Rectrix October Issue

7/28/2019 Rectrix October Issue

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RECTRIX1Volume 2, Issue 1

From the Department of Aeronautical Engineering

R ajalakshmiEngineeringCollege

The human tailored idea thatanytime earns a bigAwww! .that marvelous formula

behind the fuel life of NASAs oldest longest...still maneuveringspace travel, Voyager 1 and voyager 2 THE GRAVITATIONAL

SLING SHOT.A gravitational slingshot or gravity assist or a swing by is a slick way to pick up speed of a space

borne craft by using the relativemovement and gravity of a planet or other celestial body to alter the pathand speed of a spacecraft, typicallyin order to save propellant, time, andexpense. Gravity assistance can beused to accelerate (both positivelyand negatively) and re-direct the

path of a spacecraft.The technique was first proposed asa mid-course maneuver in 1961, andused by interplanetary probesfrom Mariner 10 onwards, includingthe two Voyager probes' notable fly-

bys of Jupiter and Saturn.As we can observe, there are twodifferent cases when a space craftleaves the earth, viz., one travellingtowards the sun and other away fromthe same. The craft will accelerate inthe former case and decelerate in thelater case. If the space craft is justneeded to fly around the planet

present inner ward to the earth, it isallowed to maintain the samevelocity. But it is to be decelerated,if the space craft is expected to orbitthe same. Similarly, when thecosmic craft travels away from thesun it gets decelerated due to suns gravity. So we are in need of asource of acceleration or deceleration (in the former case) toassist the crafts further definedtrack. This very source we call asThe gravity assist or a sling shot.The shot, thats easy to think and

probably hard to play amidst thecosmic fabric, uses the mostfrequented law The conservationof energy .

The total change in velocity, experienced by the slungshot objectis , where is the incoming speed(from the planets perspective),and is the angle between theincoming and outgoing trajectories(again from the planets

perspective). So, a sharper angleyields a bigger boost. A slingshot

increases the kinetic energy of the body and decreases the kineticenergy of the planet, thus conservingthe energy.--The main practical limit to the useof a gravity assist maneuver is that

planets and other large masses areseldom in the right places to enable avoyage to a particular destination.For example the Voyager missionswhich started in the late 1970s weremade possible by the "Grand Tour"alignment of Jupiter, Saturn, Uranusand Neptune. A similar alignmentwill not occur again until the middleof the 22nd century.

In Short

Facultys Message Pg.2 National Seminar Pg.2 Hypersonic Flight Pg.3 Mind Boggler Pg.4 Crossword Puzzle Pg.4 News Pg.5

The change in velocity is depicted in the picture

News From the Department The Department organized a

National Level seminar on the

Emerging Trends in AircraftMaintenance The Department also Had alecture on Avionics byMr.U.S.Paul Russell Four students from Final year are participating in Spirit GlobalDesign Challenge (Jun- Dec) atWichita, USA. 10 Students from the Final year

were placed in TCS, 3 in WIPROand 2 in L&T Infotech

Arjun and Krishnarjun from firstyear won various prizes in AnnaUniversity Zonal Sports meet. Prof. S. Sivakumar presented a

paper on Vibrational Analysis of Active Landing Gear comparedwith Passive Landing Gear. PTA meeting was held on 8 th September.

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Gravitational Slingshot- The Conservative Game - Gokul-MythriMS


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RECTRIX2Vol2. Issue 1

Message From the HOD, Prof Yogesh Kumar SinhaThe Department of Aeronautical Engineering at the Rajalakshmi Engineering College is please to roll out the October 2012 edition of Rectrix.

I am pleased to inform that four of our final year students are participating in the Spirit Global Design Challenge sponsored by SpiritAerosystems Inc. (USA) in Wichita, Kansas and Infosys as the strategic design partner in India. In this regard, two of our Students will

be visiting North Carolina State University in Raleigh to present their work. On behalf of the college as well as Department of Aeronautical Engineering , I wish them best of luck.

Message From the Dean, Dr. S. ElangovanHuman mind has unlimited powers. Our ancient sages were aware of the full potential of human mind and they utilized their knowledgefor spiritual advancement. We are now living in an era of scientific advancement. Things considered impossible a century back have

become common household appliances. (http://zimmer.csufresno.edu/~fringwal/stoopid.lis).

