The tail boom is very easy
to make. The boom is cut from 1/8" sheet and should be 1/4" wide tapered
down to 1/8" wide. You can make the boom from a piece of 1/8" x 3/8" x
10" long balsa. First mark on the left side 1/8" down, and then on the
right side 1/4" down. Then draw a line diagonally across the wood to join
the points with a pen (see photo below).
Use a straightedge or a ruler
and cut along the line to cut the wood in half.
And here are the two booms
which you just created.