Aircraft You Design
By Greg Covey
23" Extruded Polystyrene (EPS) foam wing half has a 10" chord
that is light weight and can
Nasty Toes Aviation gives you the opportunity to design
custom remote control airplanes using pre-engineered parts.
You can mix and match the parts to make a wide selection of
The design of an airplane can meet the needs of a novice to
an experienced flyer. Just use the basic rules of flight,
and you could be flying a custom remote control airplane.
If you need help with an idea for a design, or not sure of
the basic rules of flight, check out their Links
section. For examples of how the parts come together, check
out the details of kits in the Planes section of their site, or the
For my project, I will be creating a simple 46" span biplane
using a GWS EPS-400C power system. By keeping my plane light,
I expect to be able to fly it indoors or around a small field
in slow circles.
easily be covered. The
fuselage is made from aircraft grade spruce stock that is light
foam wing halves are 23" in length and have a 10" Cord. They
use an Eppler 197 airfoil. Dihedral is pre-cut on one end of
each wing half. Depending on your design, you can take that
same wing and move the dihedral anywhere along the wing, or
eliminate it all together. I choose to simply glue two wing
fuselage 3/8" x 3/8" x 36" is made from aircraft-grade
spruce stock that is light but strong. You can just cut it to
length or leave it full length like I did. It fit my GWS EPS-400C(D)
power system perfectly.
I glued two sets of wing halves together with 5-minute epoxy.
I held the wing for correct dihedral during the first few minutes
until the epoxy set.
wing halves were glued together with 5-minute epoxy. The
struts are made of medium weight
sheet balsa wood from Vertical Stabilizers
cut my struts from several vertical Stabilizer pieces. The balsa quality is excellent!
I weighed the 4 stabilizer pieces before cutting at 1.5oz and
then after cutting at only 0.8oz. Using struts cut away from
the solid balsa stabs saved me 0.7oz in weight. The struts were
placed in position roughly based on the biplane in the X-planes
Grooves were cut into the top wing underside after first gluing
the struts in place
I glued the struts to the bottom wing, I set the top wing on
the struts and marked the spots to create some channels in the
foam. Both wings were then glued together.
tail pieces were first cut and then spray painted with Testors
Enamel. You can see the quality of the balsa pieces again here.
Instead of using hinges for the control surfaces I simply taped
them on one side and added a reverse side reinforcement at both
I simply taped the cut out control surfaces to the stabilizers.The
tail was glued in place
with 5-minute epoxy. The wing mounts are
designed to slide on the spruce fuselage
wing mounts are assembled from pre-cut pieces with CA and allow
the foam wing to attach to the fuselage via rubber bands. Additionally, they allow you to slide the
wing along the fuselage to alter the CG for best flying.
I mounted the servos just behind the aft wing mount to allow
a little room to slide the
wing, if needed. For my linkage, I used sleeved rod and "Z"
bends at both ends. The servo
arm was removed to attach the final end. The GWS EPS-400C(D) motor simply presses onto
the fuselage and is held by a screw through the plastic housing into the wood. I placed
3-cell Kokam 1500 pack up front to obtain what seemed like a
reasonable starting CG.
__My bipe was RTF at 22oz using a 4oz Kokam 3-cell 1500mAh pack
bipe was RTF at 22oz using a 4oz Kokam 3-cell 1500mAh pack. I measured 10.5amps at full
throttle using the 3-cell Lithium pack with a GWS 10x6 prop.
The CG seemed reasonable so let's see how it flies!
The resultant CG change provided spectacular flight!
initial flight testing proved that the CG was too far aft so
I added a 6" piece of balsa stock to extend the motor and battery
pack about 3" forward. The fuselage length was now 40".
Note that I initially slid the wing back but eventually the
wing mounts ran into the servos. I decided to extend the fuselage
length instead of re-mounting the servos and linkage. This happened
because my initial guess for the correct CG placing was wrong
and I am using a very light Lithium Polymer pack.
The simple biplane flew very stabile and slow. The
changes were simple
and the result was spectacular flying!
simple biplane can fly slow or inverted. It has sufficient power
to climb fast, if needed, and will be able to fly slow enough
for soft landings and indoor events.
Toes Aviation sells entire kits for you to assemble or it gives
you the opportunity to creatively put your own kits together
using basic pre-cut parts and simple instruction sheets. The
design does not have to be limited to just these pre-cut parts
but it offers a way to get started for people that don't have
the means of making their own foam wings or balsa and spruce
my project was kept simple, the result was a blast to fly! Further
enhancements can be made like adding a profile fuselage, scale
paint scheme, and landing gear. My goal here was to simply inspire
your own creative ideas.
noid was here