Forums

Model X with active(?) rear spoiler

Model X with active(?) rear spoiler

Sighted June 26.

ian t.wa.us | 27 juin 2015

Yes indeed!

There was speculation over on TMC.com that the early mule spottings with camo over this area were hiding the attachment points for this very thing.

Was just coming to post this. I'll add it to the spotted thread.

Cheers!

modelx2015 | 27 juin 2015

What is the advantages of have this on the vehicle?

ian t.wa.us | 27 juin 2015

I always thought rear spoilers increased drag. I was wrong...

https://m.youtube.com/watch?v=TKH1DyV9vNU&feature=youtu.be

I even argued the add on S spoiler would decrease range. I see now how and why Tesla claimed the opposite. I bet the S refresh (when it happens) adds an active spoiler like this.

ian t.wa.us | 27 juin 2015

Hah! Overlapped posts with you modelx2015. Check out the linked video. It reduces drag, improving aerodynamics.

aesculus | 27 juin 2015

Good video.

Spoilers do induce drag. The video pointed out that airfoils don't and if you don't need the increased downward thrust on the tail, are what can help you reduce drag.

carlgo2 | 27 juin 2015

It also serves to break up a bit of that vastness at the rear and makes it more perfomancy looking, something the X may need.

johnse | 27 juin 2015

One thing that I've wondered about is whether the concept of energized vortices in the boundary layer have been studied for use in cars?

In many airplanes, small tabs called vortex generators are added to wing surfaces. A very simplified way of thinking about it is that these vortices act almost like tiny air bearings between the surface and the laminar flow air.

One very pronounced effect they have is to cause air foils to maintain flow (and therefore prevent stall--the rapid decrease in lift caused by separation of the flow above the foil) at much higher angles of attack--allowing airplanes to fly more slowly than they otherwise would be able to. I believe they are used on some commercial airliners to improve fuel efficiency.

Answering my own question at least in part, a web search shows there are aftermarket vortex generators... http://www.sigmaautomotive.com/performance/vortekz/vortekz.php

DTsea | 28 juin 2015

Vortex generators dont reduce drag. They increase it. They are added, grudgingly, if needed to manage stall behavior.

DTsea | 28 juin 2015

I referred above to wing VGs. Where they do reduce drag is on a bluff shape eg tailcone.

That might be the idea here.

On an airplane tgough a better shape is about always better than VGs... but cars are limited in length.

carlgo2 | 28 juin 2015

I would be kool if the Tesla version produced that compressed air effect like fighter planes do in extreme maneuvers. Drag or not, it would be worth it.

grant10k | 28 juin 2015

Wingtip vortices. You can see them on F1 cars sometimes, too. I assume you'd have to be going either super fast or during super humid weather. You're welcome to take a picture, but I hope I'm not in a position to see it (outside of a racetrack, I guess).

Red Sage ca us | 28 juin 2015

Does anyone remember the rules of drag racing a Hellcat? One of them was do NOT race anything with an active spoiler... So, you know...

carlgo | 29 juin 2015

I saw the winged Chaparral in I believe its first race, at Laguna Seca. In the rain, so there was this very dramatic effect with water and mist that was somewhat like the air vortices. I looked like an old unlimited hydroplane. I had a new camera, borrowed a telephoto and snuck into a perfect position to capture this and had one great shot after another. Not one turned out because the self-threading film feature didn't.

The innovative Tesla owner would adapt one of those outdoor misters and deploy it for the joy of doing so.

carlk | 29 juin 2015

That's cool. Just like my Cayman.

Brian H | 29 juin 2015

C-go;
You looked like an old hydroplane? How fast were you going?

carlgo2 | 2 juillet 2015

C-go;
You looked like an old hydroplane? How fast were you going?

More like a fine vintage speedboat, with more noise than speed.