Tesla semi

[Egon]

Looks like the best future for battery powered vehicles is underwater. Batteries will have a big future in submarine technology. But, they still need to run diesel motors about every 3-4 days to recharge.

Hydrogen fuel cells.

 

[two_bit_score]

Hydrogen fuel cells.

New battery technology is enabling submarines to be more stealthy. The WSJ had an article two days ago about a new Russian sub driven by batteries.

Here is an excerpt from the article:

"When underwater, enemy submarines are heard, not seen—and Russia brags that its new subs are the world’s quietest. The Krasnodar is wrapped in echo-absorbing skin to evade sonar; its propulsion system is mounted on noise-cutting dampers; rechargeable batteries drive it in near silence, leaving little for sub hunters to hear. “The Black Hole,” U.S. allies call it.

“As you improve the quieting of the submarines and their capability to move that much more stealthily through the water, it makes it that much harder to find,” said U.S. Navy Capt. Benjamin Nicholson, of Destroyer Squadron 22, who oversees surface and undersea warfare for the USS Bush strike group. “Not impossible, just more difficult.”

The rechargeable batteries are an integral part of this weapon.


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[RobS]

All, please keep things civil or the thread will be closed...

 

[two_bit_score]

While your statement is technically correct electric vehicles polute about 5 times less than ICE at the worst case and generate zero operation polution at the best case in example if recharged from water, wind or solar.

Another short sighted rationalization.

 

[two_bit_score]

Submarines run on nuclear fuel. They can stay under water until they run out of food.

You Russians tried nuclear and turned off on it after the Kursk disaster that killed 118 when the sub powered down and sank to the bottom.

 

[Egon]

You Russians tried nuclear and turned off on it after the Kursk disaster that killed 118 when the sub powered down and sank to the bottom.

It may be doubtful if we will ever know the actual details around the Kursk incident.

There is a German submarine that uses hydrogen fuel cells for underwater operation. It may be able to stay submerged for two weeks or so. It also is said to be very quiet.

 

[two_bit_score]

It may be doubtful if we will ever know the actual details around the Kursk incident.

There is a German submarine that uses hydrogen fuel cells for underwater operation. It may be able to stay submerged for two weeks or so. It also is said to be very quiet.

Hydrogen fuel cells is one of the most interesting developments ever.

 

[sd455dan]

New battery technology is enabling submarines to be more stealthy. The WSJ had an article two days ago about a new Russian sub driven by batteries.

Here is an excerpt from the article:

"When underwater, enemy submarines are heard, not seené*�nd Russia brags that its new subs are the worldç—´ quietest. The Krasnodar is wrapped in echo-absorbing skin to evade sonar; its propulsion system is mounted on noise-cutting dampers; rechargeable batteries drive it in near silence, leaving little for sub hunters to hear. å…¸he Black Hole, U.S. allies call it.

é„*s you improve the quieting of the submarines and their capability to move that much more stealthily through the water, it makes it that much harder to find, said U.S. Navy Capt. Benjamin Nicholson, of Destroyer Squadron 22, who oversees surface and undersea warfare for the USS Bush strike group. 哲ot impossible, just more difficult.

The rechargeable batteries are an integral part of this weapon.


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Well since we are going a bit off track...my :2cents:

I believe the US still has a silence edge on the Russian subs.

This quote from United States Naval Institute article also mirrors the one you posted:

According the Office of Naval Intelligence (ONI), while the new Russian submarine is quieter than the Improved Los Angeles-class boats, the new vessel is not quite as silent as the Seawolf or Virginia-class. However, the Soviets were always only lagging slightly behind U.S. in quieting technology according to Navy sources. The Russians are already building improved versions of the Yasen design.

This from wiki certainly sounds like Russia is still using Nuclear subs:

From the late 1950s through the end of 1997, the Soviet Union, and later Russia, built a total of 245 nuclear submarines, more than all other nations combined.[11]
Today, six countries deploy some form of nuclear-powered strategic submarines: the United States, Russia, France, the United Kingdom, China, and India.[12] Several other countries, including Argentina and Brazil,[13][14] have ongoing projects in different phases to build nuclear-powered submarines.


looks like India has a new sub of their own design and China does to- the 093B SSN both apparently utilizing Nuclear power generation.



i always thought the biggest secret to silence was the actual prop design/shape? and is what got Toshiba in so much trouble years ago... and certainly GREATLY reduced the edge in silence the United States had.

Submarined by Japan and Norway - NYTimes.com


Back to Tesla Semi thread

 

[CincyFlyer]

It takes a lot of power to keep 40 tons moving at 60 mph up and down hills bucking all that wind resistance for 500 miles a day. Not to mention trucks that are sleeper teamed that basically never stop moving except for fuel, meals and showers. The truck I last drove had a display that showed percentage of power used, it rarely dropped below 50%. Granted it was pulling 105,500# and was not designed to be aerodynamic. Still, it was constantly using 300+ hp just to move up and down the freeway. Average fuel milage was 4.1 mpg. Eighteen tires on the highway is a lot of friction to overcome, mine had 28, hence the milage. Battery technology hasn't progressed far enough yet, give it another decade or so.

It takes a lot of energy, but not a huge amount of power, to move twenty tons or more down the highway. Power and energy are not the same thing; we have all the power we can use for electric vehicles; we merely need an energy storage medium that is reasonable in size, mass, and cost. That hasn't happened, and there have been no astounding breakthroughs in my six decades, only a steady march forward.

 

[Egon]

[video]http://nationalinterest.org/blog/the-buzz/why-germanys-new-super-stealth-submarines-could-take-any-21021[/video]e

Nuclear submarine require constant mechanical operations for the power plant making for quiet limitations.