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Search: Posts Made By: lca13
Forum: General Fuel Topics 06-22-2007, 06:11 PM
Replies: 59
Views: 7,486
Posted By lca13
The derby analogy only applies if you are...

The derby analogy only applies if you are fortunate enough to drive downhill everywhere you go.

I had a girlfriend once that use to jog a circular route around her neighborhood and claimed it was...
Forum: General Fuel Topics 06-22-2007, 02:51 PM
Replies: 59
Views: 7,486
Posted By lca13
Another real world consideration is that real...

Another real world consideration is that real driving can never be pure pulse and glide... there will be some amount of steady state, engine load cruising, and don't think for a minute that you are...
Forum: General Fuel Topics 06-22-2007, 02:47 PM
Replies: 59
Views: 7,486
Posted By lca13
Yeah, I know, this is desperately starting to...

Yeah, I know, this is desperately starting to sound like a perpetual motion argument. Sure a 100 HP engine in a 50 lb car probably won't do any better than in a 100 lb car, because the waste energy...
Forum: General Fuel Topics 06-22-2007, 01:21 PM
Replies: 59
Views: 7,486
Posted By lca13
So in the actual car case, however, the argument...

So in the actual car case, however, the argument won't work though, since the efficiencies at the various loads are going to be pretty much the same. The acceleration loads are always at worst...
Forum: General Fuel Topics 06-22-2007, 11:09 AM
Replies: 59
Views: 7,486
Posted By lca13
ok, I am dense, dense, dense on this.......

ok, I am dense, dense, dense on this.... Intuition tells me you are all right and I am missing something.

So the argument is, even though it does take more energy in the greater mass case, you can...
Forum: General Fuel Topics 06-22-2007, 10:03 AM
Replies: 59
Views: 7,486
Posted By lca13
I get the idea, but the numbers we are throwing...

I get the idea, but the numbers we are throwing out are pure conjecture. It would be nice to have some experimental data to support them, or theory to predict them.... I am not saying they are...
Forum: General Fuel Topics 06-22-2007, 05:59 AM
Replies: 59
Views: 7,486
Posted By lca13
The "downhill" factor can change things and make...

The "downhill" factor can change things and make it look like you get better FE with a heavy or sweet spot car... I am still not convinced you win overall.

Longer glides are a factor of increased...
Forum: General Fuel Topics 06-21-2007, 03:59 PM
Replies: 59
Views: 7,486
Posted By lca13
Here's another thought.... the railroad industry...

Here's another thought.... the railroad industry certainly would know the answer to this question, is a train is the ideal experiment vehicle. I would be very surprised if they said that adding...
Forum: General Fuel Topics 06-21-2007, 03:55 PM
Replies: 59
Views: 7,486
Posted By lca13
Interesting thought experiment i have to admit. ...

Interesting thought experiment i have to admit. Something doesn't click in my head though because still, basically, your deceleration rate (linear with respect to your mass) is the inverse of your...
Forum: General Fuel Topics 06-21-2007, 12:33 PM
Replies: 59
Views: 7,486
Posted By lca13
Doesn't conservation of energy prohibit this? ...

Doesn't conservation of energy prohibit this? You cannot accelerate any mass and decelerate it in such a manner as to gain energy or keep it a constant, you will only lose it.

So while it seems...
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