A folding control surface assembly includes a torsion shaft, a base, and a
control surface hingedly attached to the base via the torsion shaft, such
that the torsion shaft biases the control surface toward an unfolded
configuration with respect to the base. A vehicle includes a body and at
least one folding control surface assembly. The at least one folding
control surface assembly includes a torsion shaft, a base attached to the
body, and a control surface hingedly attached to the base via the torsion
shaft, such that the torsion shaft biases the control surface toward an
unfolded configuration with respect to the base.