"Heavier than air flying machines are impossible."

-- Lord Kelvin

This is Lord Kelvins statement in 1895. In 1903, Wright brothers demonstrated that it is possible. Twenty first century is going to be acentury of space exploration. All the natural resources of earth are fast depleting. Human population is increasing at an alarming rate."Our only chance of long-term survival is not to remain lurking on planet Earth, but to spread out into space." This is the statement bythe renowned astrophysicist Stephen Hawking. Hence we may expect very fast progress in space sciences in the coming years. I am sureRectrix will focus on all these developments and kindle the imagination of young minds so that India makes a significant contribution tothis collective human endeavour.

Message from Wing Commander, Prof. N.Muthusamy New economic reforms by the government in the recent days have given good hopes for the aviation sector. Foreign investments up toforty nine percent will envisage foreign fund inflow and growth of civil aviation. Airlines that are having severe blows on their profitsviz. Kingfisher Airlines, which are under the verge of collapsing may have new hopes of survival all thanks to the new economicreforms. The infusion of fund from foreign investment to Indian aviation sector also enhances employment opportunities for the trainedaircraft engineers.

Department of Aeronautical Engineering of Rajalakshmi EngineeringCollege Chennai in association with Aeronautical Society of India,Chennai Branch and The Institute of Engineers, Chennai Branch hasconducted a one day seminar on Emerging Trends in Aircraft

Maintenance on 24 August 2012 at college premises. Eminent personalities drawn from various organizations like HAL Bangalore, BlueDart Aviation Chennai, Air India Chennai and Air Force StationTambaram delivered special lectures on aircraft maintenance and itsindustrial perspectives.

Shri R.Arunagiri, Deputy General Manager, Hindustan AeronauticalLimited, Bangalore, chief guest of the day inaugurated the seminar anddelivered the key note address. Prof N. Muthusamy welcomed thegathering. A total of 210 delegates participated in the seminar.Mr.Yogesh Kumar Sinha, HOD delivered vote of thanks.

NATIONAL LEVEL SEMINAR

Message from Prof. Dr. P.S.VenkatanarayanA dearth of talent continues to weigh on Indias nascent defense and aerospace industry. Sourcing talent for the sector is going to becomea bigger challenge now because a lot of defense related programmers are drawing to a close, says Kunal Girap, Director, Walk Water, atalent advisory services firm.

India raised its defense budget by 17 per cent in 2012/13 alone to $38 billion. About $16 billion has been allocated this fiscal year for long-term asset creation, which would include modernization of the armed forces and procurement of weapons.

The Indian government is increasingly trying to source material and equipment locally for the defense and aerospace sector (about 70 per cent of the industrys requirements are currently met through imports). Foreign companies can bid for Ministry of Defense contracts onlythey have to set up an operational base in India through a joint venture (JV) with Indian companies.

For instance, BAE Systems India has a JV each with the Mahindra & Mahindra Group and the government owned Hindustan Aeronautics

Ltd. This is slowly and surely creating a big need for trained manpower. The industry needs engineers with a background in mechatronics(mechanical and electronic engineering), composites (combination and strength of materials) and system integration knowledge. FewIndian universities though offer courses tailor made for the defense and aerospace sector .The industry thus is trying to fill the gap by recruiting from heavy engineering and automobile companies.


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It was indeed meant to end up in theocean, but not in this fashion. The X-51A WaveRider, built for testingunmanned hypersonic flights,

plunged into the pacific just 15seconds into the flight last month. Ithappened even before its scramjetengine started to fire. A flaw wasspotted in one of its control fins and

hence it went out of control. Despiteits crash, engineers around the worldare in a race to find the mostappropriate propulsion and airframeto make a sustaining hypersonicflight.Ever since the German V-2 rocketattained hypersonic speeds, there is aquest to develop an hypersonicaircraft which could sustain longer.Hypersonic speed refers to speedsabove Mach 5, which is five timesthe speed of sound. There are many

problems with hypersonic travel asthe condition is quite different. TheX-43A, an experimental NASAspace plane, is the first aircraft toreach hypersonic speed, using an air-

breathing scramjet engine.

