Sunday, May 20, 2007

hmm... so many of the hostel people are falling sick... ><; It's a miracle that everyone was there on photo taking day... (especially considering the attendence the day before was... alarming... 11 people)
Please take care of yourselves...!

Anyways... some random stuff:


Eraser assembly again




After some doodling
After more doodling



*doodle* *doodle*
masterpieces
more...
revenge....

more doodling
and more...
free for all...
the marker increased in size... didn't it?
yeah... done!
Moral of the story? Don't sleep in lectures (and on class bench XD)


-posted by Anonymous at 6:04 PM

Sunday, May 13, 2007

this time is...really... a memorable experience......

for nearly three weeks, i have been sick or not feeling well...

and it's around my 18th birthday

sigh......

anyway, i hope i've revovered now



now i know




health is everything

no health, means no passion for anything, be it either music, fictions, movies, delicacies

no health, means u'r e poorest, most wretched person in e world


now i know






life is beautiful


friends are important


love is precious


i miss home, my parents...



热爱生活

热情地拥抱生活

sincerely hope life-long health for everyone


e following are some pics taken during these days:





boyang in maths lecture in maths week





huan was occupying my bed and having a nice dream









huasheng ( from 6H) and i were trying to complete a 拼图，given by a good friend

-posted by 07S6K at 9:50 PM

Saturday, May 12, 2007

Hey... *waves*, I hope by now everyone knows that E204 will be under our care =D. So any ideas on the rules and how to spend the $50 (constructively) *AND* decorating the class... D:

-posted by Anonymous at 7:03 PM

Friday, May 4, 2007

After having a short discussion with Mr Lee about aircraft pressurisation while in flight, I think it would be nice to illustrate the point further. Each plane flies at an average of 33 thousand feet, that's about 10km upwards, sometimes more. But the air pressure up there isn't high enough to ensure we get enough oxygen, so the cabin is pressurised to 10 thousand feet, and that is known as the safe altitude. Should anything go wrong with the pressurisation, the pilots descend to that level at 6000+ feet per minute, while oxygen masks supply everyone with 15 mins of emergency 100% pure oxygen, more than enough for the plane to get down. This difference in pressure inside and outside the plane places some stress on the aircraft fuselage. So below is a video, on how much damage a tiny fracture can cause. This is a true incident, and the video is a segment of Air Crash Investigation by National Geographic. Those who have a fear of flying, or think they may get nightmares, or develop a fear of flying after watching are strongly adviced NOT to watch the video. I will not be responsible for counselling you, so watch at your own discretion.

Aloha Flight 243, Boeing 737-100 or -200



Note that near the ending, after the pilots have landed, the way the co-pilot activates the reverse thrust (a whoosh you hear after a plane touches down, formed by directing engine thrust forward to help slow the plane down) is not accurately depicted. You see the co-pilot using the reverser handles to pull the throttles back to idle and the reverser engages as these levers come up. This is not true for an airliner. Firstly, the reverser handles are locked unless the throttles are on idle. Secondly, thrust is reduced to idle latest when the main gear touches down, and reverse thrust is not activated until the nose gear touches down. So what you should have seen is the throttles already at idle, and the co-pilot pulling the reverser handles upwards to engage reverse thrust.

Next is another video from the same series, this one is something most people don't know about. An airplane has a built in automated survival system, which will keep the airplane in the air, should an upset occur. Find out what it is at the end of this next video. What the pilots have to do can be quite surprising. Also, the first part of this video is quite scary for those who do not like disaster documentaries, so once again, watch only if you dare to.

Aeroflot Flight 593 Airbus A310



This is a long flight, so there is a relief crew, thus you see that there is another captain onboard. Anyway, according to current rules, no one is allowed into the cockpit unless they are part of the flight crew, cabin crew serving the flight deck, or riding in the jump seat/instructor seat. The doors are locked and a safety code is need to open it. This is an accident known as CFIT or Controlled Flight Into Terrain, since the plane is perfectly functional, and the crew, having made several severe mistakes, flew the plane into the mountains. The autopilot shutting down is due to the high stress and unusual flight profile, which is out of the envelope of the controls of the AP. Anyway, the angle of tilt or bank you see on the video is made larger. To experience a G force of twice your weight, the aircraft only needs to be 60 degrees away from the horizontal, which is already excessive. You can try proving that using vectors. At the 90 degrees shown, the G forces increases so sharply and the rate of lift loss is so great, the nose will almost certainly plunge downwards immediately.

Anyway, looking all these, you may start to worry about the safety of flying, especially those who have to fly home every year. Actually, you are more likely to get into problems on your way to the airport (ie on the road) than on the plane itself. If you seriously have doubts you want to clarify, you can look for me, and I will try to explain it to you as best as I can.

