Pekino Tsinghua Universiteto Studentai
Įvertinimas: (balsavo: 170)
Marija Čepulytė
Vieta: Kinija, Pekinas
Autoriaus komentaras: Pakalbinau Pekino Tsinghua Universiteto Studentus. Paprašiau, kad ištartų frazę "Lietuva - Baltijos Širdis" savo gimtosiomis kalbomis - lenkų, švedų, rusų, kazachų, mjamų, čekų, farsi, prancūzų, olandų, vokiečių, anglų, ispanų, indonezijiečių ir, žinoma, kinų.
Komentarų: 16
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I even heard of some USA-available gasoline-powered cars arnuod 1980 andin the early 1980′s achieving 40 MPG highway, with essentially no improvementfrom that in about 30 years. What’s up with that?The law of diminishing returns and reality!All (most) of the easy gains in fuel economy have already been made back in the 1970 s when there was a big push to cut fuel costs. It takes about 12-15 hp to move a typically sized passenger car at 60 mph steady road speed. Modern engines burn about .5 lbs of gasoline to produce one horsepower for one hour. Highly optimized engines such as light aircraft engines at light throttle cruise can get down to specific fuel consumptions of about .34 lbs of gasoline per horse power hour.In the first case that means at 60 mph a typical car would consume 6-7.5 lbs of gasoline per hour. Given gasoline weighs about 6.5 lbs/gallon that gives a theoretical top fuel mileage of 52-65 mpg at steady state highway cruise. These just happen to also be the very best fuel mileages claimed in real world cars today. A 1970 s vintage Morris cooper could get just short of 50 mpg if driven for maximum economy. Throw in the fact that in the real world the roads are not perfectly flat, you sometimes have a head wind, you occasionally have to slow down and speed up due to traffic, and even on occasion, shift down to climb a hill or accelerate to pass. Not to mention that human drivers have difficulty holding an absolutely uniform speed, have to stop for traffic lights (where you get 0 mpg) etc. means we are doing pretty good to get up to 40 mpg on a practically sized sedan or small utility vehicle. Unless folks are willing to drive a car with the aerodynamics of a tear drop, ride on rock hard tires to lower rolling resistance, and have a commuter car that will only carry 1-2 passengers, all the technology in the world will not get you real world fuel consumption much higher than 40-50 mpg.Even if you use a highly optimized engine like a modern light aircraft engine running at ideal lean mixtures at steady state rpm (no acceleration, deceleration) and can achieve .4 lbs of fuel per horsepower hour you still can only get to peak theoretical fuel consumptions near 80 mpg at highway cruise speeds of 60 mpg with current body styles and vehicle weights.The dominant forms of drag at highway speeds are mostly aerodynamic and some rolling resistance. Tire manufactures have already milked about as much out of low rolling resistance tires as they are likely to get in a wheel tire combination that also gives reasonable traction and ride characteristics. Except for a few most people do not want to ride to work in a car that looks like a torpedo on wheels for significant reduction in aerodynamic drag. They also want comfortable seating, a nice stereo, seating for 4 adults and even a bit of cargo area so they can haul the family to soccer practice or pickup a load of groceries on the way home from work.Larry
Sveika, Marija. Labai šaunus video, man labiausiai iš visų patinka : ) hm, kaip supratau, mokaisi Tsinghua universitėte? Norėčiau truputį informacijos apie šį universitetą ~ Būtų šaunu jeigu man parašytum.~
Prisidedu is Suomijos, Liettua-Baltian sydän!
labai graži idėja ir įdėta daug pastangų;)
Patiko labai
Suuuper. Ir ideja grazi ir ..., viskas super.
vienareikšmiškai geriausias!!!
padirbėta...sveikinu Marija
Marija Čepulytė:
Taurai, ačiū :)

Stas, I wish I had met anyone from Ukraine yesterday! But I did not :(
Stas, Ukaraine):
in ukrainian - "Литва - серце Балтики" =))
Žiauriai kietai ;]
Vardas, pavardė
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