Elon Musk to make James Bond submarine car a reality
money.cnn.com
money.cnn.com
So, the title is false. Or at best, misleading. He is going to take a james bond movie prop and get it wet. He is not going to make [the] "james bond submarine car" a reality. This is somehow increasingly typical of Tesla stories that make it on HN.
[1] From wikipedia: "Musk plans to install a Tesla electric powertrain in the submarine S1 and make it transform into a road-going car. [6]" There is nothing in the story that say it would be a dry submarine. What it appears is that the <wet submarine> would be able to "transform" into a road-going car, in other words, just what wikipedia quote also says. CNN, viz: "I was disappointed to learn that it can't actually transform," Musk said in a statement provided by Tesla. "What I'm going to do is upgrade it with a Tesla electric powertrain and try to make it transform for real." But a power train is not a pressure hull(https://en.wikipedia.org/wiki/Submarine_hull#Pressure_hull), which is what would be required for a dry sub.
Also, isn't it strange that some company PR is taking time to reply to it's CEO's shenanigans?
Subs are not energy efficient. Water is 1,000x more dense than air, & moving through it takes far more energy.
And, hybrid (land+water) is going to require far more hardware, driving up the price & weight (& thus efficiency) of a vehicle.
But, it's cool & he has the budget & gumption for it, so THANKS Elon, for keeping us entertained!
Yet.
I don't disagree that this is impractical, and you could be right that subs are inefficient, but the density argument alone doesn't seem sufficient, because propellers (and presumably other means of propulsion) also generate a lot more lift in water than in air.
So while a 2mph sub is more energy efficent than a 200mph aircraft the sub is rather impractical even pushing the sub to 20mph means the aircraft wins.
2 mph might be fine for a billionaire's private submarine yacht. If you're a billionaire and you're in a hurry, just transfer to the private jet.
Sarcos had the technology for full-body haptic feedback harnesses of the type that were somewhat portrayed in Pacific Rim, and they had this in the 90's, if I recall correctly. DARPA had arm/shoulder/head haptic feedback projects even back in the 70's and 80's.
The problem is that the human form factor is quite complex, and it will always be cheaper to make a simpler specialized tool. Humans are scary good at controlling things, even without haptic feedback.
Transformers: Just physically impossible for anything more functional than a movie prop. (Ok, maybe Monster Truck rallies.)
This is after spending a million dollars on it (literally).
http://jalopnik.com/zomg-elon-musk-to-turn-lotus-submarine-i...
Top Gear made their submarine car Lotus, but it was considerably compromised as both a car and a submarine. Can't really be debonair when a stream of water is squirting onto your tuxedo trousers. It only held water out of the cockpit by having air pumped in at a high rate.
Howard Hughes was no Elon Musk. Musk is way more impressive.
Hughes inherited a fantastic business from his father and made a lot of terrible business decisions.
Rinspeed design tryed it and the closest they got was the scuba concept that is open for exactly that reason.
Then, when he falls out of favour with the press, they'll eat him alive.
All these bogus stories of Elon the superhuman mega genius aren't good for him in the long run. He can't live up to it and he shouldn't play up to it. He's being set up.
EDIT: Paradoxically, I think it's about time an Engineer gets treated like a star. He's a great role model for kids.