Thrustline Arapahoe C, Part 6, Fin Planning

The root edge of the fins runs down the curve of the tail cone.
An easy way to get a start on the curve is to simply trace around the tail cone on some card stock.
Hold the tail cone and body tube still. Trace while holding the pencil perfectly vertical.
The inset picture on the right shows the rough tracing.

Here's the cutout fin pattern set against the tube and tail cone.
The fin is two pieces, notice the grain direction.
An exotic, flowing shape like this requires the different grain directions.






The Monarch kit fins have enough excess balsa you should be able to cut out most of the three fin halves.
Pay special attention to the grain direction before tracing.

Here's how the fin cuts fit on the existing Monarch balsa sheet.