The day before yesterday, I flew Diamond
DA20 Eclipse. I haven't flown this airplane for almost a year.
This airplane has a fighter-like canopy and a control stick instead of
a control wheel. So, I feel like as if I were flying a military
airplane. I hold the stick with my left hand though. This
airplane has a tendency to turn left on take off (any single-engine
airplane has this tendency, but Eclipse's left-turning tendency is
considerably larger than a Cessna), and taxiing is a bit difficult
because its nose wheel is not connected to the rudder pedals and I'm
left with differential brakes for turning on the ground. This
flight marked my 200th flying hour!
Yesterday, I flew Stage III Check for my instrument rating, and
passed! I'll fly with my instructor for once or twice more and
then go for FAA practical test. I should be instrument rated by
the end of January.
You may have guessed I encountered a horrifying experience while I
was flying. If you did, you got it wrong. My horrifying
experience was far scarier than anything I encountered in the air
(including all my flying time as a student pilot.) The scariest
flying experience I had was when I was a student pilot, I was doing
touch & goes solo, and in one of the touch & goes, I forgot retracting
flaps. I tried to climb and retracted flaps at the same time,
but the airplane sank for a second or two before it climbed again.
Yesterday, after finishing my Stage III Check, I came to my office.
I had an appointment with a student. He was the only student I
saw yesterday. The school was in winter break. I thought I
would not come to the office again until January, and came back home.
I didn't feel like doing any programming, and decided to re-install
Linux because I needed it for compiling the Linux version of YSFLIGHT.
My PC has three hard drives, one for Windows XP, one for Linux, and
one for Windows 98. When I install Linux, I always unplug the
hard drive used by Windows XP so that the Linux installer does not
overwrite master boot record.
However, the Linux installer detected three hard drives. One
hard drive too many. I realized that one of them was an eSATA
external hard drive that I recently added to the system. The
external hard drive anyway did not have boot information. So, I
continued the installation. I thought I chose 40GB hard drive
and let the installer delete partitions of that drive and installed
After the installation, I re-connected the Windows XP drive, and
tried to open my memo of how to configure multi-boot. The memo
was stored in my work drive, which also stored all my source code
(including YSFLIGHT source code), papers, and most of the data files.
However, I couldn't open the memo. Actually, the work drive
itself was missing. I felt a freezing sensation on my back.
I used to be using a Firewire external hard drive as a work drive, and
then changed to a USB2.0 hard drive. So, my work drive was not
visible from the Linux installer before. It was until I started
using an eSATA portable hard drive. My PC had two eSATA drives
connected, one of them was my work drive, and both were visible to the
Linux installer. I suddenly noticed the possibility that I
deleted all the partitions of my work drive by mistake. I'm
taking backups whenever I make a modification to my codes, and I take
whole backup once a month. Unfortunately, the last monthly
backup was taken almost exactly a month ago. I was thinking to
take a new monthly backup within a few days. So, I had to rely
on individual backups to recover my work of nearly 30 days.
Nonetheless, my backup structure saved me before when my work drive
crashed a few years ago. I lost only 8 hours of work, which was
At this time, I didn't know what was waiting for me next.
So, I took out the last monthly-backup DVDs. And then I
logged on to my office PC by the remote-desktop connection to copy
individual backup files to my home PC. What I saw was the
scariest thing I'd ever seen in my life! Or, I should say "What
I didn't see" to be more precise. The backup files were missing!
I got a new PC on my desk recently. But, I apparently forgot to
change the drive configuration so that my backup program can copy
files to the backup directory. My backup program should have
been spitting out error messages, but I was assuming my program was
taking backups in the local hard drive and didn't bother looking at
I lost nearly all the work I did last 30 days
(actually, overwhelmingly busy 30 days)....
I never had anything more horrifying than this before.
Desperately, I started recovering files from my Sent Items folder,
and whatever files I've sent to a student. The biggest loss
seemed to be the paper that I've just submitted. I could recover
the one close to the final version from the e-mail log. But, all
the test data were lost. Last 30 days was incredibly busy 30
days. I may have to do the same to recover all the work....
I called my research advisor and asked him to keep all the files I've
sent him recently.
I made a new partition on the hard drive that was once ruined by
myself. Then copied the files from month-old backup DVDs.
