genius war girl

Chapter 78 Lavochkin and the Spitfire

The two fighters of the Soviet 5.3 are the famous Lavochkin fighters, La-7B-20 and La-11.

The La-7 was originally known as the "1944 Standard" La-5FN, an aircraft that differed significantly from its predecessors.The aircraft wing spar used metal to replace the previous wooden parts, improved the sealing performance of the fuselage power system, equipped with 3 UB-20 cannons, moved the position of the oil cooler from the bottom of the engine fairing to the rear fuselage, and moved the The supercharger was moved from the engine cowling to the midsection leading edge of the wing.The aircraft's take-off weight has been reduced by 121 pounds and its aerodynamic performance has been improved.

通过这一系列改进，原型机展现出优异的性能：低空极速373MPH、10500英尺时419MPH、20000英尺时425MPH。不久拉-7定型，1944年春生产型拉-7（拉沃契金设计局内部编号45型）开始在高尔基的第21号工厂开始生产，1944年9月第381号工厂和第99号工厂也开始生产拉-7。由于计划中将要装备拉-7的B-20机炮出现了问题，所以这些飞机只装备了2门20毫米史瓦克机炮。

直到1945年1月，拉-7的量产型才如愿以偿的装上三门B-20机炮。B-20机炮使用和史瓦克机炮相同的20x99mmR弹，这种机炮单论性能表现的话跟ShVAK几乎完全一样，而其优势在于超级轻的重量——作为一种20mm口径的机炮仅有25kg重绝对是轻到丧心病狂。

The firepower of the three 20mmB-20s is very strong, and it has already thrown off the BF109 and FW190 fighters without pods.Its arrangement on the central axis of the fuselage also ensures the accuracy of shooting.

After the war, Lavochkin made some modifications on La-7 again. La-9 basically kept the aerodynamic layout and appearance characteristics of La-7. The main improvement is the use of all-metal structure and laminar airfoil. At the same time Changed the weapons to four NS-23 cannons.

NS-23的射速和炮弹初速虽然不如B-20机炮，但其使用的23X115mm炮弹的威力可不是20X99mmR弹能比的。

The La-11 is a modification of the La-9, which is mainly used to escort bombers.The basic structure of the La-11 is the same as that of the La-9, except for an NS-23 cannon and increased fuel reserves.

由于火力的下降和燃料重量的增加，拉-11的权重也从拉-9的5.7跌倒了5.3，和拉-7B-20同级。

"The difference between the basic performance of the La-7B-20 and the La-11 is not too great. Within 3000 meters, the two fighters are superior in terms of speed, climb, roll, and gyration. The disadvantage is that the performance above 4000 meters is not good. , and then there is the problem of locking the rudder of light fighters at high speed."

After hearing Otowa's words, Mika just smiled.

"The height of this competition is not high, Otowa-san, it's not a problem at all."

"Well, so these two fighters are actually good choices." Yin Yu nodded, and then continued: "But let's take a look at the remaining fighters first."

The British 5.3 is Spitfire LFMK.IX, Spitfire FMK.XIVE, Spitfire FRMK.XIVE, and Seafire MK.XVII.

In order to deal with the Fw190, a model based on the "Spitfire" MkVIII was put on the agenda.This type of "Spitfire" strengthens the fuselage on the basis of MkVIII, installs a retractable tail wheel, and uses a Merlin 60 series engine equipped with a two-stage two-speed supercharger, which can output much more at high altitudes motivation.

Among these improvements, the modification of the airframe is the most important, but it is time-consuming.The plan to improve the airframe eventually developed an excellent fighter, but in order to meet the urgent demand for new fighters, the Merlin 60 engine was first "temporarily" installed on the Mk.V airframe.To accommodate the charge air cooling of the superchargers, two radiators are mounted symmetrically under the wings.As a result, the Mk.IX, which was "temporarily dealt with" like the Mk.V, achieved great success. A total of 5 were manufactured, making it the second most produced model in the "Spitfire" series.

The Spitfire LFMK.IX is a low-altitude Spitfire, using a Merlin 66 engine with an output of 1300 horsepower, but it can reach an astonishing 2000 horsepower after turning on the afterburner.

Although the power of the Merlin engine has been continuously improved, in order to meet the needs, the larger "Griffon" (Griffon) engine was developed.Griffin uses the same 12-cylinder V-shaped structure as Merlin, but increases the displacement of "Merlin" from 27 liters to 36 liters.In addition, the rotation direction of this engine is also opposite to that of the Merlin, and the diametrically opposite deflection direction during takeoff surprised many pilots.

Spitfire MK.XIVE is the model that uses the Griffin engine. At the same time, it is replaced with a modern bubble cockpit. Its speed is much faster than the Spitfire MK.IX with Merlin engine, but its flexibility is reduced.The Spitfire FRMK.XIVE has shortened the wings on the original version, the purpose is to enhance the roll performance, but the price is the horizontal maneuverability.

The Seafire is the naval version of the Spitfire fighter. In order to meet the needs of being used as a carrier-based fighter, the Seafire has added a landing hook, equipment for aircraft catapults and folding wings on the basis of the Spitfire.The Seafire fighter is not a very ideal carrier-based fighter, mainly because there are certain difficulties when the Seafire lands on an aircraft carrier and the range is relatively short.Despite these shortcomings, the aircraft can still provide air cover for the fleet very effectively due to its fast climb and good maneuverability.

Seafire MK.XVII also uses the Griffin engine, as well as the bubble cockpit.However, the Griffin-VI it uses is not good at high altitudes, and its speed is not as good as the fire-breathing MK.XIVE.

In terms of firepower, the four Spitfires are powered by two 20mm Hispano MK.II cannons.Except for the Seafire with four 7.7mm Browning machine guns, the other three Spitfires have two 12.7mmM2.

Yin Yu quickly swept over the four fighters, and at the same time had a bottom line against the four fighters.

"The low-altitude maneuverability of the four Spitfires is good, and they are all suitable for this game. The low-altitude performance of the low-altitude jet 9 is strong, and the maneuverability is very good. Although the maneuverability of the jet 14 is worse, the speed is much faster. The cut 14 special The roll performance after transformation should not be underestimated. The maneuverability of the Haihuo 17 is between that of the Low-Jet 9 and the Jet-14. Although the speed is not fast, it is equipped with a landing hook that can land on an aircraft carrier."

(End of this chapter)