Yong Lin
Class Aviation Freak

-posted by 07S6K at 10:01 PM

Wednesday, May 2, 2007

I heard Mr Lee insists that we post on the class blog, so here is my little story, which includes both fact and fiction. You can choose to believe it or not. It is not very exciting, and has some technical terms, so do be prepared. But I guess this still counts as a post.
Flight CO3004 took off early as Combined Sports Meet ended earlier than expected, in fact much earlier than expected, so the runway was clear, and all the passengers/crew were all available for the flight. The tower cleared the flight for its rehearsal of the route it would do during SYF on 10th May. The front part of the flight was routine, as each section of the jet rehearsed what it was going to do independently, with the exception of the guanyue section, as they were connected to the flight deck and the chief cabin crew members. XYZ (Xianyue Zu aka bowed strings section) and Tanbo (aka plucked strings) sections were operating in other parts of the jet. Lunch was served at 11.30am, but it took some time for all the people onboard to get back to their stations, so the next phase of the rehearsal was delayed.
Not long into the 2nd phase of the flight rehearsal, the pilot in command (PIC), Yong Lin notices the lights in the flight deck and the cabin behind him going off all together. Immediately, alarms began sounding, and the autopilot disconnected. Checking the announciator panel, our PIC noticed several red warning, requiring immediate crew attention. The jet suffered an AC generator failure, both AC buses were down. Somehow, the generators in the 4 jet engines were not feeding power to the buses and now the jet is running on its batteries. Because of this, the electrically driven hydraulics could not exert their full strength on battery power and not receiving full control of the flight surfaces, the AP disconnected. As the aircraft was trimmed for level flight, there was no major upset of the flight path. The PIC immediately went for the circuit breakers and found his flight engineer T*-A** struggling with the breakers. Guanyue was feeling too cold but didn't know that the air conditioning packs are controlled in the flight deck. Being a member of Guanyue, the T*-A** wanted to help her section mates, and tried to shut off one of air conditioning pack from the breaker panel. Unfortunately, she shut off the Main Current Circuit Breaker, cutting off the power to all the aircraft's systems, leaving the batteries to keep them up and running in a reduced state. As the main breakers must carry high currents, the spring in them are tight, and T*-A** was unable to reset the breaker. With the help of the PIC, AC power was restored and after a few moments of reconfiguration, all systems were back in their original state and the flight continued without trouble.
Flight CO3004 landed safely at 1930 hours. So back to the real world, Mr Lee is currently a couple of hours from home. UA895 is scheduled to land in Singapore at 2330 hours. There are currently no status updates on the flight, so we assume that it is cruising smoothly and happily. Hope you enjoyed this post full of aviation.

Yong Lin

-posted by 07S6K at 9:36 PM



haha..... havent posted in class blog for quite some time liao.... hmmm, i seriously dislike the fact that chem test is only 30 marks =(..... makes every single careless mistake count so much more..... haha...... hopefully can do well XD.... haha........

for spiderman 3, i am definitely going to watch it =)....... but i cant make it on sat afternoon cause need to go and support juniors.... haha.... so it would be better if its on sat night or fri night.........

hmm.... dun think theres much stuff next week.... so hopefully we can have a fruitful and high attendance class outing =)

-posted by HP at 7:58 PM

Tuesday, May 1, 2007

Erps, anyone interested in watching Spiderman 3 this friday/saturday? =)
I couldn't really locate anyone yesterday in the mess/mass so I didn't really get a chance to ask. Let's make it a mini class outing X3 (like celebrating Betty's return :D)

And yay... Mr lee, your 'old stale post' is now all the way at the bottom XD
let's hope someone else post before this one gets stale *lmao*

-posted by Anonymous at 1:24 PM



WARNING: this is an extremely image heavy post, so yeah, good luck if your internet connection is slow/doesn't like you.

And I must apologize for the extremely 'noisy' and grainy photos. Didn't know that the setting I do that ><; (Well, it was a choice between grainy or motion blur)

We found money XD
(beware, the frowning ones are counterfeit notes!)

Busy people...

we were one of the first class to go into the restaurant so it's still pretty empty all around

Michael had the foresight to bring cards XD




No peeking!

The seniors on the next table

The good food XD
look at their plates... (and their happy faces)

Si Yuan: Stupid hand... ><
together at last =P
Eww...




beware of Anne and her pokes
Randomness
I... don't know what's happening there?


A toast to Artemis!
A lost soul

Enthralled
I really really want to know where on earth the english translations came from...
Gu zheng performance

the prince... and.. um... princess (?!)

THE prince and princess!


Parental lessons for the prince and princess
tedious indeed...


The cloth peg punishment... ouch... ><;
Ready... get set...
omg... Wang Lu is ownage!
eating the shelled eggs
Poser =P
The group photo at the end

As most of us noticed already... bunny (aka Wei Quan) was with us on the day... XD Should have taken a photo of the video... was too stunned (and laughing to hard to react)
P.S Who did the other camera belong to? (li nan?) Please post the photos too X3


-posted by Anonymous at 12:44 PM