If i can run an eletric motor at 80 RPM for 25 mile, how much eletricity wit it consume? what the formula?

Question

I am researching why is so hard to have an eletric car

Answer 1

You don't have enough information.  We would need to know the load on the motor, the size of the motor, etc.  And with so many different factors in there, it would be hard to give you a simple formula.

The reason why electric cars wouldn't work is because, with the current electric cars, you can drive about 100 miles before you need to recharge the batteries.  Who would buy a car that could only do 50 miles before you had to turn around and go back home to recharge?  Even if they doubled that, it would still suck.

Hydrogen isn't a good idea either because it is too combustable.  Gasoline doesn't burn, only the fumes do.  That is why you have to compress it for it to combust.  And on top of that, hydrogen cars use compressed hydrogen.  So a hydrogen car would be a rolling bomb.

If people want a better fuel source than oil, they will have to think more out of the box.  Ethynol would be good if we could support the infrastructure.

Answer 2

as stated need more data, however there are electric cars and plenty of suppliers for parts to convert most any car to electric ( google for examples).  so called performance electrics like Tesla are hoping there marketing trickery will fool you into thinking there not a blue hair ride with a 0-60 spec. unfortunately fast acceleration destroys the declared range. Weight and speed requires energy plane and simple.  if you want range slow and light is the way to go.

first what is your primary driving habit. daily commute most people live less than 25 miles from work so its perfect for this if you need longer range on occasion then keep your gas car as well, and use the electric for short commutes.

there is tax abatement's and other perks for owning an electric car and there is nothing that says it has to be your only car, as well as plenty or zero emission renewable energy sources for recharging the batteries.

don't worry we'll have alternatives soon everyone seems to forget oil is finite. all the easy oil is gone and the really difficult and expensive to get to will only last another 30 years or so.

Answer 3

here's two things to think about.

1 horsepower equals 745 watts.

So to have an equivalent 200 hp engine you'd need an electric motor putting out 150,000 watts. Watts = Voltage times amps; so a 24 volt battery bank would have to put out 6,250 amps. That is enough to fry a person if improperly done! A big truck battery will maybe put out 400 amps; so you start to see the problem. Now, the very sophisticated batteries in electric cars are more efficient, weigh less but there is still the problem of lugging around all that weight that is storing the energy...as opposed to lugging around 20 gallons of gas at 5 pounds a gallon.

Point Two, and the real killer of electric cars: WHERE DOES THE ELECTRICITY COME FROM TO RECHARGE THE CAR? If that power cord in your garage is being fed by a coal burning power plant, is there any net ecological gain?

Answer 4

The ship I was on was diesel electric and ran at around 80 RPM.   The props were around 20 feet in diameter, so probably used more power than any electric car would.   In other words, size and friction matters!

Answer 5

As mentioned there many parameters to consider to have your answer.

It is not hard to have an electric car. This the high performance, but, there other more family affordable cars too.

http://www.teslamotors.com/

Also, there many other applications besides electric.

The air car is supposed to hit the market in 2008, if, I remember correct.

http://www.theaircar.com/

The cars of the future are here. Hydrogen cars not only work, but, can be plugged into your house to power the house.

I believe the reason we not see a fast pace to bring these cars into the consumer "lime-light" is they milking Gas for all it worth. Considering Gas is just a byproduct of making other things from oil.

Heck, if they were not selling gas to us, then they would have to pay someone to dispose of the hazardous waste.

But, the bottom line; The cars are here. Most people just not know it until they start browsing the internet.

Answer 6

80rpm might do for a turntable, but it's no good on a boat.

Are you moving a dinghy or a liner?

Answer 7

I not sure, but, here an article you may learn some. This car was first built in the 1970's during the first gas price hike. The article is dated about 1980.

http://www.motherearthnews.com/Green-Tra...

http://www.motherearthnews.com/Alternati...

Answer 8

their is no direct formula their are to many variables to take into consideration