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[信息] 直升机GS211

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发表于 2017-12-13 20:39:33 | 显示全部楼层 |阅读模式
GS211是GS106的更高级,更复杂和更宽的版本。主体包括铝制和航空钢制的主框架,或者其中的一些部分,受到高机械应力,而且还采用了最新一代的超轻型塑料,热塑性板和碳纤维。
ASL IGE最大可达250米(16000英尺)。它配备了两个电机,而不是一个,由数字控制器管理,从多个角度使飞机特别高效。这个项目是一个真正创新的新型BOOSTER系统的新概念,由两个风扇组成,靠近尾部的尾部,具有独特的特性。
GS211最多可搭载9名乘客和两名飞行员,或十名乘客和一名飞行员,但是,由于该机采用了特定的研究,旨在为多功能作用和体积的飞行器内部的分布,索诺为static受到许多不同的组合可以得到以提高GS211商业版的便利性。例如EMS版本这架直升机是专为空中救援,其稳定性和高速能力。
它已被设计成三个主要方面的帐户。
GS211的外形非常平滑无锋利,前方高效地在空中,没有在前面形成任何空中骚扰。转子盘非常光滑,形成转子的形状。这个问题是由于打到机身顶部是非常困难的。机身的位于转子下方的那部分事实上在被动拖曳方面相对于转子下洗空气流。

直升机GS211

直升机GS211


直升机GS211

直升机GS211


直升机GS211

直升机GS211


 楼主| 发表于 2017-12-13 20:40:28 | 显示全部楼层


GS211


The GS211 is a more advanced, complex and wider version of the GS106. The main body, as well as all previous projects is built with a combination of different materials, including aluminum and aeronautic steel for the main frame, or some sections of it, subjected to a high mechanical stress, but also employing the latest generation of ultralight plastics, thermo-plastic panels and carbonium fibers.
This helicopter as well as the GS106 is capable to reach 250 kts maximum cruise speed and it can fly up to about 5500 meters (16000 ft) ASL IGE. It's equipped with two motors rather powerful managed by a digital controller, which distribute the power on each single engine according to the flight regime, making this aircraft particularly efficient from many point of view, since as we'll see along this chapter the idea of this project is to introduce a very new concept for a new type of BOOSTER system truly innovative, consisting of two fans placed close to the base of the trunk of the tail, having a unique characteristics.
GS211 can carry up to nine passengers and two pilots, or ten passengers and a pilot, however, many different combination can be obtained since the aircraft is designed for multipurpose role and the distribution of volumes inside the aircraft, have been subject by a specific study in order to improve the convenience of the commercial version of GS211. The EMS version for example can carry up to two stretchers simultaneously inside the cabin. This helicopter is designed for air rescue missions thanks to both, its stability and the high speed capability.
The fuselage offer a very low aerodynamic drag, it has been designed taking into account all the three main side where drag has a big impact on its surface.
GS211's profile is very smooth and sharp-less, the front side penetrates efficiently in the air, without forming any important aerodynamic disturbance on the front area due to the incoming air flow. Both side as well as the shape below the rotor disks is very smooth, in order to reducing top-fuselage drag caused by the surface placed under the main rotors, which usually form severe turbolences increasing fuselage drag, then reducing rotor efficiency. This problem have a very big impact on helicopter's performance since the drag forming over the top surface of the fuselage, reducing the downwash action, because severe turbulence forms always around the top fuselage area, always rather inconvenient for the flight, particularly while in hover flight, that portion of the fuselage standing below the rotor produces indeed a passive drag respect to the rotor down-wash air flow.

