Quentin
QUOTE: Originally posted by uzurpator Modelcar - the bicycle+rider in question did it by themselves. Without any outside help. That is the real record. With shielding the speed was over 150 mph...
QUOTE: Originally posted by uzurpator I don't really see a problem here. Making a car with 200-250 mpg is perfectly feasible.
QUOTE: Originally posted by Lotus098 QUOTE: Originally posted by uzurpator Modelcar - the bicycle+rider in question did it by themselves. Without any outside help. That is the real record. With shielding the speed was over 150 mph... Can you fill me in, maybe I missed a realted topic. I don't really think you are trying to tell me someone got a bike to do 150mph.
Have fun with your trains
QUOTE: Originally posted by uzurpator I don't really see a problem here. Making a car with 200-250 mpg is perfectly feasible. Ofc it's not going to look like a big SUV, but still - doing 60-70 mph would be pretty easy.
-Don (Random stuff, mostly about trains - what else? http://blerfblog.blogspot.com/)
QUOTE: Originally posted by uzurpator Modelcar - the record in fuel consumption is 5385 km on one litre of fuel. That is - if my math is correct - 12465 mpg. Oltmann - look above and tell me again that it is impossible to make a viable car 250 mpg with todays technology. Ofc its going to look different then what you are accustomed to - but its going to run just fine ^^ The record in human powered vehicles (when the human is the sole source of power :P) belongs to Sam Wittingham on a bicycle Varna Diablo. That is 81 mph with less then 1 hp.
QUOTE: Originally posted by donclark That's the kind of change we need here in America. Drop those speed limits down to 20 mph as in Bermuda, and change our vehicle of choice to a scooter..... As far as nulear waste is concerned, 99 percent of the contaminated waste is gone in 10 years, and another 99 percent of that is gone in 100 years. In fact, the uranium that is mined is more toxic than what's left after 100 years.....
QUOTE: Originally posted by Modelcar ....We will not see any practical 250 mpg "car" anytime soon powered by an internal combustion engine....Just not possible in any reality terms.
QUOTE: Originally posted by oltmannd It is not possible to make a 4 passenger sedan with the same interior room and trunk space as a Ford Focus with heat, air conditioning, and that will meet federal crashworthiness standards that will get more than 100 mpg, no matter what shape it is or how you power it. 250 mpg is just silly. You might as well be talking about pedal-powered commercial aircraft!
QUOTE: Originally posted by uzurpator QUOTE: Originally posted by oltmannd It is not possible to make a 4 passenger sedan with the same interior room and trunk space as a Ford Focus with heat, air conditioning, and that will meet federal crashworthiness standards that will get more than 100 mpg, no matter what shape it is or how you power it. 250 mpg is just silly. You might as well be talking about pedal-powered commercial aircraft! I'd hazard saying that it is possible. It would require quite revolutionary approach - in terms of design (power transfer, aerodynamics etc), but it is possible to get to that magical 250 mpg. A few things to consider: Weight - current cars are terrible in a matter load/tare weight. Accelerating the vehicle is pretty much accelerating dead weight - and a fuel hog at the same time. Now - personal motorized vehicle may weight about 300-350 lb - compare to 2000-3000 of the current cars. 4 Person verion may be 400-500 lb. Aerodynamics - a car at 60 mph is towing several _tons_ of air. Since the air drag goes up with a square of speed - biggest gains can be obtained there. The said 250 mpg car will attempt to streamline the body and reduce frontal area. The seating position will be much more reclined in effect and the whole vehicle a tad longer then current cars. Drivetrain - current cars are terrible here. Power transfer to the wheels is at most 70% efficient. Usually lower. In a comparsion - a chain drive with a planetary gearbox will be about 95% efficient (pure chain is 98-99% efficent). The requirement: the vehicle has to be a trike (rear wheel driven, two front wheels). As a bonus we get lower rolling resistance. None of this is actual rocket science - but such ultra light vehicle will easily get to at least 150-200 mpg, and with some refinement 250 mpg. The point is however, that oil is dirt cheap - so current cars are what they are - big and heavy fuel hogs. You really underestimate how much energy is stored in a gallon of fuel :)
QUOTE: Originally posted by Lotus098
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