Joby vs Archer - How quiet are they?
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- čas přidán 8. 05. 2024
- We went to see and hear for ourselves which EVTOL makes the least noise: Joby's S4 or Archer's Midnight? With camera and dB meter in hand we put them both to the test.
Send your feedback and observations to evtol.research@gmail.com
Thanks for the upload! Very interesting.
Thank you very much! This is a very telling video. Please post more. A couple of posters and myself have referenced this video and provided comments on the Yahoo Finance board for Joby.
This is starting to become pretty ridiculous and sad. Archer isn’t even close. I think the issue is that we all get triggered by Archer’s false hype and feel they are a threat to Joby. It’ll all get sorted out in the end once the S4 is awarded type certification and Joby commences commercial operations. It’ll then be very clear who was being genuine all along.
Impressive video for Joby, what altitude did the S4 reach 5k ft?
@sphudson could you clarify what leads you to believe “Archer isn’t even close”? The portions of the flights that are comparable in profile show quite similar levels, and the rest is completely apples-to-oranges.
@@livingroomguitarist7 don’t know in this video, but the S4 has flown as high as 10,000 feet or beyond.
@@SchrodingerPants Looking at three different times in the video in which the three different aircraft were hovering, I took a visual snapshot of the dB. Here’s what I come up with:
Joby March 26 - 72.2dB @40m (comparative baseline)
Maker April 16 - 55dB @240m (6x further away than Joby, but Joby is only 3.3x louder).
Midnight May 3 - 80.3dB @85m (2.125x further away than Joby, but is only 1.75x softer)
This audio confirms that both of them are just too loud at the meaningful time of take off and landing le. when close to ground houses and people plus the Duration of the noise is too great. Overflight noise when at 2000ft is almost meaningless and is of short duration - it would be nice to include a clip of glider winch launch where the aircraft creates NO noise or downwash turmoil even at Zero feet away , this is the solution to real urban/suburban air mobility and is called ATOL or assisted take off and landing and uses a simple cable array over the road requiring no expensive real estate or "vertiports" plus allows for truly seamless road to air and back travel ( and is much quicker than sluggish VTOL "hanging around" by climbing at 2000 feet per minute and getting underway immediately . A good contribution to exposing the fallacies in the evtol rush to oblivion. Having to go way away from where people live to avoid noise defeats the aim of UAM
Not even close to an even comparison between S4 and Maker. The camera crew is 40 meters away at S4's hover (71 db highest) while for Maker the crew is 240 meters away at hover (55 db highest). Even still. It's telling how loud Maker is to S4... Midnight is much louder with it getting to 85 db at 85 meters away.
They are going to mess things up for the rest of us. Check out my comments on the Yahoo finance community board for Joby. I really think these companies that do not focus on noise and acoustics are going to be an impediment to public acceptance of air taxis and various urban and suburban communities.
@@sphudson I am glad that these slapped together, 'not science project' eVTOLs sound obnoxious. It is very easy to tell the difference and sets Joby apart. In the case of Archer, I believe their schedule to begin service as much as I believed their schedule for delivery to the Air Force and for piloted flight! They have yet to transition and had one flight mishap this year, so far after which Midnight did not fly from March 7 to May 3 according to the observations in this video, contrary to their twitter posts.
Very much agree, @chrisn7847. These comments are a joke. @sphudson I’ll wait to see an equivalent comparison of these vehicles at useful GW and a takeoff profile that doesn’t drain the batteries before making such denouncements. You should too.
@mike33398109 We made a video about what happened between March 7 and May 3. You can find it here: www.youtube.com/watch?
v=WR8LrdCiz8E
If all of these are presumably flying without the weight of passengers, their noise will go up considerably when loaded as the disc loading of the propellers will increase.
On the May 3 flight, the aft propellers on the Midnight have four blades. It is especially visible at the very end of the video (16:20)
Looks like they need to up the power and speed on the aft motors if they want to get down to two blades. More noise coming. Wow, that is loud. I wonder what it is like in the cabin. I don't want one near my neighborhood! The midnight overhead is 99 - 100 dB with four blades on the aft props (15:20).
The Joby S4 is barely perceptible in comparison. Thank you very much!
It’s possible those rotors we’re actually rotating and the speed matched the frame rate of the video, making those rotors appear to be stopped. Regardless, it is very loud. They need to focus on noise and acoustics, not all the fancy CGI and renderings.
@@sphudsonThanks. Also look at time (11:52) when they are spooling up.
@@sphudson they need to focus on payload and distance. The sound of an empty craft isn't going to be the same as a fully loaded one.
The altitude difference of the vehicles during flyover differs by an order of magnitude. Making uninformed critiques of the performance based on this comparison is a waste of time.
@@SchrodingerPants The Joby takeoff is at 40 meters (0:43). The Archer takeoff is at 85 meters (11:50). That is a 6.5 db penalty for Joby! Have another look. The quality of Joby's db's are so, soo much better. Mostly sounds like wind or background noise, barely perceptible, not a swarm of angry hornets like Midnight.😂 Good luck.
I really like the Joby design. Loading them to max gross takeoff weight will certainly increase the noise, but still way less obtrusive than any helicopter. Now they just need to hybridize it and expand their utility/market 👍🏻
아처.. 데시벨 엄청 높네
Archer Aviation vs Joby Aviation - Which is a Better Investment?
czcams.com/video/NKkfO4J9er4/video.html
What about the sound with 1000lb load?
Do you mean even more intolerable? 😆
@@mike33398109 it would be louder. My toy drones are louder with heavier batteries than light ones.
Archer is too noisy to fly around buildings in city.