Reference for finished painting
1. First draw a round hot air balloon canopy.
2. Then draw the outline of the hot air balloon’s flamethrower and rattan frame.
3. Draw the little girl standing in the frame and the pattern of the hot air balloon canopy.
4. Draw the canopy of another hot air balloon.
5. Draw the outline of the hot air balloon’s flamethrower and rattan frame using the same method as the second step.
6. Draw the bear standing in the frame and the pattern of the hot air balloon canopy.
7. The last step of coloring is completed.
The composition of a hot air balloon
A hot air balloon mainly consists of a huge air bag, a hanging basket for carrying people or items, and a space for heating the air.Gas burner. Although the airbag is thin and light, it has very good tensile properties. The hanging basket is made of rattan and can act as a buffer when landing. It is also equipped with flight instruments such as a thermometer, altimeter, and altitude gauge. The burner is the heart of the hot air balloon. When the main burner is ignited, the flame is 2-3 meters high; the ignition burner is the fire of the main burner and has been kept from being blown out by the wind. In addition, there are two sets of combustion systems on the hot air balloon to prevent malfunctions in the air.
The fuel usually used in hot air balloons is propane or liquefied petroleum gas. The gas cylinder is fixed in the hanging basket. A hot air balloon can carry 80 kilograms of liquid fuel.
The lifting and flying principles of hot air balloons
Although hot air balloons are also called aircraft, they cannot fly as freely as airplanes. The pilot can only control the balloon to change altitude. The rise and fall of a hot air balloon are related to the temperature inside the ball. When the air temperature inside the sphere is high, the buoyancy of the balloon increases, and the balloon rises; when the air temperature inside the sphere drops, the buoyancy generated by the sphere is less than its own weight, and the balloon begins to fall. The pilot controls the gas switch of the burner in the balloon basket, adjusts the temperature in the airbag at any time, and then controls the rise and fall of the balloon.
In addition, there are differences in wind speed and direction between high altitude and low altitude. Near the ground, affected by terrain and buildings, the wind direction will change and the wind speed will also decrease significantly. If you fly from the ground to the air in the morning or evening, there may be obvious changes in the wind direction every few meters or every ten meters, and some even the opposite direction. The pilot experiences different wind directions at various altitudes in the air, and then controls the balloon to rise or fall to the height of the wind direction he needs, and maintains flying at this wind level, so that he can achieve his purpose of flying to a certain target. Simply put, the balloon will fly wherever the wind blows; the balloon will fly as fast as the wind blows.
