HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Blogs
Electronics News

Secrets for a 1,500-MPG Car Revealed

NO RATINGS
View Comments: Newest First|Oldest First|Threaded View
<<  <  Page 2/3  >  >>
SiliconGraybeard
User Rank
Gold
Re: Impressive But Is It Remotely Practical?
SiliconGraybeard   8/22/2016 1:49:18 PM
NO RATINGS
Sure this is just a flared motorbike, but that IS practical for the vast majority of communters.  

I think that may be a matter of where one lives, but it should certainly be left up to the commuters involved.  For example, it's currently 91 with a heat index of 103 here, and that's typical for a third to half the year.  Without air flow from the outside, and a powered fan, both of which inevitably increase drag and reduce efficiency, I don't think it sells here beyond a percent or two.  If they're doing 1500 MPG and running an air conditioner, that's quite an accomplishment!

I also question the practicality of single driver commuter cars, which seems to  necessitate a working family having three cars instead of two.  How much is a family supposed to spend for this? 

megadesign@windstream.net
User Rank
Silver
the cube of things
megadesign@windstream.net   8/22/2016 1:30:10 PM
NO RATINGS
I played with mileage and ran experiments and those were not my actual results.  I took VW engines and moved them to vehicles with 4 times the weight and only lost a little less than 1/2 the gas mileage.  I have driven slow and have decreased mileage.  My friend experimented with engines for an engine company and they discovered that engines had their best efficiency at a given speed.  Any slower or fast the engine went the efficiency droped off.  It led me to believe that a variable transmission would be most effective.

ttemple
User Rank
Platinum
Re: More info
ttemple   8/22/2016 1:17:34 PM
NO RATINGS
The power required to propel an object through the air is a function of the cube of the velocity.  This means if the speed doubles the power consumed is 8 times as much (2 * 2 * 2).  So, to go from 15 mph to 60 mph the speed increases by a factor of 4.  the cube of 4 is 64, so the power required at 60mph is 64 times the power required to go 15.  This is all neglecting friction.  It is reasonable to assume that consuming 64 times the power would decrease the mileage by more than a factor of 4.

Here is an example of a calculator that will show this relationship:

https: // www.gribble.org / cycling / power_v_speed.html

Rigby5
User Rank
Gold
Re: Totally separeate from any real world situation.
Rigby5   8/22/2016 12:24:34 PM
NO RATINGS
You miss the point.  If you can get fantastic mileage, you do not NEED pollution abatement system.  Even if the parts per million of exhaust were off the charts, it would still produce only a tiny fraction of the total emission of a car getting worse mpg.

That is the same confused mentality that is forcing VW to modify all their diesels to stop getting 56 mpg, and instead only get 33 mpg.  Obviously the EPA is not trying to reduce pollution, but to prevent competition to luxury US made cars that are more profitable.

As for safety, if 80% of the cars on the road were little composit fiber commuters, then the death and injury rate from accidents would plummet.  The larger and heavier the car, the more destructive energy there is.  There is no way around that.

Rigby5
User Rank
Gold
Re: Impressive But Is It Remotely Practical?
Rigby5   8/22/2016 12:18:14 PM
NO RATINGS
No, an EV could never get such good mileage because of the weight of the batteries.  

Sure this is just a flared motorbike, but that IS practical for the vast majority of communters.

William K.
User Rank
Platinum
Totally separeate from any real world situation.
William K.   8/22/2016 11:53:34 AM
This post is about an expensive vehicle that probably did not meet any of the safety standards anywhere and did not hold a speed that would be acceptable any place except a school zone. On top of that it is a one passenger vhicle that probably does not even have space for the driver's lunch.

BUT publicising this achievement will convince our lawmakers that it is simple, cheap, and easy to produce a super-high milage vehicle. So aside from being a really interesting senior project what benefit has it delivered, except to NI as a advertising item.

If it were not for all of the pollution control equipment and all of the safety systems designed to protect negligent and unskilled drivers, most cars could get far better milage. Just consider the VW deisel fiasco, where bypassing the excessively tight emissions controls produced far better miage and better performance as well.

megadesign@windstream.net
User Rank
Silver
Re: More info
megadesign@windstream.net   8/22/2016 11:27:36 AM
NO RATINGS
I didn't realize that they were going 15MPH but it is still very interesting.  If the speed was 60MPH then I might expect 1500/4 or 375 MPH and that is still good.  It is also in line with the way President Jimmy Carter thought when he reduced the highway speed to reduce oil useage.  I would also hope that the higher speed would not reduce the MPH by so much.

John_Reed
User Rank
Gold
Re: Pending Review
John_Reed   8/22/2016 9:40:31 AM
NO RATINGS
1500 mpg for a super light car with solid or high pressure tires on a flat course? Maybe one light weight occupant? Seems roughly in line with railway freight hauling efficiency. What's the maximum grade this car can climb? Can it reach a safe highway speed? I once rode down I-75 through Atlanta in a diesel Rabbit about 20 mph slower than the other traffic, an experience I swore never to repeat.Fuel efficiency doesn't mean much on a trip if you finish via Lifestar herlicopter.

If I build a piece of electronic equipment and perform standard EMI testing I can make performance claims that mean something.  There ought to be a standard course for performance tests on super efficient cars.

 

Battar
User Rank
Platinum
Actual miles
Battar   8/22/2016 9:32:55 AM
NO RATINGS
1500 mpg fuel efficiency is not the same as covering a distance of 1500 miles while burning no more than 1 gallon of fuel.

onederer
User Rank
Iron
Now for the big cars.
onederer   8/22/2016 9:11:54 AM
NO RATINGS
This winner for the 1K+ fuel milage car is great, and a commendable achievement. However, in everyday life, using an anemic engine is not very practical for everyday usesage.

Even though a larger common vehicle would never be able to achieve such great gas mileage, imagine that by using this technology, how much of an improvement in fuel ecomomy could be achieved in common every day life.

It could be done soon, if by overcoming the protests of the oil cartel, and the politics. And of course, the close-minded auto manufacturers would have to loosen up their mindset, and open up to the technology. After all, they are not the ones who have come up with that technology. Do you think that the student's achievement may have hurt the big boys' ego?  

Perhaps having to do away or scaling down the anti-pollution devices that weigh down a vehicle, would also help? It could eficiently be controlled electronically, the same manner as the experimental vehicle has been designed.

<<  <  Page 2/3  >  >>
Partner Zone
More Blogs from Electronics News
Five years ago, optical heart rate tracking seemed like an obvious successor to the popular chest straps used by many fitness buffs, but the technology has faced myriad engineering challenges on its way to market acceptance.
Optical heart rate monitors, hailed as a promising new technology when they hit the market a few years ago, are starting to see some backlash.
Forget doping. Officials at this year’s Tour de France are looking for a very different form of cheating -- electric motors hidden inside the seat tubes of bicycles.
Design engineers need to prepare for a future in which their electronic products will use not just one or two, but possibly many user interfaces that involve touch, vision, gestures, and even eye movements.
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6 |  7 | 8 | 9 | 10


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Technology Marketplace

Copyright © 2016 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service