One Sky Dog
Hi Eddy,toggle quoted messageShow quoted text
I am suggesting your developed method of repair is not appropriate for our aircraft.
A proper repair is to: Remove all paint and fairing to expose the damage. Remove damaged plies and core. Replace core with same type and density leave a few thousands of an inch low. Scarf glass plies 20:1 ratio. Replace repair layers one for one same direction with just enough resin, not floating. For 9 oz. cloth this will leave the visible weave of the top repair layer. Lightly scuff with fine scotch Brite to remove the shine and fill the weave and repair area with epoxy and micro balloon mix to fair in with the surrounding surface. Prime and paint.
Sailplanes are powered by “gravitational acceleration is approximately 9.8 m/s squared” weight is good unless you want to be a leaf. Drag is bad for sailplanes competition sailplanes carry a lot of water to increase their wing loading.
You are right high strength composites are made by precisely controlling the fiber volume and minimizing voids. Your laminate turns out with greater specific strength but gives up stiffness because it is thinner.
I am only worried because your repair methods are not the ones that the designers of our airplanes have approved. I can patch a hole in my Cessna with a beer can and it would probably be strong enough if I bonded it on instead of riveting, but it would not be the right way to do it according to the designer.
That is my point not designer approved, and I do know there are a thousand ways to make and repair composite stuff.
On Dec 5, 2018, at 12:10 PM, ΕΔΔΥ . overlordmustafa@... [Q-LIST] <Q-LIST@...> wrote: