|
|
| Re: Acela Speed Question (1037155) | |||
 |
|||
| Home > SubChat | |||
|
[ Read Responses | Post a New Response | Return to the Index ] |
|
||
|
Re: Acela Speed Question |
|
|
Posted by LA Scott on Tue Feb 15 11:42:20 2011, in response to Re: Acela Speed Question, posted by TransitChuckG on Mon Feb 14 19:15:35 2011. Engines tend to run better at higher speeds, but as speeds go up so does air resistance.That means that MPG will go up with speed to a point where the efficiency gained by higher speeds will be balanced with the extra energy needed to overcome wind resistance. Faster than that, and the MPG goes down. One of the reasons that Hybrids do better in the city than the highway is that the regenerative breaking captures/reuses much of the energy wasted by deceleration/acceleration and low speeds, while the top speeds are not enough to enter the zone where efficiency goes down. |
|
|
|