Archive for June, 2009

Lecture Log MEE556-03

Tuesday, June 23rd, 2009

We finished the lecture on divergence of a lifting surface today. The class example was a uniform wing under torsional load.

This week’s homework can be downloaded here. Aeroelasticity Exercise 3: Divergence of a wing.

Lecture Log MEE211-03 & 04

Monday, June 22nd, 2009

These two lectures are bunched together because we basicaly only went through textbook exercises on Force Systems, FBD and Equilibrium.

Homework for this week are Exercise 2: Part 2: Questions 1 and 2.

Wind powered island

Friday, June 19th, 2009

Had a chance to visit the wind farm on Koh Larn the other day with members from the Dept. of Industrial Promotion. For those not familiar with Thailand geography, Koh Larn is an island about 30-minute by boat from the city of Pattaya.

Seriously, I was working. Not on holidays as some might think.

Anyways. Back to work. Here we are on the hills just behind Sa-mae beach (on the South-West part of the island) where the wind is blowing pretty constantly. At least that’s what we felt while standing there. A bunch of small scale low-speed wind turbines cover the side of the hills. Each 4m diameter unit is capable of churning out 4.5kW. Quite an impressive sight.

Unfortunately, precise technical electricity production details are not available. For more information, please read this article. So that is it. We are now heading back to the beach to munch some seafood. Guess what. Another little wind turbine.

After all, good day at work isn’t it.

Lecture Log MEE211-02

Friday, June 19th, 2009

Again. A bit late. We covered the basics of vector calculation and equilibrium conditions. Basicly, the first part of Lecture 2.

The homework for this week is Exercise 2 – Questions 7 and 8.

UPDATE: Solutions for the homework can be found here – Question 7, Question 8.

Lecture Log MEE556-02

Tuesday, June 16th, 2009

We completed the chapter on control reversal. The class example was a 2D 2-DOF aerofoil (pitch and aileron) model. Derivation of reversal dynamic pressure and speed was shown. Finally, we discussed aileron effectiveness and the relationships between reversal dynamic pressure and divergence dynamic pressure.

Homework for this week can be downloaded here. Aeroelasticity Exercise 2: Control Reversal.

Lecture Log MEE556-01

Saturday, June 6th, 2009

This one too. First lecture on aeroelasticity on Tuesday 02/06/09. We covered the following topics

  • Introduction of aeroelasticity – what is this subject all about
  • Description of static aeroelasticity and its applications, ie. divergence and control reversal
  • Basic technical terms in the field of aeronautics

It was still too early for any homework. Should any student have any question, please add them to the comments that follow.

Lecture Log MEE211-01

Saturday, June 6th, 2009

Better late than never. Here’s the lecture log from the first class of the course.

  • Explained basic terms and definitions
  • Reaction forces on different types of support
  • Free body diagram explanation and examples

Homework

  • Free body diagrams

Should anybody have any questions, please post your comments under this post.


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