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Ford Aims to Boost Fuel Efficiency With Lightweighting

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Jerry dycus
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Gold
Re: Carbon, eh?
Jerry dycus   5/19/2015 7:25:33 AM
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CF recycles into various HC's or back into resin and carbon.  Just heat to 700f to gas off the resin and CF is left.

Why would you think otherwise?

But the question is why are they using CF when medium tech compsites cost 10% of CF and are better.

They are using CF for hype to drive up the cost on purpose because they want more money and want to prove that composites are not worth it by their actions.

Fat is big auto is scared to death of composite cars as they cost so little for start up.

A composite production line costs 10% of a steel, alum one also eliminates the body/paint shops as it comes already finished. 

Jerry dycus
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Gold
Re: lighter, better,
Jerry dycus   5/19/2015 7:19:10 AM
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Sorry but CF should cut battery weight by 50% too .

And the battery weight in the i3, about 400lbs, isn't much as eliminating thei weight above other steel ones.  So without the battery pack weight the they still weigh the same or more than a steel subcompact both are.

Vs they should weigh much less but because of very bad design, they don't. 

 

RichardBradleySmith
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Silver
Carbon, eh?
RichardBradleySmith   5/18/2015 11:32:00 PM
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Sexy, but it doesn't recycle. Which seems to be okay for planes and sailboats but mass produced cars?

przemek
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Re: lighter, better,
przemek   5/18/2015 12:46:11 PM
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"Next the aero quote there is no way air flowing through the body makes less drag than going around it from surface friction, intersection drag."

I think you are assuming equivalent cross section, but I believe they have figured out a way to open up dead space in the chassis. The air resistance is proportional to Cv*area, and Cv probably goes up a little due to the reasons you mention,  but if the area may drop significantly to offset that.

 

patb2009
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Gold
Re: lighter, better,
patb2009   5/18/2015 12:15:38 PM
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"Like the i3 that weighs more that a metal car the same size. What's up with that? "

 

Battery.

 

 

Jerry dycus
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Gold
Re: lighter, better,
Jerry dycus   5/18/2015 11:39:33 AM
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Almost every new model change has come in the last 3 yrs have been 10% or so lighter so not a new trend.

But better design, use of foam, medium tech omposites could cut it's weight by half!!  Not only that but cut labor, paint/body shop thus costs massively but they can't bring themselves to do that.

Next the aero quote there is no way air flowing through the body makes less drag than going around it from surface friction, intersection drag.

So mostly we have hype without even how much it weighs data.

Like the i3 that weighs more that a metal car the same size. What's up with that?  The i8 is almost as bad. 

Jerry dycus
User Rank
Gold
Re: lighter, better,
Jerry dycus   5/18/2015 11:39:33 AM
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Almost every new model change has come in the last 3 yrs have been 10% or so lighter so not a new trend.

But better design, use of foam, medium tech omposites could cut it's weight by half!!  Not only that but cut labor, paint/body shop thus costs massively but they can't bring themselves to do that.

Next the aero quote there is no way air flowing through the body makes less drag than going around it from surface friction, intersection drag.

So mostly we have hype without even how much it weighs data.

Like the i3 that weighs more that a metal car the same size. What's up with that?  The i8 is almost as bad. 

Battar
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Platinum
Half measures
Battar   5/18/2015 9:27:00 AM
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Reducing weight means reducing power required to meet performance, which means they can use a lower-powerd, smaller engine. But that isn't what it's about, is it? 

Citroen used composite body panels in the BX saloon in 25 years ago. 

patb2009
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Gold
lighter, better,
patb2009   5/16/2015 3:24:04 AM
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lighter pays off,  shave 1000 lbs off the frame, lets you shave 200 off the engine,

which lets you shave 50 off the suspension

 

That makes the suspension better,  it makes the system better.

 

 

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