On November 16, 2004, in theunmanned test flight, the planereached Mach 10 -- 10 times thespeed of sound, or about 10,600kilometers per hour.The problem with hypersonic travelis to develop an appropriate

propulsion system for sustainedhypersonic flight and then anairframe that can sustain the shocksinduced during the flight. Theengines need to face exponentialchange in temperature with even asmall change in the velocity of thecraft, with speeds greater than mach5.

Air-breathing scramjet would be anideal propulsion system for hypersonic flights since it can easilyfly as fast as Mach 10. But there is amajor disadvantage. They start tooperate only at Mach 4 or 5. Thereare no moving parts in a scramjet.Hence the high airspeed and the

aerodynamic design of the engine isused to compress the air, rather thana compressor. Hence there arises anecessity to carry a secondary engineto attain mach 4 initially, after whichthe scramjet takes over. The X-43Awas boosted to about Mach 5 by aPegasus booster rocket.Currently there are many flawswhich need to be rectified before thefirst operational hypersonic aircraftenters service, but thats not too far away. . Peter Robbie, vice presidentof the European aerospace anddefense corporation (EADS), toldBBC, "The business community whowanted to be in New York in threehours made Concorde highly viableand now there's interest on both sidesof the Atlantic to jump a generationand go from supersonic flight tohypersonic flight". He believes thathypersonic passenger planes will be

available by around 2050

Across the Pacific- In Two hours. Possible?-Deepak Prem

Do you have articles?Email to : [email protected]

The aeronautical department is delighted to have a new faculty Mr. Surendra Bogadi. Wewelcome Mr.Surendra Bogadi, to the department on behalf of all faculty and students. Mr.Surendra Bogadi completed his B.Tech in Aeronautical Engineering from Jawaharlal NehruTechnological University ,Hyderabad. He went to pursue his M.E. in Aerodynamics from

Birla Institute of Technology and Science, Ranchi. His area of expertise includes flow fieldinvestigation around a re-entry space capsule, measurements of unsteady pressure in region of body fence junction at supersonic speeds and life assessments of high temperature power plantcomponents. He handles Computational Fluid Dynamics for final year students.He is anexperienced faculty with more than four years of teaching experience. We are lucky enough tohave such experienced faculty amongst us.

Mr.Surendra Bogadi


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Crossword Puzzle- Venkatasubramanian

Mind Boggler- Venkatasubramanian

1. Unless otherwise published, allground-control frequencies begin

with what three numerals?2. Name the smallest sea plane ever to be produced by GrummanAircraft Corp., now NorthropGrumman

3. Name the world's most produced jet fighter capable of maintainedsupersonic speeds in level flight

4. Name of the world's fastest four seat seaplane

5. What was the first U.S. bomber toattack the Japanese mainlandduring World War II?

6. Name the first aircraft ever to perform the "cobra maneuver

7. Largest ever single piston engineattack aircraft

8. The name for a person going tospace via the Indian SpaceProgram

Send In your answers for a lucky prize!


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Flying car is more often aHollywood creation than an actual

reality and even at this pointwhere technology might beadvanced enough to make it

possible, one just gets the feelingthat there might be plenty of hassleswhen every other person is allowedto take the skies. Moller International has been on a course tomodify the Ferrari 599 GTB into aflying car Autovolantor, a car withan ability to lift you out of trafficand liberate you from the long queuethat you are stuck in. This would bethe ultimate delight for those drivingthe conceptual Autovolantor Justimagine a car behind you stuck in along traffic queue lift up into the air and just fly away while you reachhome 4 hours later after goingthrough the maze on ground.

The Ferrari 599 GTB was found to be the perfect car to be modified byMoller International and once againthat speaks volumes aboutwhy Ferrari is so special.Autovolantor will be fitted with 8fans to lift it vertically up in the air

and will have a ground mileage o150 miles while it would be 75 milesin air. The car can also reach up toan altitude of 5000 feet and isexpected to go at 150 mph in air.The Autovolantor still has manyskeptics around it and while therewill be few who will believe thatflying cars will further add tonational security woes, there willalso be many who will happily shellout $ 500,000 for one of these. TheAutovolanter is Moller's latestcreation, with its target to be astylish, desirable sports car that canalso occasionally fly. Moller'stargets for the project include arange on the ground of 240 km,with 120 km of travel possible in theair. The Autovolanter must also beeasy to fly, with no specialist pilotknowledge necessary.

