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fuselage section will result in undesirable flight characteristics. Note: the foam board listed above is
covered with an ultra thin plastic sheeting on both sides. While it is not necessary to remove it from the
entire board, it is necessary to remove it in all areas where components will be glued. It will be
necessary to remove all of the plastic if the delta is to be painted or otherwise covered. It is
recommended however, that the film be left on the board while measuring and cutting the parts. Using
a ball point pen or fine marking pen, make all cut lines on the side containing the manufacturers printing
and cut all pieces before removing the plastic film. Cutting the foam can be accomplished by various
methods. The prototypes were cut using a 48" aluminum carpenter's level which provided a squared
surface to slide the cutting blade on resulting in a reasonably squared edge. (FIG 3) This was
accomplished using a special blade from the food industry but a wide segmented "snap and cut" type
blade should work. Use the edge of the level to keep the blade squared at 90deg and use multiple
passes to make the cut. This is not expanded bead "cooler" type foam and cuts much easier by using
multiple shallow passes instead of trying to cut in one pass. Wire type foam cutters could be used but
would most likely make shaping the leading edges more difficult. Whatever method you choose to cut
the parts, please remember to work safely and take appropriate measures when working with sharp
blades or heat type cutters.
Tests were made with various chemicals to remove the remaining ink after removing the plastic film.
Denatured alcohol appears to work best to remove most of the ink without damaging the foam. If you
experiment with other chemicals, test on a piece of scrap foam first and of course be sure to use all
chemicals in a safe environment with adequate ventilation and free from ignition sources. It may not be
possible to remove all traces of the manufacturers markings but remember that this is a very
economical aircraft designed to be cheap, easy to build and incredibly fun to fly! This step is not
necessary if the plane is to be painted or otherwise covered. Models that were used in combat
competition were not covered, painted or modified at all. The markings were simply left as they were.
POWER/CONTROL SYSTEM
The War Wing can be flown with a wide range of power options. An Eflite Power 10 or equivilent motor
is a good choice that provides plenty of power and can be used with 3S 2200mah size lipo batteries . Use
an appropriate ESC capable of handling sustained full throttle flights when combat flying. Overall flying
weight of the prototype including a 2250mah 30C lipo battery was approximately 30 ounces. Any
suitable radio system may be used but must contain programming for elevon operation. Any standard
size servo will work fine for elevon control. Mini servos may work with good results but micro size servos
are not recommended. With this gear installed, the delta is capable of vertical launch from the ground.
We have set it on the tail and applied power for a true vertical takeoff. It will have plenty of speed and
excellent vertical performance using the suggested power and control systems. Using smaller and lighter
gear may slightly increase performance but is not necessary.
CONSTRUCTION
Wing Section:
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