GS211 is provided with a full IFR double navigation system, however the GS211EMS has instead just a single panel, since the space of the second pilot has been adapted for one of the medical operator. In addition the helicopter like the little GS106 is also equipped with a night vision system integrated, a device which projects thermal images directly on the front windshield portion. Pilot won't need to wear any night vision stuff that often makes the flight uncomfortable.
Exactly like the other projects pubblished on this site, the GS211 is provided of fly-by-wire controls since there's no hydraulic system aboard the aircraft. Actuators and servo are all electromechanical type, ensuring a rapid and accurate response, making the aircraft very rapid in response.
Landing gears have been redesigned, they include a rear pair provided of tilting system, and a front landing gear provided of two wheels which falls into the front box right below the fuselage's nose.
This machine may also fly according to three different mode, depending on the nature of the mission exactly as happen on the GS106.
GS211, however, unlike the little brother possesses an innovative boost system, allowing the aircraft not only to achieve a very high speed thanks to both tail rotors, but recovering exhaust gasses coming from the two turbine-engines to power partially the tail rotors, which are driven from both, a passive turbine and an electric motor, settled in two nacelles at the basement of the tail boom.

TURBO-ELECTRIC BOOSTER


The GS211 is undoubtedly the latest attempt to design an aircraft provided of electric motors, this helicopter is designed to remark once again this opportunity of innovation.
Both tail rotors are driven by electric motors coupled with a small passive turbine, I called it Electro-Turbo system. The idea is to avoid in some way to set in the tail area a complex and heavy transmission system, that would instead make the aircraft inconvenient, since all that complex stuff should be connectec mechanically to the main transmission system. The Electro-Turbo System instead uses only electric connections.
The electric motors therefore are simple connected via cable and as I already said they are mechanically overpowered by a small passive turbine, which uses the exhaust gas from the main turbine-engines, overdriving the electric motors. This system allows the recycling of a portion of thermodynamic energy produced by the main turbines which is directed on both Electro-Turbo booster increase cruise speed of the helicopter.
Both electric motors are powered by a suitable generator connected to the main transmission that operated only when required, the main power control indeed distribute the power needed in an optimal manner on both system at any flight condiction.
As well as the GS106 the GS211 can fly in three different ways as follow. Mode one or Helicopter mode: The aircraft does not need any further trust, since flight operation is conducted strictly within a conventional helicopter low speed, therefore not requiring additional thrust. During surveillance operations, aerial works, and of course during approach, landing and take-off in IGE conditions, the helicopter will fly always in H's mode or mode one.
Mode two, or HT mode, allows pilot to choose the use of both possibilities, in other words flying with both, main rotors and the two tail-rotors boosters, so as to increase cruise speed up to a certain limit. This mode requires a greater amount of energy, however it's very useful fly this way to cover medium distance in a medium-low time. The third mode or HS's mode instead is particularly suitable if pilot need to cover very long distances at high speeds. In this case the distribuition of the available power between the rotor's boost and the main rotor thrust is managed once again thorough the main electronic control system. The maximum power available it is mostly focused on both tail rotors booster (Electro-Turbo), while the main rotor could rotate almost completely in autorotation.
The thrust produced by both the turbo-electric motors allows the helicopter to reach a maximum speed approaching 300kts (556 Km / h) using mostly the electric generator which power both the Electro-Turbo's rotors, also recycling exhaust gas thermodynamically potential, to improve power on both electric motors.
This flight condition is certainly the most advantageous one, since the power applied on both tail rotors thrust is less than that applied on the main rotors. It is important to remark that the aircraft before getting in mode three (HS) will progressively achieve this flight condition, which is evaluated in a lapse of time of less than a minute from takeoff.
HS mode or mode three, is particularly adapted for covering long distances in a short time.
Rescue operation with a such type of aircraft would be pretty efficient. I designed also a special version of the GS211 shown here in this section ( Italian Coast Guard version) giving an idea of how effective and useful would be this new opportunity for patrol, active interventions or a fast surveillance of the coastlines, reducing drammatically the time of action down to one fourth if compared with conventional helicopters as we know today.

直升机GS211

直升机GS211


直升机GS211

直升机GS211


直升机GS211

直升机GS211


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