How will we produce more clean electrical power? How to make the carbon footprint of an electric vehicle battery not be an ecological disaster? How to ensure that recycling a battery is not an ecological disaster? How to find enough rare raw material to make the cells and chemistry of the batteries in the long term? Who is today asking the question broadly enough from a societal point of view to take account of all these parameters? This is Carlos Tavares, general manager of PSA-Peugeot-Citroën's cars warning about electromobility.jm-urbani;n1125720 said:I think that anyway no sport engine maker will start a real engine research to make an engine to be used for the next 50 years when in max 20 years internal combustion engine will disapear
Hi, Chris:ckurz7000;n1125734 said:Storing electricity in batteries is a viable option where effiency is the topmost priority and weight/volume/endurance is not. That doesn't sound like battery powered aircraft will be commonplace any time soon.
However, hydrogen in combination with fuel cells might very well be. Hydrogen has an energy density of 142 MJ/kg whereas gasoline only offers 46 MJ/kg. The weight of the tank to safely contain hydrogen compressed at 700 bar needs to be factored in, however. The engine itself will be fully electric, so no internal combustion engine with its notorious ramshackle of moving parts and maintenance requirements.
I would expect that within about 10 years we will not be surprised anymore to meet hydrogen powered aircraft.
"HHHhhhhhhhmmmmmm" wonder where they stole that design? IBM, CRAY, NCR? BTW, supercomputer is a generic term. Super for what? The IBM 3090 is still the best overall business computer, because it has 256 independent I/O channels, so more users, more disk access, it isn't only about the MIPS, or Tflops.chrisk;n1125712 said:China can produce top quality items that compete with the best of them. Have some doubts, google worlds fastest super computer. Guess what, its in China. The problem with China is there is a substantial amount of crap that is passed off as a quality product. The buyer has to be savvy enough to know the difference.
Steve_UK;n1125581 said:""Not sure I'd trust my life to anything technical, created by the Reds.""
Thankfully your NASA astronauts take a different view as they soley rely on our friends in Russia ""................until another US manned spacecraft is ready, crews will travel to and from the International Space Station (ISS) exclusively aboard the Russian Soyuz spacecraft.""
Plenty of your SOG guys enjoying flying US operated Russian built Mil Mi-17s in hot sandy places today too.
Carlos Tavares's group PSA (one of the french car builders) states it is involved in electric car given the end of the petrop engines:Jean - Claude;n1125725 said:How will we produce more clean electrical power? How to make the carbon footprint of an electric vehicle battery not be an ecological disaster? How to ensure that recycling a battery is not an ecological disaster? How to find enough rare raw material to make the cells and chemistry of the batteries in the long term? Who is today asking the question broadly enough from a societal point of view to take account of all these parameters? This is Carlos Tavares, general manager of PSA-Peugeot-Citroën's cars warning about electromobility.
eutrophicated1;n1125624 said:Not sure the Red Chinese actually "reverse engineered" anything about that engine. That is to say, did they actually do a chemical analysis of the crankshaft, camshaft, valves, cylinders, heads, valve seats, valve springs, timing gears, and the assorted bolts, connecting rods, piston rings(each) and wrist pins. Each of these parts has a different metallurgical history of manufacture. I've made steel in the mills of Indiana; I know how complex the process and chemistry is. And I seriously doubt much, if any true reverse engineering was done on the Rotax engines. Having worked in all facets of the IT business for 25 years, believe me, if the Red Chinese want to co-opt a technology, they'll just steal it, like they did Microsoft Windows. And they won't care a whit, how many shortcuts they'll have to take, so long as it "looks similar" to the original.
I've worked with the mechanical engineers at General Motors, Ford and Chrysler Corporations, and I've heard how the Red Chinese manipulated their way into getting the technology they needed to make semi-decent automotive engines, engines they couldn't make on their own. Their manufacturing processes were the worst. Their cars still are among the poorest quality in the world.
Yes, Rotax could use some competition; and I invite you all in the free world to become that competition. Some say that the Rotax engines are an outdated design, that there could be newer ones that would be better. I've studied engine design for 50 years, and know that nothing really new comes up very often, mechanically speaking. The main advancements have been due to newer information in the materials sciences. If you want to see advancements, look to super-car, or formula 1 development, where extreme cost is not an issue. The mechanics are such that the inline 6 cylinder engine is still the most inherently in balance. The 1929 Lagonda V12 is still one of the smoothest-running engines ever made. The spark plug wires could be routed 2 completely different ways, and still you could put a glass of water on it without spilling any.
You want better engines? Simply replace the cam-driven, coil spring actuated valve trains with ECU controlled hydraullicly actuated valves.