Note - Burt Rutan has disproved hard-shelling for years, and does not recommend it. Note - Nat Puffer recommends against hardshelling on his Cozy designs.
Example of problems from Hard-Shelling: From: michael.poll...@mci.com Subject: Loud Pop??? I am in a group of 4 people who built this Velocity and I hold the repairman cert. We followed the plans exactly except for the hardshelling of the canard. We thought that since the recommendation came from another builder, which showed up in the newsletter, it was an acceptable method. I guess one should only stick to the plans and do ONLY what is spelled out in the plans. The problem we have experienced is localized in only one area that is already repaired, but it could happen to others who have done what we have done. I WILL NOT be doing any hard-shelling and will recommend against it. - Michael Pollock - Flying Velocity N173DT Larry A Capps Naperville, IL -----Original Message----- The term Hard-Shelling (circa 1980) - is the practice of covering foam with micro slurry, letting it cure, sanding it and then applying a fiberglass layup over the top. (not recommended) - Larry Capps +++++++++++++++++++++++++++++++++++++++++++++++++++++++ I would however like to hear the reasoning of those that thought "hard-shelling" was an unacceptable process. Some of my glass work is 10+ years old now and has 40 hours in the air with no noticable problems. Larry Flesner
