Sunday, August 31, 2025

Centuri Skylab Build, #KB-4, Part 25, New Turbine Exhaust Tube


After lots of handling during the build, the exhaust tube broke loose.
There wasn't much glue holding it against the motor mount tube.
(The picture on the left shows the first black tube.) 
I cut a new one and filled the seam with CWF. It was sprayed black off the model.



For a better, wider glue bond against the inside motor tube - 

The side of the lug was pushed in to flatten and widen the gluing surface. It took a little coaxing with a fingernail to put a curve in the flattened side.
The lug was sprayed black off the model. The inside end was masked off for better glue adhesion.

Wood glue was used to set the lug against the tube on the inside.
I wadded up a paper towel to put pressure on the lug and position it at the right angle.

After the inside glue dried,
CA glue was applied with a toothpick leaving a hard, clear fillet.

TIP: Cut off just the very tip off the toothpick and round the new end with sandpaper. The wider, round tip will hold more glue for the transfer onto the model.

This second try had a cleaner color separation with it being painted black before gluing into the rear centering ring hole.

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