A strange thing happened then. The disk became full before
copying all the files. It was not supposed to become full
because all the files had once been there. I checked the size of
the drive and realized the one I erased was indeed 40GB hard drive.
My work drive was supposed to be 120GB. I unplugged my work
drive from the desktop PC and hooked it to my laptop. To my
relief, all the files were there! It turned out that I didn't
make any mistake when I installed Linux. My work drive was not
visible from Windows XP simply because of the loose connection.
I unplugged the connector and plugged it again and the files became
visible again. It happened at the bad timing that gave me an
impression that I made a terrible mistake. But, it was just a
coincidence. Of course, I took the monthly backup as soon as the
drive was visible again. My horrifying two hours were over.
Actually, I seemed to be very panicking when I was doing a recovery
operation. It turned out that I had configured my new PC
properly, and I found the backup files. So, if the hard drive
did not become full, I would have ended up with making a
nearly-up-to-date copy of my work drive.
In this case, it turned out that I didn't actually deleted my
files. But, it reminded me of the importance of regular backup.
Some students say that hard disk don't crash often and no one will
attack their computer from outside and they have little chance of
losing important files. They don't realize the importance of the
regular backup until they delete their important files by themselves.
I sometimes do a stupid thing and delete important files by myself,
too. Usually, I can recover files from my backup. It is
really important to take backup copies regularly.
The video below is from a cross-country flight to Franklin on
I've just submitted the paper I've been
working on, just in time.
I've been suffering from flu since Tuesday. I had an
appointment for flu shot for Wednesday, so one day too late.
Actually, flu vaccine needs two weeks to take full effect, so, it was
two weeks and one day too late.
My common pattern of cold or flu symptom used to be getting sinus
infection first, and everything was over when the sinus heals.
This time, I got sinus infection first on Tuesday, and it quickly
healed by Wednesday. So, if it fit in a usual pattern, it was
supposed to be over then. But, next came sore throat. I
lost voice, and had to use my laptop to communicate with my wife and
hospital staffs. The pain in the throat was almost over by the
next day, although it was still difficult to speak. So I
expected it to be over soon.
But, I felt chilly. I thought the apartment heating system
was down again, when I realized room temperature gauge was indicating
72F, so I was not supposed to feel chilly. Then I realized I was
having 100F fever. No wonder I had a headache. I had to
stay in bed for a day, and the fever got a lot better by the evening.
I really thought it should be over by the next day.
On Friday, I woke up with even severer throat pain, and my fever
jumped up to 101F. I thought about writing my will. But,
finally the fever receded by Saturday morning. And, I could
submit my paper just in time. It was a tough flu....
12/06/2007 Still in busy mode
So far, I've finished the first version of
the paper due Dec. 4. By the way, the due date was extended to
Dec. 9. As for the project that I was assigned all of a sudden,
I managed to do it in time. It was a close shave.
And, I flew a long cross country that is required for Instrument
Rating (finally!) I flew from Allegheny County -> Erie
International -> Cleveland Burke Lakefront and came back. It was
about four-hour flight, and my right hand holding the throttle lever
started hurting toward the end. It was the second longest flight
I've ever flown in one day. I'll go for the Stage 3 check next
Sunday, and then FAA's check ride.
So, in a few days I expect I can resume updating this web site more
often. A lot of things are back-logged, including photos from
Columbus air show, my first solo night flight (since solo night flight
was not required for Private certificate, I had never flown solo at
night before recently), and YSFLIGHT testing (of course). So,
please wait for a few more days. By the way, I'm not tired of
bird photography. I simply could not aim at the bird through
tree leaves during summer. Now the tree leaves are gone, and I
should be able to have chance to get nice shot of birds again.
11/10/2007 Sorry for no update for a while
I was hoping I could update YSFLIGHT Test
version more often, but I got a new project to engage on top of things
I've been doing, and I decided to write a paper to a conference due
12/04, and I'm pretty much overwhelmed now. I was expecting I
would have some spare time after the conference in October, but the
things didn't turn out that way.
Nonetheless, I passed the written exam (CATS test) for Airplane
Instrument Rating this Wednesday. One long cross-country, Stage
3 Check, to go. After these flights, maybe I'll have one or two
practice flights, and then go for FAA Practical Test for Instrument
Rating. Hopefully I'll be instrument rated by the end of this
year, but the weather is not certainly cooperative in these days.
