12. Coating and painting

Wings and fuselage can be coated with paper, plastic foil (Monocot) or silk. The most common is paper. The best glue would be some diluted cold glue or colorless nitro-polish.
Firstly one would cut the paper using scissors to be a bit bigger the the part to be coasted. If one is coating wings or stabilizers, ribs have to be glued before the paper is being coated over the ribs. The paper has to stay straight, it must not get wrinkled and it has to be tight. The leftovers are cut with a razors or something similar.
After the glue is dry, the paper has to be tightened more, which is done by moisturizing the paper. It will tighten itself while drying. This can flex the wing, so we should always be careful with the wing and how we secure the wing.
After it's completely dry, the wing has to be protected form moisture with some polish two or three times. It is usually done by some colored polish for better visibility. Note that indoor models don't have to be polished.

11. Stability and center of gravity

As we all know every body has a certain weight because of Earth's gravity.
Now imagine that all the gravity which is pulling the body down is concentrated
is a single point, called center of gravity. Position of this point determines
the RC plane's stability. Usually the center of gravity is located between 1/2 and 2/3 of the wing's
width. Position of center of gravity is very important, because the RC model is rotating around the center of gravity. If it is not positioned correctly the plane will do all kinds of acrobatics.
Related to all of this, stability can be defined as a characteristic of a RC plane. It is its ability to return into the normal flight position.
There are more kinds of stability. In order for a RC plane to fly correctly it should have three kinds of stability:
1. pitch stability, prevents uncontrollable rotation around horizontal axis. It is accomplished
with the horizontal stabilizer.
2. Roll stability, prevents uncontrollable rolls, usually accomplished by the v-shape if the
wing
3. Yaw stability, prevents uncontrollable rotation around the vertical axis, accomplished with
the vertical stabilizer.

Air Hogs RC Dominator

While the Airhog plane is indisputably powerful with its simple pump-up engine and undeniably fun with its tremendous flying range and height, there has always been the small matter of trying to keep the plane from getting away and ending up lost in trees, neighbors yards, busy roads, or bodies of water. The planes are great but essentially uncontrollable and, unless you live in, say, the desert that can sometimes be a bit of an issue. Fortunately, the Dominator (love the name) features some basic controls, letting the pilot on the ground steer the craft up, down, left, and right (aka four way radio controlled plane). As RC planes go, it’s not the most easily guided but the rudimentary controls should be sufficient to guide the plane along a relatively safe path. The manufacturer claims it can fly up to 300 feet and the plane’s body is fairly solid though still made of Styrofoam and therefore inherently fragile. The cool black styling makes it look like a spy plane. The plane is controlled by varying motor speeds and features durable EPP foam and non-breakable flaps and rudders. Comes with an all-in-one controller and charger. Its low battery requirement makes it easy to carry and transport with you wherever you go.

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