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#IP 1031 25 June - 1 July 2012

Best Cited Article

The paper 'Combustion Synthesis and nano materials' in 'Current opinion in solid state and Materials Science', 12(3 - 4) (2008) by Dr S T Aruna, Scientist, SED, has been awarded the Top Cited article for the period 2007 - 11.

Down the memory lane
A decade ago


Dr Niranjan Kumar Sura, Dept. of Aerospace Engg. IIT, Bombay spoke on ASE Stability and Gust Response Studies on Simplified Aircraft Configurations and Dr M Rajesh, Dept. of Aerospace Engg. IIT, Bombay will speak on Time Domain Simulation of the Dynamics of Non-Linear Systems Subjected to Random Loads. 
10.30 a.m., Seminar Hall, Technology Block.

Prof E G Tulapurkara and Mr J Srikanth, Department of Aerospace Engg., IIT, Madras spoke on Dynamic Model for Large Eddy Simulation and its Implementation in a Code. 
3.00 p.m., T S Seminar Hall.


Mr Krishna and Mr K S Mallikarjunappa, Gulbarga University spoke on Java Based Visualization Package and Internet Based Weather Forecasting. 
3.00 p.m., C-MMACS Confernce Hall.


Structures Division Lecture Series: Dr Somenath Mukherjee, Structures Division, continued his series on Basics of Structural Dynamics. 
10.30 a.m., Seminar Hall, Technology Block.

Dr S Majumdar, CTFD Division, spoke on Visit to CTR, Stanford. 
3.00 p.m., Mini Conference Hall, NWTC, Belur Campus.

A Glimpse of History of Science

27 June 1978
Soyuz 30 carried 2 cosmonauts (1 Polish) to Salyut 6 space station

27 June 1978
U.S. Seasat 1, 1st oceanographic satellite, launched into polar orbit

28 June 1983
NASA launched Galaxy-A

29 June 1985
NASA launched Intelsat VA

29 June 1985
STS-51-F vehicle moved to launch pad

30 June 1982
Orbiter Challenger (OV-099) rolled out at Palmdale

1 July 1997
STS-94 (Columbia 23) launched into orbit

1 July 1994
Soyuz TM-19 launched

1 July 1993
Russian manned space craft TM-17, launched into orbit

1 July 1993 in History
STS-57 (Endeavour) landed


#IP 1030 18-24 June 2012


The second flight test of the indigenous 55 hp Wankel Rotary Combustion Engine was carried out on 20th June 2012 on the Aeronautical Development Establishment’s (ADE), NISHANT UAV at Kolar airfield. The engine was the second flight worthy prototype delivered to ADE by NAL. 

The flight took off at 1430 hrs in the afternoon and climbed to an altitude of 1.9 km. The total mission duration was 1 hour 45 min. The UAV was recovered safely at the intended place at the dried-up Muduvadi lake, after the successful mission. The event was witnessed by key personnel: Dr V K Saraswat, SA to RM, DG DRDO, Shri G Elangovan, CC R&D (Avionics & Aero), Shri PS Krishnan, Director, ADE, Shri Shyam Chetty, Director, NAL, Dr C P Ramanarayanan, Director, VRDE and Dr K Tamilmani, CE CEMILAC, the Regional Director, RCMA, and other senior officers.

The indigenous engine development program was originated from DRDO through Vehicles Research & Development Establishment (VRDE), Ahmednagar, and was jointly designed and developed by CSIR-NAL, VRDE, and ADE. Under this program the 55 hp Wankel engine was developed for ADE’s NISHANT UAV. NAL designed and developed the core engine, VRDE and ADE were in-charge of peripheral systems and flight testing respectively. As per the MOU two flight worthy proto type engines were delivered. First engine was delivered in January 2009 and completed a 40 min maiden successful flight on 31st march 2009. The flown engine underwent 20 hours and 10 hours of pre and post flight tests respectively. The post-flight test was carried out and confirmed that engine’s performance was matching with the pre-flight performance.