The weather this year in Pittsburgh was incredibly nice until last
month. I had few flight cancellations, and my Instrument
training went rapidly, but finally the winter weather casts a shadow
over Pittsburgh region. I hope I can go for a long cross-country
tomorrow, but the forecast is depressing, predicting rain and snow.
10/20/2007 Starting YSFLIGHT Test Phase
Test version is now available. I will not post an updates of
the test version here unless there is a big change. So, please
see the test-version page for update information from now on.
10/07/2007 Passed IFR Stage 2 Check!
I passed the IFR-Stage-2 check ride
yesterday! The examiner told that it was excellent, rock solid,
and "the best check ride he had ever given. Actually I made some
small mistakes, so I was a bit surprised to hear his comment.
I proceed to Stage 3, which consists of four cross-country IFR
flights before stage check. I have to fly minimum of those four
cross-country flights and stage check, then go for the FAA check ride
(final exam of IFR training) to be instrument rated. In reality,
I expect to fly one or two extra flights before going for stage check
and FAA check ride. So, probably I will go for the final exam
late November. (Please read
CaptainYS's Flight Logbook for more details.)
10/03/2007 Close Encounter of the F-22 Raptor!
I visited Columbus Air Show "The Gathering of Mustangs and
Legends." Finally I had an opportunity to see F-22. I was
suspecting that F-22 does not really exist, and the ones deployed to
Okinawa were actually F-15s with special outfits (just joking!) but
now I know it really exists. The flight demonstration of a F-22,
including a lot of post-stall maneuvers, were nothing but impressive.
I'll upload photos in
Airplane Photo Gallery in a few days.
By the way, I clearly saw a sheet metal part fell off from the F-22
soon after taking off. I've been curious if it was ok.
Photos didn't reveal any missing part, but I clearly saw something
pretty big fell off.
I'm going to try Stage II check flight of my instrument training
this Saturday. If I pass, I will proceed to the Stage III (final
stage.) I'll post the result here and
CaptainYS's Flight Logbook.
I've been practicing instrument flying, and
was not practicing landing as much as before. I was feeling my
landing skill was getting rusty. The instructor told it is
normal and it is ok as long as I can land safely. Nonetheless, I
didn't want to let my landing skill rust through my instrument
training. So, I did some touch & goes yesterday. The
environment was still bright when I took off, but toward the end, it
got dark, and I landed into the beautiful runway illumination.
I'll upload details later, but I uploaded the video of almost-night
landing. By regulation, it was not considered a night landing
because it was before one hour after sunset.
I'm serving as an organizing committee of a
conference called International Meshing Roundtable this year and the
next year. I'm in Seattle right now for a committee meeting.
The meeting is actually tomorrow, but I left Pittsburgh early in the
morning and came to Seattle early to visit
the Museum of Flight.
The Museum of Flight is located right next to the Boeing-Field
airport, and it is one of the three biggest (I believe) air museums of
the U.S. The other two are the Smithsonian Air and Space museum
at Washington D.C. and the Air Force Museum at Dayton OH.
The museum of flight is keeping Concorde G-BOAG. I hope they are
taking good care of it. I'll upload more details when I am back
in Pittsburgh. For now, I upload one picture of G-BOAG.
The weather was perfect for flying except the wind today. Low
humidity, high visibility, and few clouds. I flew my 11th flying
lesson of Instrument Training today, but I could not enjoy the nice
visibility because I was wearing a foggle :-P
06/19/2007 Uploaded Photos from the Wings Over
Pittsburgh air show
I flew as a safety pilot for my instructor's
practice flight today. He did one approach to Pittsburgh
International Airport. The
Wings Over Pittsburgh air
show is going to come this weekend, and I had a rare opportunity
to see Thunderbirds F-16s and a B-52 parked in the air-show area from
the air. I only had my compact digital camera, and I couldn't
capture a clear picture, but at least they were visible on the
picture. I have uploaded more details in in
CaptainYS's Flight Log Book.
06/07/2007 IFR Flight Training Update
This page has been like a bird-watching web
site for a while, but I've been doing my Instrument training
simultaneously. I've uploaded some updates of my Instrument
CaptainYS's Flight Log Book.
