A. P. J. Abdul Kalam

A. P. J. Abdul Kalam, is an Aerospace engineer, professor, and chancellor of the Indian Institute of Space Science and Technology (IIST), who served as the 11th President of India from 2002 to 2007.^[1] During his term as President, he was popularly known as the People's President.^[2][3]He was awarded the Bharat Ratna, India's highest civilian honor in 1997.Before his term as India's president, he worked as an aeronautical engineer with DRDO andISRO. He is popularly known as the Missile Man of India for his work on development of ballistic missile and space rocket technology.^[4] Kalam played a pivotal organizational, technical and political role in India's Pokhran-II nuclear test in 1998, the first since the original nuclear test by India in 1974.^[5]

He is currently the chancellor of Indian Institute of Space Science and Technology, a professor at Anna University (Chennai), a visiting professor at Indian Institute of Management Ahmedabad,Indian Institute of Management Indore, and an adjunct/visiting faculty at many other academic and research institutions across India.

In May 2011, Dr. Kalam launched his mission for the youth of the nation called the What Can I Give Movement.^[6] Dr. Kalam better known as a scientist, also has special interest in the field of arts like writing Tamil poems, and also playing the music instrument Veena

Sun and planet gear

The sun and planet gear converted the vertical motion of a beam, driven by a steam engine, into circular motion using a 'planet', a cogwheel fixed at the end of the pumping rod (connected to the beam) of the engine. With the motion of the beam, this revolved around, and turned, the 'sun', a larger rotating cog which turned the drive shaft, thus generating rotary motion. An interesting feature of this arrangement, when compared to that of a simple crank, is that when both sun and planet have the same number of teeth, the drive shaft completes two revolutions for each stroke of the beam instead of one. Note the planet-gear is fixed to the pumping rod and thus does not rotate around its own axis.The axis of the planet gear is connected to the axle of the sun gear, and therefore the flywheel, by a linkage that freely rotates around the axis of the sun gear and keeps the planet-gear engaged with the sun-gear.

Sun and planet gear

The sun and planet gear converted the vertical motion of a beam, driven by a steam engine, into circular motion using a 'planet', a cogwheel fixed at the end of the pumping rod (connected to the beam) of the engine. With the motion of the beam, this revolved around, and turned, the 'sun', a larger rotating cog which turned the drive shaft, thus generating rotary motion. An interesting feature of this arrangement, when compared to that of a simple crank, is that when both sun and planet have the same number of teeth, the drive shaft completes two revolutions for each stroke of the beam instead of one. Note the planet-gear is fixed to the pumping rod and thus does not rotate around its own axis.The axis of the planet gear is connected to the axle of the sun gear, and therefore the flywheel, by a linkage that freely rotates around the axis of the sun gear and keeps the planet-gear engaged with the sun-gear.