment Share on other sites More sharing options...
AlphaOneSix Posted February 26, 2020 Share Posted February 26, 2020 (edited) It's aerodynamic, it moves plenty fast to make a whistle. I've never blown air over it to figure out exactly where the sound is generated, I just know it comes from the drive link. The drive link is greased fairly regularly and I've never heard them squeak from just moving. It is absolutely NOT the tip of one of the five blades. I think I've been working on and flying in these things long enough to have figured out where that whistle comes from. The first time someone hears it, they always think it's a blade tip, too. Edited February 26, 2020 by AlphaOneSix Link to comment Share on other sites More sharing options...
AeriaGloria Posted February 26, 2020 Share Posted February 26, 2020 Thanks much appreciated! Black Shark Den Squadron Member: We are open to new recruits, click here to check us out or apply to join! https://blacksharkden.com Link to comment Share on other sites More sharing options...
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