06/03/2007 Modifying Site Structure
I had been using frames in this site, but I'm changing it to inline
frames. I'm gradually updating the pages. But you may see
some glitches during the transition. I'll try to finish the
transition as soon as possible. Thank you for your patience.
And, I'm going to move all the contents in Prodigy web server
(under pages.prodigy.net) to @Nifty server (under homepage3.nifty.com)
in a few days. So, if you are keeping a direct link to some
pages of this site stored in the Prodigy web server, please keep a
link to http://www.ysflight.com
the way, I post one picture showing the strength of K100D's shake
reduction feature. This photo was taken with 500mm telephoto
lens under poor lighting condition. The shutter speed was 1/60
second. This crisp picture was impossible in this condition
without shake reduction.
06/01/2007 Pentax K100D
I'm frequently updating
Birds (and Animals) Around
Carnegie Mellon and uploading pictures of growing Blue Jay chicks.
They are growing feathers, and signature blue and white pattern of the
wings is becoming more visible.
By the way, I purchased a new digital SLR, Pentax K100D. My
first SLR camera happened to be manufactured by Pentax; my father
bought me a Pentax SFX and 300mm telephoto lens when I was a
high-school student. Since then, I've been a loyal customer of
Pentax. Most of my airplane-fan friends chose Canon digital SLRs,
but I'm sticking with Pentax cameras. When I was using film
cameras, I was using Z-1P as a primary camera, and ZX-L as a backup
camera. However, there were two tragic incidents that made me
decide to switch to digital SLR. First, a local photo shop
returned my slides from Concorde-photo-taking tour with full of
fingerprints. I cursed the photo shop, and the shop went out of
business in two years. (My curse apparently worked!) So I
started using Kodak slide developing service, but probably a Kodak
employee screwed up the setting of slide-developing machine, and
destroyed my slides from Cleveland air show. I had enough.
The film-photo era is over. I decided to switch to a digital SLR
I didn't have budget to get a body and a telephoto lens together.
So, my choice was Pentax *ist DS2 digital-SLR camera. My *ist
DS2 gave me an impressive shot in the first try. When I visited
Matsushima air base in Japan, just a week after I purchased my *ist
DS2, I got
my best shot of T-4 Blue Impulse. Later at the Tokyo Haneda
International airport, a sparrow hopped close to me when I was aiming
at airliners. So, I just aimed at the sparrow and took a photo.
It was supposed to be a non-serious shot, but I was impressed by the
quality of the picture; I could see fibers of the feather of
the sparrow. I was thinking that this high-quality picture
could only be taken with a professional-grade camera with a price tag
or over $10,000.
From left to
right, K100D, *ist DS2, and *ist DL.
Couple of months later, I purchased *ist DL as a backup camera.
*ist DL was a cheaper version, and the specification was slightly
lower than *ist DS2. My plan was to use *ist DS2 primarily, and
use *ist DL when I needed to send *ist DS2 to a service center for
maintenance. But, I didn't want to keep *ist DL unused, so I
started carrying it all the time with 170-500mm telephoto lens
attached, and began bird watching. It turned out that bird
watching is as much fun as air-show photo taking. In fact,
taking photos of birds is more challenging than taking photos of
airplanes in an air show. I can expect what to come next in an
air show by listening to the announcement and air-band radio.
But, I cannot expect what a bird will do next. Also, wild birds
like to stay in a shade, and I often cannot use faster shutter speed
due to inadequate lighting condition.
So, I wanted to have a camera with shake reduction feature.
But, I didn't have budget to buy a digital SLR body and a telephoto
lens together. So, my choices were Pentax K10D and K100D.
Both K100D and K10D has shake reduction feature, and auto-focus is
much faster than older Pentax cameras. K100D is cheaper and can
use AA batteries. K10D has dust reduction feature, and has
10M-pixel CCD as opposed to 6M-pixel CCD of K10D. But, K10D uses
a special battery. It means that when I go for a long trip (like
visiting Japan), I need to carry its battery charger. Carrying a
battery charger is a big pain especially for such a long trip.
So, my decision was K100D.
