One for Warren - Front Clip on my Elan


One for Warren - Front Clip on my Elan
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Steve Broad
Steve Broad
Steve Broad
posted 6 Years Ago HOT
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Making a prepreg carbon front clip for my Lotus Elan. So far so good.



Mould with the reinforcement that caused the problem. I bagged the whole thing. This resulted in a differential pressure between the inner surface and the outer skin under the reinforcement which resulted in the mould sinking under the pressure!
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Warren (Staff)
Warren (Staff)
Warren (Staff)
posted 6 Years Ago HOT
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How is the trimming and repair work coming on?  Do you have a more or less final weight yet?


Warren Penalver
Easy Composites / Carbon Mods - Technical Support Assistant
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Steve Broad
Steve Broad
Steve Broad
posted 6 Years Ago
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Warren (Staff) - 4/23/2018 8:35:09 AM
How is the trimming and repair work coming on?  Do you have a more or less final weight yet?

Hi

I have been adding foam core to splitter, again struggling with achieving a vacuum. However, that should be cured today so I will be able to turn the bonnet over and get sanding. I will advise on final weight.
If the repair work is a failure, I will repair the bonnet section of the mould and make a new top and glue that on.
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One for Warren - Front Clip on my Elan
Steve Broad - 6 Years Ago
     Sorry to hear and see that. But this would have happened with any other bagging technique. It looks like your mould wasn't tempered high enough, or your mould resin just isn't suitable for the...
oekmont - 6 Years Ago
     It's an interesting mould, but in my opinion that ribbing structure is totally unnecessary as well. That mould would be plenty stiff just from those parting barriers. Anyway, I agree with oekmont -....
Hanaldo - 6 Years Ago
     Correct resin, gel and fibreglass. The central part is black as I ran out of fibreglass :-) Agreed, the ribs were not necessary, hindsight is a wonderful thing :-) Total of 8 layers with 6 under....
Steve Broad - 6 Years Ago
     Thanks for the pictures. I see what you mean by the ribbing. It is a shame as the rest of it looks really good. It is a shame there was the void in the ribs but as we discussed you probably don't nee...
Warren (Staff) - 6 Years Ago
     As long as you didn't have bridging, it doesn't make a difference if you bagged the whole mould or just the inside. The air pushes against the outside mold with the mold with the same pressure, with....
oekmont - 6 Years Ago
             Yes, I know the air would be atmospheric, I was working on relative pressures. otherwise the 14 would be 0. With a vacuum within the ribs (I would be surprised if they were airtight, the combination....
Steve Broad - 6 Years Ago
     How is the trimming and repair work coming on? Do you have a more or less final weight yet?
Warren (Staff) - 6 Years Ago
             Hi I have been adding foam core to splitter, again struggling with achieving a vacuum. However, that should be cured today so I will be able to turn the bonnet over and get sanding. I will advise on...
Steve Broad - 6 Years Ago
     Let us know how you get on. Hopefully you will be able to sort it.
Warren (Staff) - 6 Years Ago
             Hopefully :-) Any issues with using your repair resin, as this will speed up the repair process? Steve
Steve Broad - 6 Years Ago
                 Just spoken to Rich who confirmed that there are no problems with using this resin.
Steve Broad - 6 Years Ago
     Just remember to mix small batches as the pot life in this weather is likely to be sub 10 minutes, so small batches at a time and you will have around a 2 hour cure time on the resin.
Warren (Staff) - 6 Years Ago
             Cheers, Warren.
Steve Broad - 6 Years Ago

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