Cake Frosting Applicator for Applying Resin/Mill Fiber Mix Warning

Cake Decorator can ruin your airplane

0

I recently heard a great suggestion for applying the resin/mill fiber mixture to the rib and spar tops of wings, stabilizers, rudders, etc. The idea is to get a cake decorating tool or a plastic ziplock bag with one corner cut off and squeeze the mixture out just as a baker does when applying frosting to a cake.

This sounded like a great idea until I almost ruined one of my elevators using this technique. The problem when using a cake decorator to dispense resin/millfiber mixture is that the resin tends to get squeezed out first (with some millfiber) giving you a wetter than desired mixture (resin rich), then later in the operation you start to get a much dryer than desired mixture.

Advertisement

When this happened to me I closed my elevators and began to notice that the second elevator was not closing all the way as it had done in the practice (dry) run. The thicker/dryer millfiber mix was holding the lower skin a 1/8″ above the ribs and spar.

I was able to salvage the job by using some very serious clamping along the rib and spar locations. It all worked out in the end, but it was a real scare there for a while rushing to get it all clamped before it cured.

This method of application should work great for a resin/q-cell (cabosil) mixture, but in my opinion it should not be used with millfiber.

Advertisement
Previous articleDesign and Construction of Embedded Antennas for Glasairs
Next articleGetting the Wheels All the Way Up Every Time