Draw the point
01
The wing form of short and medium-distance pigeons – narrow, short, curved
In the middle and short distance races, the pigeons have to return over thousands of miles, generally 300 km takes about 4 hours, the fast one can break through 3 and a half hours, and the fast one 500 km can report in about 6 hours.
On the way back, do not eat water, to fan the wings at a high frequency, from the analysis of aerodynamic principles, the pigeons must increase the frequency and speed of the wings to increase the speed of flight. More importantly, under conditions where the same force is paid, only the wings that generate maximum power and least resistance can produce the highest flight speed.
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Because of the number of flappings in the pigeon's flight, the coefficient of friction between the speed and the air? Is it proportional to the morphology and structure of the feathers and the resistance and friction coefficient of the air? Inversely proportional. Therefore, the first three large pigeons in the middle and short courses must not be too long or too wide.
However, there is no strict standard scale for length, width, and curvature. Because each pigeon is different in size and muscle strength, only one relative conclusion can be drawn:
Long: "Uneven tail black line";
Width: "not less than the width of the secondary feather";
Curved: arranged in an arc, in an approximate "S" shape, the front is slightly streamlined, the tip of the head, for the top product. The famous Jensen bloodline has this typical characteristic of the feather structure, and for example, Limbor, Twilight Gate and other medium and short distance speed pigeons, most of them have such characteristics.
02
The wing shape of the long-distance pigeons is long, curved, round
Long distance racing refers to the 700 to 1000 km class, the flight time of the pigeons under normal climatic conditions is one day to one and a half days, so this type of pigeon, the wings should be adapted to a longer period of continuous flight.
The basic morphological requirements for the wings are: the entire wing is slightly wider, longer and larger than the middle and short distance pigeons, especially the main feathers cannot be narrowed and shortened like the medium and short race pigeons, when the wings are pulled out, the first four main feathers have a larger angle, the end of the feathers is slightly rounded, and the seventh to ninth is arranged in an arc.
Such a main wing feather form, flight buoyancy, small resistance, do not have to speed up the fan frequency can maintain a high speed, while saving physical strength, effectively reduce energy consumption, just to meet the requirements of long-distance flight.
The requirement for the secondary feathers of long-distance racing pigeons should be that the spokes should have a certain degree of curvature, be tightly arranged, and the base feathers should have good hardness, perfect coverage, no air leakage, so that the feather structure will flow backwards with the air flow of the fight and produce upward buoyancy and forward thrust.
The main bottom of the long-distance pigeon should not be too long (tailed), because if it is too long, the fan frequency is low and there is no speed, and at the same time, it cannot be too short (not as short as the black part of the tail end), the fan frequency is high, the energy consumption is too fast, and there is no endurance.