Stealth helicopter

Stealth helicopters are helicopters that incorporate stealth technology to decrease an enemy's detection ability. There are a diverse range of technologies used to achieve this decreased detectability; these have largely involved the reduction of several different signatures typically generated by a rotorcraft, including those of noise, radar, and infrared.
In many ways, helicopters are less suitable for stealth technology than fixed-wing aircraft are; one such area is their rotor blades, which not only generate copious noise levels but can also give off a strong radar signature. However, blade designs have been developed that can significantly reduce noise, which has traditionally been a major issue for any operation involving the clandestine use of helicopters. Numerous helicopters have incorporated profiled fuselages to reduce their radar cross-section (RCS), constructing elements of the rotorcraft from of certain materials is another means of minimising radar visibility.
It is known that some nations have used such rotorcraft operationally, albeit in a limited scope, since the 1970s; a modified Hughes 500P was used by the Central Intelligence Agency (CIA) during the Vietnam War. Various helicopters have been furnished with infrared exhaust suppressors to reduce their vulnerability to infrared homing weapons. Attack helicopters, such as the HAL Light Combat Helicopter and Eurocopter Tiger, have incorporated numerous presence reduction technologies into their design to increase their survivability. The raid on the compound of Osama bin Laden in May 2011 utilized what appeared to be two Sikorsky UH-60 Black Hawks, heavily modified for quieter operations and employing stealth technology to be less visible to radar. Furthermore, various nations have stated their ambitions to introduce their own stealth helicopters.
History.
Efforts to develop helicopters which possessed low observability characteristics commenced during the Cold War period. It was during this time that several different stealth helicopters would first emerge. The Central Intelligence Agency (CIA) was one such party seeking such rotorcraft, during the early 1970s, a single modified Hughes 500P was produced for the agency; it had a reduced noise operation capability, leading to its nickname of "The Quiet One". It was reportedly used in at least one operation by the CIA, to deploy a wiretap during the Vietnam War.
Such helicopters were considered advantageous by several military planners. The United States Army sought to develop a stealth helicopter for aerial reconnaissance missions; between 1996 and 2004, work on the Boeing/Sikorsky RAH-66 Comanche entered the prototype stage with an eye towards production. However, the Comanche programme was ultimately cancelled, both due to rising costs and the considerable technical issues which had been experienced. However, other efforts continued. It is known that a number of Sikorsky UH-60 Black Hawks have been outfitted with stealth technologies; these features reportedly include the use of specialized materials, along with numerous harsh angles and flat surfaces across the exterior fuselage, techniques that had previously been employed upon other stealth aircraft.
It is believed that one or multiple of the UH-60 Black Hawks used in the raid upon Osama bin Laden's compound on 1 May 2011 featured stealth technologies. Prior to the raid, the existence of such helicopters had been unknown. One of the UH-60s had crashed during the raid, leading to the remains being recovered and studied by various authorities, revealing the existence of this type to the public. According to F. Michael Maloof, a former Pentagon senior policy analyst, identical stealthy UH-60s have been supplied to Israel and used for intelligence gathering missions inside Iran. Maloof’s claim, however, is not supported by any evidence.

Kailash Chandra Meher

Kailash Chandra Meher (born 22 January 1954) is an Indian artist, inventor, and social activist. He is a painter of contemporary modern art paintings and traditional Tussar Pattachitra paintings of Odisha. He was a recipient of the Padma Shri by the Government of India in 2013.
Personal life and education.
Meher was born in an artist family in Sonepur town of Odisha state. He studied at Visva-Bharati University, Santiniketan and received a Diploma in Fine Arts from the Visva-Bharati University, Shantiniketan in West Bengal. He was trained in the art of Pattachitra painting initially by his father and subsequently under guidance of Bhagwat Maharana.
His wife Smt. Laxmi Meher and daughter Manisha jointly received National award in 2005. Smt Meher had also received state award in 1990 while daughter Manisha got two state awards in 2001–2002. Both his sons Prakash and Jayanta got National Award in 2001.
Career.
Meher worked as an art designer in the Weavers Service Centre in Bhubaneswar, Govt. Of India, under Development Commissioner Handloom, New Delhi from 1978 to 1993 creating textile designs for weavers and weaving organisations, and developed some old Bomkai designs, which were developed into a product called "Bomkai Sari".
Meher creates new designs, techniques with research and experiments, aiming for better market promotion in India and abroad. His tree paintings were presented as an example for the Shilp Guru award. Because of his excellent work in paintings, many more students and followers got National Award and also thousands of artisan families survive their livelihood by following his innovative creative designs & paintings for their bread & butter.
For the poorest girls & women of KBK district, he has started many social organisations with the help and support of The Collector (District Magistrate) for giving them training & employment, so he started some Handloom, Handicraft & Fine Art organisation like :- 1. Indian Art & Craft Academy for Women 2. Indira Gandhi Women Weavers Co-operative Society limited 3. Bharatiya Hastakala Industrial Co-operative Society Limited 4. Handicraft & Handloom Museum and Service Centre for Women.