Is Carbon Hood 100% Carbon?

[old phart]

So I took a rock square on the leading edge of the hood. Left a dent about the size of a quarter. Left a big chip and it looks to me that it's aluminum under there? 2009 DB9 and I know it's a carbon hood as you can see the weave pattern if you really look closely at the right angle. Is there a bit of aluminum along the leading edge? I'd have thought carbon would have shattered or cracked or something.

[roughrider]

You have an all ALUMINIUM BONNET sir......

[DB9VolanteDriver]

old phart said:

...2009 DB9 and I know it's a carbon hood as you can see the weave pattern if you really look closely at the right angle.

You are obviously seeing things...

[CSK1]

Perhaps you own a DBS, that one has a carbon bonnet/hood.

Edited by CSK1 on Monday 31st October 12:19

[12pack]

roughrider said:

You have an all ALUMINIUM BONNET sir......

in case of translation issues for old phart in CA...ALUMINIUM BONNET = ALUMIN UM HOOD.....

[old phart]

Soooooo. I'm actually glad to hear not carbon. And feel a bit stupid. First Aston and swear I had read somewhere that the hood/bonnet was carbon. Even purchased the 'bible' but apparently didn't read it that closely. I must say it's amazingly light for being as big as it is and aluminum. Now I'm really interested in how much lighter a carbon bonnet could actually be.

Thanks for not giving me too much crap on my ignorance.

[mybrainhurts]

It's the carbon tires you've got to watch out for...

[RobDown]

old phart said:

Soooooo. I'm actually glad to hear not carbon. And feel a bit stupid. First Aston and swear I had read somewhere that the hood/bonnet was carbon. Even purchased the 'bible' but apparently didn't read it that closely. I must say it's amazingly light for being as big as it is and aluminum. Now I'm really interested in how much lighter a carbon bonnet could actually be.

Thanks for not giving me too much crap on my ignorance.

Yep, fingers crossed should be easier to fix than a carbon fibre one

[telum01]

old phart said:

Soooooo. I'm actually glad to hear not carbon. And feel a bit stupid. First Aston and swear I had read somewhere that the hood/bonnet was carbon. Even purchased the 'bible' but apparently didn't read it that closely. I must say it's amazingly light for being as big as it is and aluminum. Now I'm really interested in how much lighter a carbon bonnet could actually be.

Thanks for not giving me too much crap on my ignorance.

I weighed my V8V hood a few days ago and it was about 25 lbs, fairly heavy but it's also massive. Heavier than I expected it to be, but the size justifies it. The gas struts help with the wait, so it feels lighter than it is while it's on the car.

[leerandle]

Based on comparison of Aluminium density (2.7g/cm3) versus Carbon fibre/epoxy (1.55g/cm3) then if 'like for like' design, you would expect an app. 40% weight saving if you had a carbon fibre bonnet.

[DB9VolanteDriver]

old phart said:

Now I'm really interested in how much lighter a carbon bonnet could actually be.

CF bonnet is MUCH lighter. You can move it around using two fingers as compared to the alloy version.

[66MK]

...and of course without a photo...

[TKP]

leerandle said:

Based on comparison of Aluminium density (2.7g/cm3) versus Carbon fibre/epoxy (1.55g/cm3) then if 'like for like' design, you would expect an app. 40% weight saving if you had a carbon fibre bonnet.

On top I would guess you can go with less material; however, part of the weight probably is also the coating so you best go without any color :-)

[Ken Figenus]

If I remember correctly a DBS with a few more carbon fibre panels (but not all) is about 60kg lighter than a DB9. Was chuckling as someone tried to pop a magnetic GB sticker on one just before the ferry once