I received my K100D yesterday, and started using it for taking
pictures of the Blue Jay nest that I've been watching. I was
impressed by the effect of the shake reduction. In one case, I
captured a perfectly crisp picture with 500mm telephoto lens and 1/60
second shutter speed (without tripod, of course.) Of course,
shake reduction is not always perfect. It works only when I am
standing steadily and the target is not too high up above. If I
have to aim at a bird perched at a high branch or I could not stand
steadily for some reason, shake reduction feature cannot correct the
image. Nonetheless, getting a crisp picture with 500mm lens +
1/60 second shutter speed without tripod even in an ideal condition
was totally impossible before. Another advantage of the shake
reduction feature of K10D/K100D is that it works with virtually all
Pentax-compatible lenses. Some other digital-SLR cameras have
similar feature, but those models have restrictions, like shake
reduction works only with new lenses, or you need to buy a lens that
has shake reduction functionality in it. As far as I surveyed,
K10D/K100D are only cameras that can use shake reduction with almost
all existing compatible lenses. And the speed of auto-focus has
considerably improved from *ist DS2. Now it is comparable to
Z-1P. So far, I'm very happy with my new K100D. Pittsburgh
air show is coming soon. So, I'll use both *ist DS2 and K100D
and compare the outcomes.
I was planning to run YSFLIGHT server during the Memorial day
weekend, but I forgot starting the server. Sorry. Now the
server is up and running. Please see
details (including IP address.).
05/15/2007 Photos from Matsushima Air Base, Tokyo
Haneda Int'l Airport, and Iruma Air Base
I have visited Matsushima Air Base, Tokyo
Haneda International Airport, and Iruma Air Base. I have
uploaded some of the pictures from the trips. I'll write more
details when I come back to Pittsburgh.
05/02/2007 On Vacation (Sort of)
I'll stay in Japan for 20 days. I'm
writing this text in the airplane to Japan. (I'm uploading it
from the hotel though.) The main purpose of the trip is to renew
my Japanese driver's license. Unlike U.S., getting a driver's
license in Japan is a hassle. In general, you need to sign up
for a driving school, and take driving lessons, and pass the series of
written and practical tests, as opposed to a single written test and
an easy practical test. I probably do not need a Japanese
driver's license in the near future, but just in case, I don't want to
During the trip, I'll use this opportunity to visit some companies
that we are working with. So, it is partly a business trip, too.
I need to prepare for the Power Point presentation in a few days.
I'll also spend one and half days at Matsushima Air Base taking
photos of airplanes, and hopefully one day at Iruma or Atsugi Air
Base, too. I'll upload photos here if I succeed in taking good
By the way, one of the two Blue-Jay nests in the Flag Staff Hill
was not actually destroyed by the storm. (Please see
Animals) Around Carnegie Mellon.) I could see a bird
brooding. So, eggs must hatch by the time I return to
Pittsburgh. I'm hoping I can come back in time to see parent
birds feeding their kids.
I'll upload some articles here if there's something interesting
during the trip.
A Blue Jay brooding on its nest
I will keep my YSFLIGHT server up during
Japnese long holiday (called Golden Week) until May 6th. Click
By the way,
YSFLIGHT 20070415 version for Linux is also now online!
04/23/2007 YSFLIGHT 20070415 Version Available for
20070415 version is now online! Click
download. (Linux version is not ready yet. Will be
I flew a cross-country flight to Port Meadville Airport (KGKJ).
The weather around Pittsburgh was very nice this weekend. The
sky was clear everywhere, and no strong wind was reported.
Details of the flight is in CaptainYS's
Flight Log Book.
By the way, I started using a video sharing system provided by
which is something similar to YouTube. If the service works
well, I will use this service from now on. This way I can upload
a little longer video clips without worrying about my web storage.
If you have ever played an older version of
Microsoft Flight Simulator, like Microsoft Flight Simulator 98, you
might remember the default airport that you saw when you started the
program. The airport was on a lake, and if you took off from the
default location, you must have seen a stadium on your rear left.
An airship was floating 24/7 above the stadium. The airport was
called Meigs Field. My flight instructor told that he often flew
in to Meigs Field with his family for visiting museums.
Actually, the museums of Chicago were within walking distance from the
airport, and many pilots loved the airport.