The Wankel engine is the first of its kind that was totally designed and developed in the country. Very few countries in the world have the capability to develop and master this technology. The engine was cleared for flight after rigorous ground endurance test runs. A provisional flight clearance for the indigenous prototype engine was given by the certifying agency, RCMA which comes under CEMILAC. The engine performed very well in the flight, meeting all the requirements of the Air Vehicle.

            This type of engines are used for powering smaller air vehicles and also in automotive (Mazda, and Racing Cars), out-board motor for boats and other industrial applications in particular for power generation, typically up to 80 kW.

K M Pillai

Down the memory lane
A decade ago


Structures Division Lecture Series: Dr Somenath Mukherjee, Structures Division, continues his series on Basics of Structural Dynamics. (Lecture #2: Transient Response of Single Degree of Freedom Systems and Vibrations of Multiple degrees of Freedom Systems). 

10.30 a.m., Seminar Hall, Technology Block. 


A Glimpse of History of Science

18 June 2009
The Lunar Reconnaissance Orbiter/LCROSS is launched by NASA to probe the Moon

20 June 1996
Space Shuttle STS-78, Columbia 20, launched into space

21 June 1975
Soyuz 19 returned to Earth

22 June 1973
Skylab 2's astronauts landed

24 June 1982
Jean-Loup Chretien, 1st spacionaut, 2 others, lift off (Soyuz T-16)

24 June 1982
Soyuz T-6 Launched (U.S.S.R.)

#IP 1029 11-17 June 2012

#IP 1028 4 - 10 June 2012

20th Anniversary Celebrations of the National Control Law Team

Down the memory lane
A decade ago

Dr Somenath Mukherjee, Structures Division, NAL and Associate, C-MMACS will speak onVariational Correctness in Finite Element Solutions through Reduced Integration. 
3.30 p.m., C-MMACS Conference Hall.

Luna Majumder, Structures Division, will speak on A time domain approach for damage detection in beam structures using vibration data with a moving oscillator as an excitation source
10.30 a.m., Seminar Hall, Technology block.

A Glimpse of History of Science

4 June 1985
STS-51-G vehicle moved to launch pad

5 June 1980
Soyuz T-2 carried 2 cosmonauts to Salyut 6 space station

6 June1985
Soyuz T-13 carried 2 cosmonauts to Salyut 7 space station

7 June 1979
Bhaskara1, Indian Earth resources/meteorology satellite, launched

8 June 2007
Space Shuttle Atlantis, STS-117, began mission

9 June 1985
U.S.S.R.'s Vega 1 deposited lander on surface of Venus

10 June 1973
NASA launched Radio Astronomy Explorer 49 into lunar orbit


National Control law team of LCA is a very unique team formed in 1992. The team is the result  of a truly great visionary Dr APJ Abdul Kalam the then SA to RM. The team took up the challenge of building fly-by-wire control laws for an unstable fighter aircraft for the first time in India. This talented and enthusiastic team celebrated its 20th Anniversary on 2nd June 2012 in Dr. Valluri Auditorium, National Aerospace Laboratories.

The celebrations started with an invocation by Dr. Girija Gopalaratnam, Acting Head, Flight Mechanics and Control Division. Mr. Shyam Chetty, Acting Director, NAL, extended a warm welcome on behalf of CSIR-NAL and National Control Law Team to all the invitees from DRDO, ADA, HAL and CSIR-NAL for this memorable day. He narrated the circumstances that had led to the formation of the National Control Law Team. A global tender was floated in the early 1992 seeking consultancy support from reputed airframe houses abroad for the design and development of fly-by-wire control laws for LCA. When no favorable response was received, Dr. Kalam immediately formed an empowered committee headed by late Prof. I G Sharma of School of Automation -IISC,  Dr. Vidyasagar the then Director, CAIR-DRDO and many others to scout for suitable talent across various IITs, IISc, R&D institutions and Public Sector  units. Since it was very clear that no single institution in India could claim to have required strength, experience / expertise to carry out this highly complex, safety critical and multi disciplinary task. This talent search lead to the formation of National Control Law Team very popularly known as CLAW Team at CSIR-NAL, with Dr. S Srinathkumar as founder Project Director. Initially team members were drawn from CSIR-NAL, CAIR and ADA along with one test pilot Wg. Cdr. BB Misra from IAF.

