128 MODEL AVIATION
AMA Plans Service Showcase
Tired of flat, straight wings?
This design will liven up those
building and flying sessions
Der Fledermaus
DESIGNER/BUILDER Paul F. Denson
dreamed about building a model with dihedral
in the wingtips. He liked the configuration of
the Jodel series and the Thorpe designs, but
he didn’t want a flat center-section. Paul
added a bit of dihedral to the wing centersection
and designed Der Fledermaus, which
was featured in the May 1990 MA.
Paul’s creation has a flat-bottom
airfoil, which makes building an accurate
wing a snap. The rest of the airplane is built
mostly from stock sheet balsa.
Designed around .20- to .25-size engines
and a four-channel radio, this 55-inchwingspan,
low-wing design is stable enough
to fly with only three channels if desired (no
ailerons). This is yet another model that could
easily be converted to electric power.
Do you want to build Der Fledermaus for
yourself? Its full-size plans code is 652C,
available from the AMA Plans Service. See
the advertisement on page 215. You can view
or download the original article from the MA
Digital Archives. MA
07sig4.QXD 5/23/07 9:52 AM Page 128
Edition: Model Aviation - 2007/07
Page Numbers: 128