Meigs Field, however, no longer exist. Several years ago,
Chicago mayor decided to close the airport in spite of opposition from
so many pilots. In fact, he did it in a bad way. He
essentially did a surprise attack against the airport. He
secretly brought in heavy machineries to the airport at night with no
prior notice and destroyed the airport. The airplanes parked at
the airport were stranded because the runway was no longer usable.
Actually, the city of Chicago not only lost a beloved airport, but
received a tremendous economical damage. See
AOPA news for more details.
I was in Chicago last week. I took this opportunity and
visited the place where Meigs Field used to be. Runway pavement
has already completely taken away apparently. Only sign of Meigs
Field I could find was the control tower building, which I guess will
be destroyed soon. Meigs Field was not out of reach for a day
trip from Allegheny County Airport (if I left early) by a Cessna.
I regret I did not have an opportunity to fly in to this airport.
I flew a cross-country flight to Dubois (KDUJ).
Now I have 38 hours of cross-country flying time as a
Pilot-In-Command. For instrument rating, I need 50 hours of
cross-country time as a Pilot-In-Command, and roughly 10 hours of them
will be earned during the instrument training. So, I need to do
two more hours by myself before I go for the instrument check-ride,
which will be months away. I'm planning to fly some
cross-country flights anyway, so I'll have more than enough
cross-country time by then. You can read more details in
CaptainYS's Flight Log Book.
Below is the video from the landing at Dubois (Click to play.)
I was almost giving up my poor car since the
body shop guy told me that he might not be able to save it.
However, it was raised from death. According to the body shop
guy, some piece of rubber (?) was sticking around the shaft of the
engine and preventing the engine from turning. The reaction of
the engine seemed to him similar to the symptom of a burnt engine.
So, my poor car is working now, but it is certainly different from
before the trouble. First of all, it is illuminating the
Check-Engine light brightly. The Check-Engine light came on
occasionally before, so I'm not too concerned about it. But, I
do not hear the beep that I'm supposed to hear when I shut down the
engine. Maybe the self-diagnostic system is detecting something
So, although my car is alive again, I suppose the car will not
survive another year, so I continue shopping for a new car. A
good news for me is that I have some more time to select a vehicle.
I need to think about loan payment as well as insurance cost. I
should visit two or three different dealers also. The top
candidate right now is Honda Fit. My office is pretty close to
my apartment, and mostly I drive to a near shopping mall and Allegheny
County Airport which is only 20 minutes drive from my apartment.
A small car is adequate for me.
Because I have a transportation to go to Allegheny County Airport,
I'll try again a cross-country flight that I had to cancel last week
on Sunday. The forecasted weather looks good. The
temperature is high enough and I don't need to worry about the
airframe icing. That will be a pleasant flight.
By the way, my car apparently is totally dead. The body shop
guy asked me if I ran the engine with excessively high temperature.
It implied that the engine was overheating. After I heard that
metallic noise, I was paying attention to the instruments, but the
temperature gauge was normal. It is strange if the engine was
burnt while the coolant temperature was normal. If it was true,
the cooling system must have had a serious malfunction. Then,
the alternator belt was burnt and torn? There was no smoke
coming out from the engine compartment though.
Although he told me that he needed to do more tests, he said it is
likely that the engine was somehow severely damaged. My crap
apparently became truly a crap. Anyways, I had enough of that
car. Maybe it's time to get a new one. After the
calculation, I came to the conclusion that I must be able to finance
both my IFR training and a new vehicle. I started shopping for a
I'm working for the Department of Mechanical
Engineering at Carnegie Mellon University. But, due to high
parking fee, I park about 15 minutes away from the campus, and walk to
my office. During that 15 minutes, I carry my digital SLR and
take photo of birds. I made some good photos available from
Birds (and Animals) Around
Carnegie Mellon. The web site is also accessible from the
By the way, my car broke down (again.) When I drove down the
slope of Morrowfield avenue beside my apartment building, I heard a
metallic noise, a noise of hitting some metal. Following the
noise, I heard a squealing noise from the engine compartment, which
implied some sort of belt is torn. As I expected, I soon saw the
battery warning light. Luckily, I was close to the body shop
that I'm usually using. Without hesitation, I headed to the body
shop. After driving one block, when I came to right beside the
body shop, my car stopped dead. My battery was gone.
It turned out that the alternator belt was torn.
At least I was lucky because I could drive to the body shop.
