Gravity Delivery Discussion

[tonybot]

I did some internet digging before ordering a black Gravity in south Florida. There actually have been quite a few studies that showed car color can add as much as 20º F to the interior of a car parked in direct sunlight. Apparently, a car's sheet metal conducts heat so efficiently into the space inside the panels that some of that heat does transfer to the cabin. However, most of the studies didn't say whether the cars tested had metal or glass roofs. My guess is the heat gain through the Lucid's massive glass canopy will overwhelm the heat gain through the sheet metal panels.

Our Air is Zenith Red with the glass canopy. Although that is a dark color, we have never found the A/C to be unable to keep the cabin cool, even on road trips in 108-110º temperatures or sitting in airport cell phones lots in temperatures nearing 100º. And reports are that the Gravity A/C system is completely re-engineered for significantly more output.

Not sure if you saw this comment on the Gravity A/C from the owner who recently took delivery of the Dream Gravity. It might very well be a lot better than Air, but seems like there are still some opportunities.

Post in thread 'First Dream Edition Delivery!'

Thursday at 9:29 PM

Hi there! Quick question: How is the built quality? Is there any rattling or squeaking? I know the car is extremely quiet, so I am wondering if the quietness amplifies internal noises. Thanks! Congratulations again!

Build quality is top notch. I haven’t found any “annoying” build quality issues yet, which is terrific.

No squeaks, whines, or anything else so far.

The AC is still just “ok”. The decision to have the vents relatively narrow slot style (just like the air) was a poor choice and one I wish wasn’t made, but I can see that it was done for aesthetic reasons. You can’t...

• Osyris

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[TahoeMichael]

Car color just isn’t going to affect interior temperature. There’s way too much stuff between the body panels and the interior. Also these cars come with A/C.

I only have my own anecdotal experience. But at one point I owned two similar vehicles, one a dark red, the other white, and it was remarkable how much cooler the white one was after being parked side by side in the sun. Obviously you'd expect the AC to keep up when it was running. But with an EV, you'd also have to expect some incremental range drop from that.

After that experience with the two colors, and owning dogs, we now only buy white cars. That said, I've never owned a vehicle with a pet mode that will run the A/C while the car is parked.

 

[suyoungman]

Spoke with my SA again today, who indicated that many DE's will be delivered before EOM, including mine. He also shared that there were a few GT's getting VIN'd, which is odd considering how they're prioritizing DE's at this time.

Vin'd just now. SA shared that I should expect delivery towards EOM.

 

[brianman]

There actually have been quite a few studies that showed car color can add as much as 20º F to the interior of a car parked in direct sunlight.

Have you seen similar studies on the interior?

Anecdotally, I feel like the white seats in Tesla Model 3 make a difference vs. black on the heat inside.

 

[hmp10]

Have you seen similar studies on the interior?

I haven't.

 

[bbargfr2]

I haven't.

This isn’t maybe the most scientific study as there seem to be a mix of seating materials (and maybe some shadows at the end), but I though it was an interesting test.

 

[pezpunk]

l never respect anyone who buys a white car. why do you want to look like you're driving a rent-a-car?

 

[hmp10]

This isn’t maybe the most scientific study as there seem to be a mix of seating materials (and maybe some shadows at the end), but I though it was an interesting test.

Well, that was a bit unexpected. Maybe my choice of an Abyss Black Gravity with the Yosemite interior wasn't such a bad choice for south Florida.

We also have an Aurora Green / Tahoe Gravity on order. When they're both here maybe I can run a similar test.

After you first asked the question about interiors I did a bit of internet searching. While I didn't find any controlled studies such as the ones on the effect of exterior colors, I did find quite a few AI answers and anecdotal reports on the effect of interior colors. But I really didn't know what to make of them. They said that dark interiors absorb more heat and make the interiors hotter than light interiors that reflect the light. That certainly would seem right for the seat surfaces themselves. However, when a lighter seat reflects more light energy, that energy has to go somewhere. I wasn't sure whether it would pass back through the glass or whether some of it would still contribute to raising the ambient interior temperature.

The original question raised here was about all the black Gravities going to Saudi Arabia. But I had earlier noticed from the drone flyovers that a large number of them had the Yosemite interior. Much bedouin garb is in dark colors that supposedly help deal with desert heat. Maybe the Saudis know more about how to configure a car for hot desert conditions than we think?

 

[borski]

I did find quite a few AI answers

So… complete guess and fabrications?

Much bedouin garb is in dark colors that supposedly help deal with desert heat.

This is true! I spent some time with a bunch of Bedouin in the Negev desert for a while (long story), and they were incredible people who made the absolute best coffee.

I asked about the black robes; they wear it because it makes them sweat, and in the desert, sweating is how you cool off. Every breeze feels like A/C when your skin is wet/moist. The cooling happens by convection; either through a bellows action, as the robes flow in the wind, or by a chimney sort of effect, as air rises between robe and skin. That’s why their robes are always very loose; lots of air flow.

The wind convects the heat away faster from the body than it is absorbed. White clothing reflects sunlight, but also reflects internal heat back towards your body, so the net effect under identical conditions is less cooling than if you wore black.

They also herd and keep black goats.

The catch is, nobody is sweating in their vehicles, because they have A/C.

 

[WildRide47]

So… complete guess and fabrications?


This is true! I spent some time with a bunch of Bedouin in the Negev desert for a while (long story), and they were incredible people who made the absolute best coffee.

I asked about the black robes; they wear it because it makes them sweat, and in the desert, sweating is how you cool off. Every breeze feels like A/C when your skin is wet/moist. The cooling happens by convection; either through a bellows action, as the robes flow in the wind, or by a chimney sort of effect, as air rises between robe and skin. That’s why their robes are always very loose; lots of air flow.

The wind convects the heat away faster from the body than it is absorbed. White clothing reflects sunlight, but also reflects internal heat back towards your body, so the net effect under identical conditions is less cooling than if you wore black.

They also herd and keep black goats.

The catch is, nobody is sweating in their vehicles, because they have A/C.

So after that informative information by Borski, I go back to my original question. Why would anyone want to order a black car in Saudi when the temperatures can go up to 115-120 degrees?

 

[DeaneG]

So after that informative information by Borski, I go back to my original question. Why would anyone want to order a black car in Saudi when the temperatures can go up to 115-120 degrees?

Agreed - if your car starts sweating, you've got a problem!

 

[hmp10]

So after that informative information by Borski, I go back to my original question. Why would anyone want to order a black car in Saudi when the temperatures can go up to 115-120 degrees?

Based on the video @bbargfr2 posted, it might be more of a question not just of exterior color but of the exterior/interior color combo. Dark/dark has the most heat gain. Light/light has the least. But light exterior / dark interior can get hotter than dark exterior / light interior. And a lot of those cars bound for KSA have light interiors.

Also, maybe most people think a vehicle such as the Gravity looks better in dark colors. With more heat gain through the large glass surfaces than the metal panels of the Gravity, black might not matter that much in terms of heat gain.

And, as @borski points out, with A/C it just isn't a concern, with buyers placing more priority on the aesthetics they desire than worry about A/C load and its effect on range.

 

[Kevmark58]

I'm rather glad to see this from a purely selfish perspective. It means the production line is gaining experience and probably ferreting out minor glitches before Dream Editions start rolling off the line in bigger numbers -- something that avoids Dreams being the very first cars produced, which is something that worried me.

As I posted earlier, there were several changes/improvements between the Air Dream No. 154 we first received and the Air Dream No. 395 we bought after the first one was wrecked.

I couldn't find those comments, but what did you notice improved from your early production unit and the replacement?