Yesterday I showed some pictures about why I have chosen to put the carbon fiber on the inside of the Divinycell instead of the outside.
Below are photos of tests I made about 15 years ago. Those tests convinced that placing carbon fibers on the inside of a sandwich construction makes it way more stronger than to have them on the outside, regarding impacts.
Clearly the difference to impact impact is like day and night. It is no more difficult to or not much more difficult to put the carbon on the inside than on the outside, but it so much more safe. My advice to builders of small ocean going cruisers: Use carbon fibers on the inside to get a strong safe boat.
To be continued…