However, I had to cancel a cross-country flight planned for tomorrow.
This car has been giving me agony since I purchased this car. I
want to get a new one, but with my income, it's not possible unless I
stop my flight training (and stopping flight training is not my
03/09/2007 Sunset Landing
The weather in Pittsburgh was too good
today. I couldn't resist my temptation and went flying.
You can read more details in CaptainYS's
Flight Log Book. You can see the video from the flight by
clicking the below picture. Since the sun was almost behind me,
the shadow of my airplane is projected on the runway, and looks as if
another airplane was coming toward me.
03/08/2007 Start IFR Training!
I have started flight training toward
instrument rating. I uploaded brief description of the first
lesson in CaptainYS's Flight Log Book.
The following picture is a thing called "foggle" that hides the upper
half view. I wear a foggle in instrument training so that I
cannot see outside the airplane.
02/16/2007 YSFLIGHT Test Version Available for
YSFLIGHT test version toward the next
upgrade is available for download from the
Test-Version page. If you find any bugs or problems, please
let me know by E-Mail. Thank you very much for your help in
testing the YSFLIGHT program!
02/01/2007 Cross-Country Flight to Harrison County
The weather allowed me to fly finally.
I flew to Harrison County Airport yesterday. Below is the video
from the flight. You can read an article of the flight in
CaptainYS's Flight Log Book.
Video (Click to Play)
01/24/2007 Three flight cancellations in a row
I was supposed to fly with an instructor on
last Saturday, but I had to cancel due to gusty wind, low cloud, and
poor braking condition on the runway due to patchy ice and snow.
I tried to do some touch & goes on Sunday, but again bad weather
grounded me. I tried again this morning. In fact, the
forecast, when I checked yesterday, implied that relatively clear
weather. However, the forecast changed this morning, and
predicted occasional 1 mile visibility, light snow + mist, ceiling
1000ft overcast, and icing below 12000ft. Deadly airframe icing
occurs when the temperature is below freezing in visible moisture.
Flying into this condition was suicidal. Bad enough. I
cancelled this one, too. The weather in Pittsburgh is always
like this during winter. I hope I can fly again soon.
By the way, here's the status of the YSFLIGHT development. I
have implemented send-and-read-back mechanism, and did some
experiments by connecting to my office PC from home. It looks
working pretty well. I have received an E-Mail from a user
saying that TCP/IP includes such read-back feature already, so it may
be redundant to add such a mechanism on top of TCP/IP. I really
appreciated an important suggestion. However, send-and-read-back
mechanism is useful when some packets need to be processed in a
specific order. Is two packets are order sensitive, the server
can wait to send the second packet until receiving a confirmation of
the first packet from the client. Otherwise, the order of the
packet arrival can be totally random. So, I'm thinking to go
with this mechanism from now on. Other changes will include
server welcome message, IP address blocking, sending chat message in
the observer mode, etc. (Don't expect major additions, though.)
01/07/2007 Uploaded Honolulu Flight Article
I have uploaded an article about the
around-the-Oahu flights in CaptainYS's
Flight Log Book. Below are another two videos from the
By the way, I finally could take time to modify YSFLIGHT code.
The focus of the next upgrade is to stabilize the network mode, and I
probably will not add many new features. The network code of
YSFLIGHT was heavily depending on the stability of TCP/IP protocol,
and it was easily screwed up when a packet is lost in transaction.
I'm going to make the next version program to read back important
information so that no such information is lost. It's mimicking
ATC-Pilot communication that an ATC or a pilot reads back what is said
on the radio to prevent a catastrophic miscommunication. I guess
such a technique is written in a networking textbook, but I cannot
take time to systematically study such a networking techniques, and I
end up with studying such techniques by trial and errors.
Nonetheless, the YSFLIGHT development is always a good learning
opportunity for me because I wouldn't have an opportunity to learn
such a technique at all if I didn't write the YSFLIGHT networking
01/03/2007 First Flight of the Year
I flew my first flight of the year today.
The air was very smooth at the cruising altitude of 3500ft. But,
when I came close to the airport, the air suddenly became bumpy.
I was shaken quite a bit. I logged 1.8 hours of cross-country
By the way, I encoded videos from my flight in Hawaii. I made
two of them available from the following link. I'll upload four
more when I write more details about the flight.