new tvr 400se bonnet

new tvr 400se bonnet

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Discussion

JVaughan

6,025 posts

282 months

Friday 27th February 2015
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Why cant they just use carbon mat ? Ok it wont have the strength of autoclave'd carbon, but wouldnt it be stronger than traditional glass fibre?

Cost dependent, I would be up for a "spare"

DonkeyApple

54,918 posts

168 months

Friday 27th February 2015
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TA14 said:
Waynester said:
beacon said:
Waynester said:
Shame if the carbon is a no go.. My SEAC body is part carbon fibre from the factory, the bonnet isn't though. I would have been interested.
I didn't know that, so the bonnet and boot were not afforded the same manufacturing material, kinda defeats the object a bit but I imagine the overall saving on weight was considerable.
sonar
It seems much of the tub is carbon, but the bonnet, boot & SEAC spoiler 'looks' to be fibre glass. As I understand, there were 2 or 3 SEACs that TVR experimented with carbon fibre along with the early aramid cars. After which as we all know..SEACs were then mainly GRP.

I would love to swap the remaining parts to CF as my above post...but getting moulds & CF parts made wouldn't be cheap. frown
Choice of materials is always difficult with so many different things to consider. In the end TVR went for Kevlar, hence the AC for aramid construction. Kevlar is strong and light compared to glass but carbon is even better. TVR didn't ever use carbon really (there was a token use as stiffeners in the T400/Typhon and the decoration in the Griff roof panel) and what you see in the SE AC is the Kevlar matting, occasionally.

Despite the strength and weight benefits is was the lack of stiffness that killed the AC. This problem caused ripples in the body/paint due to trying to make the panels thin.

http://www.christinedemerchant.com/carbon-kevlar-g...
The whole shell on my car is CF. It's wafer thin sheeting bonded around the chasis and packed with honeycomb in key places to create a basic safety cell.

It's amazing how light it is as I can lift the entire front section of the car myself with ease.

I'd also heard that the early use of Kevlar weave led to warping over time.

potato muncher

613 posts

214 months

Saturday 28th February 2015
quotequote all
TA14 said:
Choice of materials is always difficult with so many different things to consider. In the end TVR went for Kevlar, hence the AC for aramid construction. Kevlar is strong and light compared to glass but carbon is even better. TVR didn't ever use carbon really (there was a token use as stiffeners in the T400/Typhon and the decoration in the Griff roof panel) and what you see in the SE AC is the Kevlar matting, occasionally.

Despite the strength and weight benefits is was the lack of stiffness that killed the AC. This problem caused ripples in the body/paint due to trying to make the panels thin.

http://www.christinedemerchant.com/carbon-kevlar-g...
TVR did use carbon fibre, the whole body and floor panels on the T400 and Typhon are carbon fibre as DonkeyApple says.
I have never heard of any carbon used on Wedges. Some Seac's were made out of Kevlar. Will check on Monday and post if different.

DonkeyApple

54,918 posts

168 months

Saturday 28th February 2015
quotequote all
potato muncher said:
TVR did use carbon fibre, the whole body and floor panels on the T400 and Typhon are carbon fibre as DonkeyApple says.
I have never heard of any carbon used on Wedges. Some Seac's were made out of Kevlar. Will check on Monday and post if different.
I might be wrong but I think TVR cut their teeth with CF laminated honeycomb in the Speed 12 first and what they learnt from that project took them on to the TuscanR racing project.

Waynester

6,324 posts

249 months

Saturday 28th February 2015
quotequote all
potato muncher said:
TA14 said:
Choice of materials is always difficult with so many different things to consider. In the end TVR went for Kevlar, hence the AC for aramid construction. Kevlar is strong and light compared to glass but carbon is even better. TVR didn't ever use carbon really (there was a token use as stiffeners in the T400/Typhon and the decoration in the Griff roof panel) and what you see in the SE AC is the Kevlar matting, occasionally.

Despite the strength and weight benefits is was the lack of stiffness that killed the AC. This problem caused ripples in the body/paint due to trying to make the panels thin.

http://www.christinedemerchant.com/carbon-kevlar-g...
TVR did use carbon fibre, the whole body and floor panels on the T400 and Typhon are carbon fibre as DonkeyApple says.
I have never heard of any carbon used on Wedges. Some Seac's were made out of Kevlar. Will check on Monday and post if different.
http://www.theseacpages.co.uk/Production.aspx


This was taken from The SEAC Pages. I was always told my SEAC was one of the 4 or 5, so I would be interested to know if true..& if someone with greater knowledge has any other information on this? smile




The Hatter

988 posts

169 months

Saturday 28th February 2015
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The bonnet of my 86/87 SEAC is a kevlar moulding with carbon fibre reinforcements bonded to it:





It is incredibly light but the surface finish isn't great. Chris Schirle told me that they had several bonnets made in kevlar but then reverted to GRP.