Sunday, December 30, 2007
Are you ready for it? 9th april 2008 is the launch date for the event!!!!
And click here to see what has happened in year 2007 for the chandrayaan-1 mission!!
Thursday, December 27, 2007
mail...... I liked the sound of it............AMAeSI fraternity !!!!
That's sounds so good. Here's wishing that next year brings this aesi
community much nearer and efforts of Bishnujee and Air Cmde Raghubir Singh
Happy New Year folks!!!
Enjoy and have a blast !
Wednesday, December 19, 2007
Yes Chandrayaan-I, india's first mission to the chanda mama (the moon) is
scheduled for launch in April 9, 2008!!!
Yes the next year this is the mission that we all will be talking about. It
will be a two years mission and Chandrayaan will take 5 days to reach chanda
Saturday, December 15, 2007
The 59th AGM of The Aeronautical Society of India is on
February 1 & 2 , 2008 Organized by The Aeronautical Society
of India, Chennai Branch & Co-Hosted by Department of
Aerospace Engineering, IIT Madras
Venue : IC & SR Auditorium, IIT Madras, Chennai
For more information click here
Friday, December 14, 2007
A couple of weeks back, there were lot of posts on question of flights and aerodynamic design in OURAeSI. At that time, being busy, I couldn't answer them but now I took up the task of answering the ones I can.
But strangely, I think, people who are asking this questions haven't done a little research by themselves on net. Because wikipedia and all the useful resources accessed through the use of Google has all the answers they are searching for...
So folks don't be lazy. Try Google and wikipedia before submitting.
Anyway it’s good that OURAeSI club is being used for the questions. That is encouraging, it seems now not only job seekers but students are flocking to the club and are asking what matters to them the most.
Keep it up guys and also do share about how were the exams. What was good and what went wrong? Just a line and two can begin the discussion. So chip in.
And for the question someone asked about Fuselage Fineness Ratio. So here is what wikipedia has to say.....
Fuselage Fineness Ratio
Fineness ratio is a term used to describe the overall shape of a streamlined body.
Specifically, it is the ratio of the length of a body to its maximum width; shapes that are "short and fat" have a low fineness ratio, those that are "long and skinny" have high fineness ratios.
Aircraft that spend time at supersonic speeds generally have high fineness ratios, an example being the Concorde and missiles.
At speeds below critical mach, one of the primary forms of drag is skin friction. As the name implies, this is drag caused by the interaction of the airflow with the aircraft's skinning. In order to minimize this form of drag, the aircraft should be designed to minimize the exposed skin area, or "wetted surface", which generally implies the fuselage should be somewhat "egg shaped".
As an aircraft approaches the speed of sound, shock waves form on areas of greater curvature. These shock waves radiate away energy that the engines have to supply, energy that does not go into making the aircraft go faster. This appears to be a new form of drag —referred to as wave drag. In order to minimize the magnitude of the wave drag, the curvature of the aircraft should be kept to a minimum, which implies much higher fineness ratios.
Thursday, December 13, 2007
Solidity factor of blade.
Blade solidity factor is the chord length divided by the blade spacing,
Blade spacing is the distance between two similar points on adjacent blades.
The blade having solidity factor less than one facilitates manufacture of the impeller in one piece using a molding process.
The solidity factor is defined as the total blade area of the rotor divided by the swept area normal to the wind. Low solidity factor is highly desirable as a blade with low solidity factor will intercept a large area of wind with a small area of blade.
Turbines with high solidity usually suffer from a large degree of aerodynamic interference between the blades which results in low value of both tip speed ratio and power coefficient (The power coefficient tells you how efficiently a turbine converts the energy.)
Modular jet engines
Modern turbojet engines are modular in concept and design. The central power-producing core, common to all jet engines, is called the gas generator. To it are attached peripheral modules such as propeller reduction gear sets (turboprop/turbo shaft), bypass fans, and afterburners. The kind of peripheral fitted is dependent on the aircraft design application.
An example will be When GE collaborated in end of seventies and eighties with French Snecma on the CFM56 civilian engine build around a hot core of military F110, French had 50% of design work but worked on low pressure part and accessories and were forbidden to look on hot cores provided by GE (HP turbine and combustion chambers).
Wednesday, December 12, 2007
I have scanned AeSI.org. I have googled aesi but there is no mention of AeSI's AGM this time? Does anybody know when the AGM of AeSI is? Last info that I had was that its scheduled in December and the venue was Chennai... Can somebody update me about this.
Last 3 AGM's were well publicized, why is this one so low? Is it because of the impact of the last one? I wonder!!!
Do send your comments...
Tuesday, December 11, 2007
Do you know some man made objects can travel more than 61056 km/h !!! yes you read it right sixty one thousand and fifty six kilometer per hour!!!! This is what Voyager 1 , a spacecraft from NASA is traveling out there in space.
Read more here
Voyager 1's journey is 28's long and is in the final frontier's of our solar system.
Check out some cool images it has sent
Read more about voyager mission at NASA
One quick fact:
The Voyager spacecraft will be the third and fourth human spacecraft to fly beyond all the planets in our solar system. Pioneers 10 and 11 preceded Voyager in outstripping the gravitational attraction of the Sun but on February 17, 1998, Voyager 1 passed Pioneer 10 to become the most distant human-made object in space
Source: NASA Facts
Monday, December 10, 2007
So folks what are your ways of decompressing while preparing for the exams do write back!!!!
Related links for AMAeSI June 2008 exams
After exams what?
Secret of clearing AeSI!
5 tips for studying for exams
6 lessons from last semester
Lessons from propulsion 2 exams
Visit www.aesi.org or http://www.csirwebistad.org/aesi/ for the examination results.
Friday, December 07, 2007
Sorry folks… I know it’s a long delay. Well I was on leave and didn’t have access to the net so couldn’t post anything for this long.
And moreover there were some changes in my life, so that occupied me. But hey this trip has made me realize and see that I can’t leave this blog alone. So I promise that this won’t happen next time.
By the way, lets get into business?
Aesi exams are going on, last semester Aero-1 was the exam that many were stuck, this time its over and from the reviews I got the paper was good and people have done well.
And for the rest of the exams Guys and Gals best of luck!!!
One more thing, since now I am away from aesi from, students perspective, so can someone from Chennai help me document how were the rest of the papers and what is the general mood of the students after getting out of the exams……
It will be a great help. So someone from Chennai… do comment back and tell us how are the exams going on…..