Thursday, March 10, 2016

Centuri Astro 1, Build, Part 4, Nose Cone and Fin Prep

Take an extra moment before screwing in the screw eye.
Mark the center with a pencil. Rotate the nose cone and chances are that first mark won't be perfectly centered. Mark the center again.

TIP: When screwing in the screw eye, go slow.
Screw a full turn, stop and check the alignment. Be sure it is going in straight. If you catch a crooked insertion early you can correct it before turning it in all the way.



TIP: The nose cone is a over 5" long and very pointy. In past experience, pointed balsa nose cones seem to get hit and blunted.
I'm building two kits as once.
The nose cone on the left is the before, on the right is the second cone rounded off. The later Centuri Astro I kits had plastic nose cones with rounded tips.
TIP: The balsa fin stock was slightly different between the two kits.
To match the density and grain the fins were grouped and marked on the root edges.

With this unusual fin shape it's easy to round the root edges by mistake. That was a problem with the Asto I fins. Many first time builders glued them on wrong, looking more like the Estes Alpha. I found myself almost rounding the wrong (leading) edges.
Marking the root edge tips made me stop, reposition and sand the correct sides.

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