To achieve the car's flyingcapability, it will be necessary to fitan artificial stability system similar in theory to that used by theEurofighter jet, where the craft isinherently unstable, but thecomputing power on board is quick

enough to control movement.However, this does require thefitment of a large wing, which foldsover the back of the car. Moller calculates that the Autovolanter willrequire over 800bhp to accomplishhis objectives, but even a highlytuned version of the Ferrari V12would be of no use, as it's a heavyengine that is not suited to Moller's

propulsion system.Instead, the Autovolanter utilizes a

hybrid system of rotary engines withabout 320bhp and electric motorswith nearly 500bhp. The car's rangeis limited by the amount of fuel itcarries on board, as extra weightmeans less time in the air and more

power required to get airborne.

Advances in the field of Aviation-Christopher Bharath M

A good scientist is a person with original ideas. A good engineer is a person who makes adesign that works with as few original ideas as possible.

- Freeman Dyson


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India Lifts Block On Foreign Airline Investment The Indian government has finally given in to

demands to ease restrictions on foreign directinvestment (FDI) in the countrys strugglingairlines. The unexpected September 14announcement clears the way for foreign carriersto take up to a 49-percent stake in Indianoperators, with the exception of government-owned Air India. However, industry and financialanalysts indicated to AIN that they view the

policy U-turn cautiously, warning that it wont necessarily mean salvation for cash-strapped carriers.

Deccan Shuttles Launches Regional Service for Indias Gujarat State

The western Indian state of Gujarat has what

amounts to its first regional airline with thelaunch of Deccan Shuttles by G.R. Gopinath, whofounded Indias first low-cost airline, Air Deccan,

before selling it to Kingfisher Airlines. Scheduledoperations started on August 27 using a pair of nine-seat Cessna 208B Grand Caravans. Theturboprop singles ply the Ahmedabad-Surat-Bhavnagar and Ahmedabad-Kandla routes,marking the first-ever direct air service between

provincial cities in this large state. Gopinath,himself a former airline captain, plans to extendthe model to northeast India and some regions inthe south of the country.

Aviation Turbine Fuel Prices Cut by 4.3% In a major relief to cash- strapped airlines, jet fuel

(ATF) prices were today cut by a steep 4.3 per cent, the first reduction in rates in three-and-a-half months.

India's GSAT-10 communication satellite launchedsuccessfully

India's heaviest satellite, the 3,400kg GSAT-10,was successfully launched from French Guiana inthe early hours of Saturday. The Indian SpaceResearch Organization's 101st mission will give a

big boost to communication, entertainment and

civil aviation as the satellite carries 30transponders and a component of navigationsystem Gagan.Since India's cryogenic engine isstill under development, ISRO chose to use theEuropean Space Agency's Ariane-5 rocket tolaunch the communication satellite, even thoughit meant costing double the money, about Rs 750crore.

Dr.S.Elangovan,ChairmanJawaharsivabharathy, Lecturer,Co-ordinatorVenkatasubramanian(2011), Editor in Chief , Visual EditorChristopher Bharath (2009), Assistant Editor

[email protected]@rajalakshmi.edu.in

www.facebook.com/RectrixMagazine

+91-9381981009+91-9789860328+91-9789022911

We are seeking to build our forcesJoin us: [email protected]

We welcome Mr.Jawahar Sivabharathy to the department on behalf of all facultyand students. Mr. Jawahar, an alumni of our college, completed his B.E. inAeronautical Engineering from our institute, Rajalakshmi Engineering College. Helater on earned his M.E. degree in Aerodynamics from Birla Institute of Technologyand Science, Ranchi. His area of expertise includes fluid mechanics, aerodynamicson double delta wing, wind tunnels and flow visualization techniques. He handlesfluid mechanics to the second year students and Industrial Aerodynamics to the finalyear students. It is indeed a boon for the department to have such experiencedfaculty.

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