The Miles M. 20 is now fully framed and ready to cover.
Building the Miles M. 20 wing
by Paul Kohlmann
Most aircraft are designed with wing dihedral and
the M. 20 is no exception. Dihedral is the upward
tilt of the wing as measured from the root to the
tip. It improves the stability of the full-scale and
model aircraft by resisting rolling and sideslip forces.
Anhedral is the opposite of dihedral. It is used to
counter a configuration that is “too stable,” such as a
high-wing cargo airplane or a jet with a lot of wing
Most balsa model plans call for the right and left
wings to be built separately on a flat surface with
the ribs standing up straight. This works well, but if
After building the tail and the fuselage in previous articles, it’s time to move on to the wing. That means that we are officially in the homestretch of framing up
the 45-inch Miles M. 20 that was started in the July issue of
We’ll use the M. 20 as a guinea pig to demonstrate some
building techniques that generally apply to balsa building.
Builders looking for a step-by-step construction guide for
the M. 20 can find that in the build log on RCGroups—see the
“Sources” at the end of this article.
The M. 20’s wing is one of the things that makes this aircraft a
perfect subject for RC. The wing has a simple shape, it is wide
with plenty of area, and has a modest amount of dihedral.
Photos by the author
29 Model Aviation SEP TEMBER 2015 www.ModelAviation.com