Working on Inventor Drawings
Dimensions
The balsa wood for the airplane needs to be
carefully selected. Earlier, the portions of the
airplane that require extra strength due to flight
stresses were mentioned: The main spars (leading
edge and trailing edge) for the inner panel of
the wing and the wing posts that come down from
the spars should be the hardest you can find.
The size of those spars are 1/16-inch square
sticks. The sticks are sold in 36-inch lengths.
The weight of each 36-inch stick should be about
0.7 grams. The second strong piece of wood is
the fuselage motor stick. Its cross-section is 1/8
inch by 3/8 inch. A 36-inch length should weigh
between 4.5 and 5.0 grams.
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