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-   -   Conventional vs Beam Wiper Blades aerodynamic? (https://ecomodder.com/forum/showthread.php/conventional-vs-beam-wiper-blades-aerodynamic-41396.html)

airbiteses 05-08-2024 12:12 AM

Conventional vs Beam Wiper Blades aerodynamic?
 
Which wipers have less air resistance while driving? flat or skeleton? Because one car had skeleton wipers at the factory and it is possible to have flat or hybrid ones.

Piotrsko 05-08-2024 05:31 AM

Because they are messing with boundary layer flow, it isn't just one design over the other. Could also be down in the data noise area also and would be difficult to see much change

Phase 05-08-2024 05:37 PM

Most wipers are in the low pressure zone behind the air intake where the hood and windshield meat do they don’t have any affect on the aero. I even removed my wipers. Made no difference in testing

freebeard 05-08-2024 07:00 PM

More economy to be had by long-lived blades in operation?

j-c-c 05-11-2024 08:33 PM

I think most missed the point, the aero wipers offered main attribute is to add contact pressure at speed enhancing their effectiveness in redirecting water off the windshield. Other purchaser misconceptions about positives are likely left to stand unaddressed by the manufacturers as good marketing for the g/dullible. The Aero positive effect of whatever it is, is also likely only during a very limited amount of the wipers arc in use.

j-c-c 05-11-2024 08:38 PM

Quote:

Originally Posted by Phase (Post 693223)
Most wipers are in the low pressure zone behind the air intake where the hood and windshield meat do they don’t have any affect on the aero. I even removed my wipers. Made no difference in testing

Actually, I believe it is thought to be a high pressure, low velocity zone?

freebeard 05-12-2024 02:12 AM

Depends on the vehicle architecture. Lamborghini Countach/Cypertruck have no discernable cowl. The Cybertruck stores the wiper longitudinally.

aerohead 05-13-2024 01:17 PM

' speed '
 
Quote:

Originally Posted by j-c-c (Post 693255)
I think most missed the point, the aero wipers offered main attribute is to add contact pressure at speed enhancing their effectiveness in redirecting water off the windshield. Other purchaser misconceptions about positives are likely left to stand unaddressed by the manufacturers as good marketing for the g/dullible. The Aero positive effect of whatever it is, is also likely only during a very limited amount of the wipers arc in use.

Years back, ROAD & TRACK wrote that in a road test of one of the Lamborghinis, that before they hit the 205-mph top speed, the wipers had already completely lifted off of the windshield, straining against their preload tensioning springs.
And in the 1970s, Porsche added inverted, cambered 'wing' deflectors to their wipers, presumably to address the same issue.

j-c-c 05-13-2024 02:25 PM

That problem is of little concern to me, as I tend to stay under 200mph in the rain , and seldom take my Lambo out in it.

Seriously, we should be looking to aircraft wipers for inspiration on this topic.

aerohead 05-13-2024 02:32 PM

' aircraft '
 
Quote:

Originally Posted by j-c-c (Post 693275)
That problem is of little concern to me, as I tend to stay under 200mph in the rain , and seldom take my Lambo out in it.

Seriously, we should be looking to aircraft wipers for inspiration on this topic.

Tesla got the folks who built the wipers for the Space Shuttle to design the Cybertruck's unit.:)

j-c-c 05-13-2024 05:15 PM

The ultimate anti teardrop sub 100mph Cybertruck has wipers designed by Shuttle engineers?

That makes sense to me.:rolleyes:

freebeard 05-13-2024 06:23 PM

Tesla hiring engineers that work from first principles. That makes sense to me. :cool:

Sub-100?

Quote:

https://www.motortrend.com › news › tesla-cybertruck-electric-pickup-fast-0-60-range-payload-towing
How Fast is the Tesla Cybertruck? And How Much Can It Tow? - MotorTrend
The Tesla Cybertruck has three different powertrains with top speeds of 110, 120, and 130 mph. The top speed depends on the number of motors and the battery size, as well as the towing and range capabilities.

https://www.caranddriver.com › news › a60125624 › 2024-tesla-cybertruck-beast-quickest-truck-acceleration-test
Tesla Cybertruck Is the Quickest Truck Car and Driver Has Tested
Mar 8, 2024The Tesla also has the quickest top speed of the group by at least 20 mph. That sustained level of performance allowed the Cybertruck to clock a quarter-mile time of 11.0 seconds at 119 mph.
I think it's a low-poly teardrop. For fabricability's sake, tumblehome is substituted for curvature. It uses longitudinal vortexes to move air around the peak.

j-c-c 05-13-2024 06:35 PM

Using a Shuttle engineer(s) that has nearly relatively zero concern for drag and with an airframe that seldom if ever operates below 200mph for mere seconds on flare with extreme UV, temperature and massive sonic pressures to design wipers for a ground-based trophy truck with likely little aero concerns sounds like a fool's errand to me, beyond slick marketing hype, all principles aside.

I'll stick with Tiger while they figure out the design of the Tesla wipers

freebeard 05-13-2024 09:45 PM

I'll stick with RainX.

Meanwhile, they're working on this:

https://cdn.motor1.com/images/custom...ow-cleaner.jpg
insideevs.com/news/457030/tesla-patented-innovations-future-cars/

freebeard 05-13-2024 10:22 PM

Coincidentally, the next things I watched:

TEARING APART my Tesla Cybertruck made my mechanic want to RETIRE!!! And we found something BROKEN?

That wiper is limp as a noodle for half it's length, but the windshield washer is more trouble. And the exterior might be bullet proof, but the snap-on cover for the cabin filter is not.

aerohead 05-16-2024 10:58 AM

' anti teardrop '
 
Quote:

Originally Posted by j-c-c (Post 693280)
The ultimate anti teardrop sub 100mph Cybertruck has wipers designed by Shuttle engineers?

That makes sense to me.:rolleyes:

1) From my perspective, the Cybertruck silhouette represents the 'MOST' teardrop-like form of all production pickup trucks.
Simply park one over a shallow reflecting pool, and observe the 'mirror image'.
2) The Cybertruck's wiper wasn't designed by Shuttle engineers, they were designed by 'THE' Shuttle engineers who designed the wipers for the Space Shuttle.
3) Driving the Cybertruck 'Beast', at 85-mph on the toll-road between Austin and San Antonio, into the gust front headwinds we can expect, starting at 11:00 A.M. today, will place the wiper in a 145-mph airspeed environment.

aerohead 05-16-2024 11:04 AM

' zero concern '
 
Quote:

Originally Posted by j-c-c (Post 693283)
Using a Shuttle engineer(s) that has nearly relatively zero concern for drag and with an airframe that seldom if ever operates below 200mph for mere seconds on flare with extreme UV, temperature and massive sonic pressures to design wipers for a ground-based trophy truck with likely little aero concerns sounds like a fool's errand to me, beyond slick marketing hype, all principles aside.

I'll stick with Tiger while they figure out the design of the Tesla wipers

Rob Palin and Franz Von Holzhausen weren't given much to work with.
Personally, I'm very impressed.


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