Mr. Shyam Chetty informed that first flight of LCA took place on 4th January 2001 and said that 9 years had elapsed from the time the team was formed. He justified the time taken for this task by comparing it with similar programs in the world.  Mr. Shyam Chetty mentioned that over 1900 successful flights on 13 prototypes including the 2 seater trainer and naval variant have been flown by 19 IAF pilots and all of them are very appreciative of the performance of the flight control system and control laws including flying qualities and the ease with which the aircraft handled. Mr. Shyam Chetty emphasised that the LCA program has reached an important milestone in achieving Initial Operation Clearance (IOC) as this will enable the IAF’s squadron pilots to fly TEJAS. He also reminded that the team still had some distance to go before the aircraft got its Final Operation Clearance (FOC). He concluded his address by saying that the expertise and experience gained by the team over the years in this niche strategic area has been shared and found useful by all other major national aerospace programmes.

Prof. Samir K Brahmachari, DG-SCIR graced the occasion as the chief guest. In his address, he quoted that, “very often we say, we can’t do things together and when people do things together, we say because they can’t do it alone”. Therefore, it needed no less than Dr. Kalam the visionary to mobilize this team. He said, NAL is very important for CSIR, and Aeronautics Research is very important for the country. Therefore, he visited NAL many times since he had taken over as DG-CSIR to encourage the team NAL. He mentioned that he was glad to see Dr. Mashelkar’s vision of  a CSIR civil aircraft flying in Indian skies had been taken up by NAL. Prof. Samir K Brahmachari stated that such celebrations allows us to go back in years, sit and think under what circumstances these collaborations were built, and also allows us to think about new collaborations that need to be built so that they can be celebrated 20 years from now. He informed the august audience about the CSIR’s vision document and the paradigm shifts that CSIR has initiated to build a new CSIR. He suggested DRDO / ADA / NAL management to earmark part of the project funds to address futuristic projects and dedicate a team of youngsters who will think differently on realizing futuristic aeronautical needs of the country. He again reiterated CSIR’s commitment to partner the strategic sector organisations in meeting the nation’s requirements. He stated that CSIR-NAL should continue to take the initiative in conducting cutting edge research in Aerospace Science and Engineering of tomorrow.

On this momentous occasion, DG-CSIR handed over a CD containing the IOC version of the Control Laws and Airdata Algorithms to AVM RKS Bhadauria,  ACAS (Projects) and to Mr. P S Subramanyam, Director ADA. Air Marshal R K Sharma, DCAS who had initially promised to be part of the celebrations has instead sent a message. The message reads, “I sincerely appreciate the efforts of CSIR-NAL and congratulate them for reaching the important (IOC) milestone. You and your team have done an outstanding job over the years, working with scientific diligence and above all confidence tempered with humility. I would like you to know that every time I flew the LCA, I knew, that the CLAW which is the heart of the system, is robust and will not fail, that belief alone made me fly confidently. I believe that is a sentiment shared by the other LCA Test Pilot’s as well. I wish I could have made it to the function, sadly, I can’t”.

AVM RKS Bhadauria, in his remarks said that it was a momentous occasion because of the IOC – CD that he had received. He mentioned that the IOC-CD he was holding could be the most valuable CD in the country. He remembered that as a test pilot of Tejas, he had close interactions with the team and had a great confidence in the team. He mentioned that CLAW was never an issue in the planning of flight testing. He stated that to the best of his knowledge TEJAS was the only fly-by-wire fighter aircraft in the world that had test flown over 1900 sorties without even a single major problem. He also appreciated that the team had contributed in many other areas apart from CLAW such as Notch filter design, PID and so on. He concluded his speech by asking the team to continue in the same manner in future.

