The tail surfaces are 3/8-inch thick. Two 3/16-
inch foam sheets are glued together and then
sanded to shape.
by Laddie Mikulasko
In 1914, Claudius Dornier established a company called Dornier Flugzeugwerke. Throughout its long history, the company produced many innovative designs for the civil
and military markets. Until the beginning of World War II,
Dornier concentrated on producing seaplanes. The most
successful design was a two-engine Do J Wal.
The Wal was a popular airplane and approximately 300 were
produced. European and South American airline companies
used a large number of Wals. In addition to the two-engine
Wals, Dornier also built 19 four-engine R 4 Super-Wals that
could carry up to 19 passengers.
My model is built from foam boards that I purchased at
the dollar store. The model is powered by four Turnigy 3536/9
motors. The front motors are powered by a 3S 3,000 mAh
battery turning the 9 x 6 propellers at 15 amps each.
The rear motors have a 3S 3,000 mAh battery and are
turning the 9 x 4. 5 propellers at 12 amps each. The model
could be flown using one 3S 6,000 mAh battery, but it needs
added weight for balancing, so I used two batteries.
I redrew the plans to use foam instead of balsa. I made the
wing in three sections for easier assembly and disassembly.
Building the Model
The first step is to remove the paper from the 3/16-inch-
thick foam boards. Save the paper because you will need it for
Because the fuselage sides and the horizontal tail surfaces
are 3/8-inch thick, the sheets must be glued together on top of
each other to achieve the proper thickness, then glued end-to-end to make two 70-inch-long strips. Spray contact cement
glue onto one side of each strip. Glue the strips to each other,
but make sure that the dividing lines between the sheets are
approximately 2 inches apart.
Build the tail surfaces first. The fin and the rudder are made
by gluing three
sheets of foam
together to achieve
Cut out the fin
( 20) and the
rudder ( 22) from
this sheet. Glue
the hinge spar ( 21)
to the fin ( 20) and
the LE spar ( 23)
to the rudder ( 22).
Cut out the
stabilizer ( 24)
and the elevator
surfaces ( 26) from
foam sheet. Glue
the hinge spar ( 25)
to the stabilizer
( 24), and the
LE spar ( 27) to the
47 Model Aviation APRIL 2014