Saturday, August 11, 2012

Estes V2 Build Part 12 Fin Rudders




Using the drawing print, the rudders were marked with pencil



Use a new blade and cut off the rudders.

Look close and you can see the number "2" on the inside edge of the rudder.
All four rudders were fit for their fins.

I squared up the sides and sanded down the inside rudder edges just a bit to bring it just inside the border of the outside fin lines.

The inside rudder edges had the sides sanded off to about the width of copy paper.
A strip of paper will be glued to the edge to open up the gap when the rudder is glued on after filling.

Here the rudder is held to show the thin gap when it is glued in place later on.

The gap is only as wide as the thickness of a strip of paper.

I won't be sanding the fins to a scale airfoil shape.
Trailing fins with a thin airfoil don't last long after a hard landing.
Building a sport scale model is a compromise. On this one I wanted to make it look more "scale" but had to work around the larger, more stable design of the fins.

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