Gyrocopter.pptx

VISVESVARAYA TECHNOLOGICAL UNIVERSITY JNANA SANGAMA, BELGAUM-590014, KARNATAKA, INDIA.

TECHNICAL SEMINAR ON: ON :

“GYROCOPTERS” 1Y

RA,ESH S 8'RR'5ME595 Under the Gud!n"e #$ 

ANAN% A ASSISTANT PROFESSOR 

%EPARTMENT OF MECHANICAL ENGINEERING

RAJARAJESWARI COLLEGE OF ENGINEERING &'() R!*#h!++) ,u*-!+!.#du) M/0#re R#!d) 1en.!+uru 2 34556(7

CONTENTS Introduction History Components of Gyrocopter Aerodynamics of Gyrocopter. Models of Gyrocopters. Application. Advantages and Disadvantages 

INRODUCTION An autogyro also known as gyroplane , gyrocopter , or rotarplane, is a type of rotorcraft wic uses an unpowered rotor in autorotation to develop lift, and an engine!powered propeller, similar to tat of a "#ed!wing aircraft, to provide trust. An autogyro is caracteri$ed %y a free!spinning rotor tat turns %ecause of passage of air troug te rotor from %elow.   &e rusing air spins te rotor as te air craft is lift forward %y an engine driven propeller. Modern gyroplanes use a puser propeller and are ligt and maneuvera%le. 

HISTORY  'panis inventor (uan de Ia Cierva %uilt te "rst )Autogiro) in *+-

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 &e "rst controlled igt occurred on (anuary */, *+-. Cierva was inuenced %y te 0rigt 1roters2 plane design %ut wanted to create a plane tat ew %etter at low speeds.

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 &e autogyro tat successfully ew in *+- was Cierva2s fourt design. His "rst tree autogyro designs failed %ecause of a rigid rotor wic caused te aircraft to tilt and provided an un%alanced lift

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Autogyro kites were 3secret weapons4 used %y Germany in 00II

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*+5- saw te re%irt of interest in te gyroplane wit te invention of Dr. Igor 1ensen2s patented )Gyrocopter.)

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COMPONENTS OF GYROPLANES 

AIRFRAME  &e airframe provides te structure to wic all oter components are attaced. Airframes may %e welded tu%e, seet metal, composite, or simply tu%es %olted togeter.

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 POERPLANT &e power plant provides te trust necessary for forward igt, and is independent of te rotor system wile in igt. 0ile on te ground, te engine may %e used as a source of power to rerotate te rotor system

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ROTOR SYSTEM

 &e rotor system provides lift and control for te gyro plane. &e fully articulated and semi!rigid rotor systems are te most common. 

TAILSURFACES

 &e tail surfaces provide sta%ility and control in te pitc and yaw a#es. &ese tail surfaces are similar to an air! plane and may %e comprised of a "n and rudder, sta%ili$er and elevator.

LANDING GEAR

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 &e landing gear provides te mo%ility wile on te ground and may %e eiter conventional or tricycle. Conventional gear consists of two main weels, and one under te tail.

INGS 0ings may or may not comprise a component of te gyroplane. 0en used, tey provide increased performance, increased storage capacity, and increased sta%ility

AUTOROTATION  A gyroplane rotor system operates in autorotation.  &is means te rotor spins freely as a result of air owing up troug te %lades, rater tan using engine power to turn te %lades and draw air from a%ove.  6orces are created during autorotation tat keep te rotor %lades turning, as well as creating lift to keep te air! craft aloft.  Aerodynamically, te rotor system of a gyroplane in normal igt operates like a elicopter rotor during an engine!out forward auto rotative descent. AERODYNAMICS

OF GYROCOPTER

!ERTICAL AUTOROTATION During a vertical autorotation, two %asic components contri%ute to te relative wind striking te rotor %lades.   7ne component, te upward ow of air troug te rotor system, remains relatively constant for a given igt condition.   &e oter component is te rotational airow, wic is te wind velocity across te %lades as tey spin.   &is component varies signi"cantly %ased upon ow far from te rotor u% it is measured. 

GYROCOPTERS  &rust is produced %y an engine!driven propeller.   &e unpowered, freely turning rotor is tilted %ack as te gyro plane moves forward . 7ncoming airow troug te rotor causes it to spin, producing lift. &is is called autorotation. Always operates in autorotation, tus8 Cannot stall like "#ed wing aircraft. 6lies safely at low altitudes and low speeds. 9o need for eavy main rotor transmission nor a tail rotor. 

HELICOPTERS  &e powered rotor produced %ot lift and trust, and is tilted forward. Can over, %ut powered rotor re:uires8 Ade:uate forward speed and;or altitude to maintain igt in case of power failure. 

GYROPLANE MODLES  &ere are do$ens of gyroplane kit manufacturers and models. Here are =ust a few of te most popular in te 7>