antonov An-225 Design

ANTONOV

Based on Antonov's earlier An-124, the An-225 has fuselage barrel extensions added fore and aft of the wings, which received root extensions to increase span. Two more Ivchenko Progress D-18T turbofan engines were added to the new wing roots, bringing the total to six, and an increased-capacity landing gear system with 32 wheels was designed. The An-124’s rear cargo door and ramp were removed to save weight, and the empennage was changed from a single vertical stabilizer to a twin tail with an oversized horizontal stabilizer. The twin tail was essential to enable the plane to carry large, heavy external loads that would disturb the aerodynamics of a conventional tail. Unlike the An-124, the An-225 was not intended for tactical airlifting and is not designed for short-field operation.

 antonov

nitially the 225 had a maximum gross weight of 600 tonnes (1,320,000 lb) but the aircraft was modified in 2000–01, at a cost of US$20M, with a reinforced floor that increased the maximum gross weight to 640 tonnes (1,410,000 lb).

 antonov an-225 mriya

Both the earlier and later takeoff weights establish the An-225 as the world's heaviest aircraft, being heavier than the double-deck Airbus A380 even though Airbus plans to pass the An-225's maximum landing weight with 591.7 tonnes (1,304,000 lb) for the A380The Hughes H-4 Hercules, known as the "Spruce Goose", had a greater wingspan and a greater overall height, but was 20% shorter, and due to the materials used in its construction, also lighter. In addition, the Hercules only flew once, making the An-225 the largest aircraft in the world to fly multiple times. The An-225 is larger than the Airbus A380 airliner, and also bigger than the Antonov An-124, Boeing 747 Large Cargo Freighter, and Lockheed C-5 Galaxy, the nearest equivalent heavy cargo aircraft

                    

                    

The secret behind Resistive Touch Screen technology

Touch screens are findingitsplace ineverydayelectronic devicesas well as the space station. You aresurrounded by touch screens andquite franklythey have made our electronic life less difficult. You no longer requirean externalkeypad,mouseand even astylusas the input device. You could makecomputers or devicedo your bidding with only so much as your fingertip, which is certainlyall you want.
Based on theapproachused to register a touch on the screen, touch screens are of 3different kinds:

• Resistive touch-screen
• Capacitive touch-screen
• Surface acoustic touch screen
Let usexamine the resistive touch screen. Dr. Sam Hurst filed the patent for resistive touch screens in 1971. Resistive touch screen has enjoyedbroad scaleacknowledgementit truly is still quite popularversion of touch screens employed ina variety ofelectronics.While itis actually asomewhat old technologyit is stillliked bymanufacturersfor itsdependability.


Thosewho arefamiliar withjust how the electricalswitchesin the houseget the job done willunderstand therationalepowering the resistivetouchscreen technology. The power switch in the homestands between the wires in the off position and does notenableelectric currentto circulate. Any time youturn the switch on contact is formedin between thewires and electricity flows thus providing thecurrent for the appliance attached to the switch. Resistive touch screen operate onidenticalprinciple, these are generallymade fromthe actual screen and a couple oftiers of conductive and resistive materialcorrespondingly. Many touch screens furthermore have a4th protective layer.



The levels are layered with transparent resistive material know as indium tin oxide. The sheetsare divided by pretty thin matrix of dots which isclear. An electric current close to 5voltscontinuescirculatingamongst the layers. Any time youpressa specificpart of the screen the pressureexertedby the finger or stylus results in contact between the conductive and resistive layers thus a circuit is formed. The controller registersalteration of the voltage and computes the coordinates with the help of an analog to digital converter.



Resistive touch screens could possibly be popular choice because they arereasonablyless expensiveto create also because theyhave existedfor quite a whilethese are typicallyregardedreputable by manufacturers. The monitoris likewiseimmune toalterations intemperature and pollution in the environment. The electrical current runningbetween the layersis simply notaffected byfluctuation in temperature. Rather than your fingers you may also use styluses, pencils or any otherobjectgiven that the screen will notrely on the conductivecapacityof the object utilized to register a touch on screen.

If resistive touch screen is sofantastic then why was there a need to develop new varieties oftouch screens you may ask? Well despite the fact thatthere are variousadvantagesyou can also finda handful ofdisadvantages. Most of uswould like our output devices for example our screen to be clear and clean. We really wish for it to display images in hi-defin any kind oflightconditions. Since the resistive touch screen consist ofseveral layers the lightoriginatingfromscreen is deflected to some degree. This makes ithard tosee the images and read text insunlight. Though some older version of resistive touch screens did not register multi touchhowever new era of resistive touch screen have much betterand more powerful controllersthat could register multi touch.

Resistive touch screen have notgotten to the end of their life yet and still beingadditionallyimprovedfor being aeffectiveand sturdyform oftouchscreen technology.