Mr. P.S.  Subramanyam, Director ADA in his remarks informed the audience that, he had started interactions with the CLAW team as Project Director, IFCS-LCA. He recollected that right from the beginning the team had met all the deliverables on time without any delay. He appreciated that the team had never compromised on safety even under tremendous pressures from program management and the outcome of this commitment was the robust and fault free control laws. He was confident that  the team would continue the work with the same commitment in the future. Apart from designing the control laws, he said the team had contributed a lot to TEJAS. He remembered the participation and significant contributions of the CLAW team in clearance activities at Iron-Bird. He said the team showed the same level of commitment and help in designing and clearing the robust redundancy management algorithm of FCS. He also  acknowledged the outstanding contributions of the team in the area of simulation and modelling.

During the celebrations, the National Control Law Team showcased the achievements of CLAW through a small technical session. Two presentations were made in this session by CLAW team members. Dr Abhay Pashilkar, Scientist, NAL made a presentation on “Modelling and Simulation activities of  Tejas”. In his presentation, Dr. Pashilkar brought out the flight dynamic analysis of an unstable aircraft, aircraft simulation including subsystems modeling and also explained the challenges faced in the complex modelling of aircraft wake. Later Dr. Vijay V Patel, Scientist, ADA made a presentation on “Design and Development of Flight Control Laws for LCA”. In his presentation, Dr. Patel outlined various activities of the CLAW team. He highlighted the complexities of this airframe such as local pitch up, leading to  small time to double, large variation in centre of gravity and many more issues that posed interesting problems to the designers.

In his presidential address, Dr. Kota Harinarayana former Program Director-LCA stated that National Control Law Team is “a jewel in the crown of the LCA program”.  He said, CLAW apart from Stability Augmentation provided predictable Handling Qualities, Carefree & Boundary Limiting features leading to Safe operations and served as an ideal  weapon system platform. CLAW is a crucial link between the airframe and the pilot. He brought to the notice of the audience that CLAW technology is in the prohibited list of US and other  advanced nations.  National Control law Team under able leadership of Dr. S Srinathkumar and subsequently Mr. Shyam Chetty ably assisted by Dr. Girish Deodare and team demonstrated high standards of competence, professionalism, team spirit, dedication and modesty. They had delivered a product that continues to receive accolades from all experts in aerospace engineering and from all the pilots who have flown LCA. He remembered his interactions with US pilots during IFS testing and quoted one of the F16 pilot’s statement “F16 airframe flies better with LCA control laws”. He concluded his speech by hoping the team would grow in numbers so that it could to contribute for many other national programs.

As part of the celebrations, the team felicitated the dignitaries in the audience who directly or indirectly contributed to the National Control law Team’s success by presenting mementos. Dr. S Srinathkumar, founder project director – CLAW, Dr. T S Prahlad, Former Director –NAL, Airmarshal Rajkumar (Retd), Mr. G Elengovan – CC R&D (Aeronautics and Avionics), DRDO and many other dignitaries were present at the function.  Mr. P V S Murthy, Scientist, NAL & Member of CLAW team gave  the formal vote of thanks. He thanked all the dignitaries on and off the dias and all the invitees for their august presence at the function. The entire celebrations were compered in style by Dr. Amitab Saraf, Scientist, ADA along with Dr. Jatinder Singh, Scientist, NAL.

On the same day, immediately after the function, DG – CSIR inaugurated the new “Centre of Excellence in Flight Mechanics & Control” building, built adjacent to the Systems Building of   National Aerospace Laboratories. The building hosts modern facilities including the Augmented Engineering Environment (AEE) and Micro Air Vehicle (MAV) Laboratory.

Satyanarayana Murthy P V


TEAM NAL wishes our colleagues a very happy, healthy and productive life after superannuation on 31 May 2012.
Mr Ansar Hussain, CAD
Mr A.Kanagaraj, FRP
Dr R.Kannan, PR
Mr K.Siddappa, PR

Editor: Dr C Divakar, Joint Head, KTMD, NAL.
Editorial Support: N Shailaja Menon.
Production Support: A S Rajasekar.
Photography Support: D V Gopalakrishna and A B S Vijai.
NAL, P B No. 1779, Bangalore 560017.
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