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| Colin Cooke |
The Yun-20 refueling machine was photographed. This time it’s not a hard tube refueling. 4000 liters per minute is nothing else_Hose
Translated by google
2020-07-28
With the gradual improvement of my country's air and space military power system and the increase in the number of fighter jets, the corresponding logistics support aircraft system must also be more complete to ensure the long-lasting combat effectiveness of the Air Force. Recently, some netizens photographed the Yun-20 tanker in training, but it doesn't seem to be the Yun-20 tanker that appeared on CCTV before.
First of all, from the photo we can see that this is definitely a large Yun-20 aircraft, and there are two large pods mounted on both sides of the wings of the aircraft. At first glance, it looks like the Russian IL-78 refueling. The machines are very similar, but the differences are not difficult to find. An obvious feature of Russia’s IL-78 tanker is that there is a refueling pod on the left side of the tank. There is no Yun-20, and the color of the belly of the Yun-20 is obviously different from elsewhere. Netizens think this is a common hard tube fueler before, but it is not for us to discuss.
Aerial refueling first appeared in the 1930s when Sir Cobbhan in the United Kingdom invented to cross the English Channel. The earliest refueling machines used hose refueling. This refueling technology was most obvious during World War II and the US-Soviet Cold War. The Russian Il-78 refueling machine and the U.S. KC-10A refueling machine were typical hose refueling. Among them, the U.S. Air Force’s tankers reached more than 600 at most. However, hose refueling also has obvious shortcomings. When refueling in the air, tankers and fighters are easily disturbed by the airflow, resulting in slower refueling efficiency and even the danger of "prolapse". At this time, hard tube refueling technology appeared.
The first time the Chinese Air Force adopted the hard tube refueling technology on the Yun-20 tanker. The biggest advantage of hard tube refueling is the stable connection and the refueling rate has been greatly improved. The air delivery rate of the Y-20 is about 4000-6000 liters per minute, which directly increases the combat radius of our fighters by 30%, and is not afraid of "short legs" when facing cross-regional operations. Of course, in addition to carrier-based aircraft, fighters, bombers, etc., it can basically support air refueling.
However, due to the current changes and needs in the composition of air forces in various countries, a refueling method that combines hoses and hard pipes is a hybrid tanker. However, there are two variants of hybrid refueling currently appearing: one is to install the hard tube telescopic sleeve on the tail, and mount the fuel tank under the two wings of the tanker to form a three-point hybrid tanker. The other is to replace the refueling nozzle of the end of the hard pipe telescopic sleeve with a cone pipe of a hose, which also forms a hybrid fuel dispenser with a combination of soft and hard. This kind of hybrid refueling method is to solve the problem of hard tube tanker refueling plug-type refueling aircraft, but it can also be temporarily modified to change the hard tube tanker to two hybrid or one hybrid and one hard tube. Come on the battlefield, no matter what type of fueled aircraft can be managed.
At present, the air refueling aircraft supported by the Chinese Air Force are basically hose refueling methods, but it is certain that this Yun-20 tanker did not adopt the Russian-made IL-78 tanker refueling method, but chose hybrid refueling. However, there is an obvious shortcoming of using a pod for refueling, that is, it is not as fast as the fuel tank in the engine. Although we see that there are pods on the wings of Yun-20 in the picture, this is a modified hybrid refueling equipment. In this way, not only the modification of the Yun-20 is small, but also the speed of the combination of soft and hard is ensured, and the resistance of the tanker itself is also small. The innovative hybrid refueling of the Yun-20 can not only guarantee the air force hose refueling method, but also make the safety distance larger. This is a unique innovation and no longer need to be mocked by Western countries.
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