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!

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 temperature.
Why is the central part of your mould black? did you use the same resin? What material did you use for the stringers? What is the layup of your mould, especially underneath the stringers?