Archive for January, 2009

Could Flight 1549 Have Landed at La Guardia instead of in the Hudson River?

Monday, January 26th, 2009

Update: Video Re-enactment by Scene Systems.

It will take a year for the NTSB to do a full investigation of Flight 1549, and I’m sure many recommendations will be made about airport birds, ditching airliners and things we haven’t even thought of yet.

In the meantime, so far I’ve heard about 5 issues to ponder …

1) After looking at a few Google maps overlayed with Flightaware data for Flight 1549 that landed in the Hudson River, maybe it could have landed back at La Guardia, instead of in an icy river, if landing gear could be extended:


Flight 1549 Ground Track
Flight 1549 Ground Track Google Mashup by Avweb

Another “Powered by Google” Map
FlightAware Live Flight Track Log (AWE1549)

La Guardia’s elevation is about 21′. The engines failed at about 3,200′. The best glide ratio for an airliner is between 12 and 20 to 1, depending on model and configuration.

It looks like range was not a problem, although one would have to look at a current New York sectional map to see what obstructions would be in various flight paths.

KLGA Sectional Chart ApproximationAccording to the sectional I found online, turning right after engine failure would have resulted in no obstructions.

ATC instructed the plane to turn left and the plane complied. I have a feeling from reading and listening to the transcript that more urgency doing a turnback would have resulted in a landing at LGA, if landing gear could be extended.

2) Dick Rutan made the following observation in a letter to avweb.com: “[All the major news outlets] missed the big story that there were not enough rafts. Remember the Titanic. Had this not been in the river, 80% of passengers would have died in the cold water. How many rafts? Enough for all the passengers? There were a few on a raft and the rest on the wing.”

I have heard that rafts have been removed from many airliners to save weight, hence fuel and operating costs.

3) Also, a news report on the web said the A320 “ditch switch” had not been activated, thus allowing more water than necessary to enter the plane.

4) Would it be possible to shroud the engines with a 1 cm grille with sharpened facing dividers to cube the incoming birds?

5) How does a complete engine failure due to birds on a twin affect ETOPS operations over an ocean? Could the engines be damaged on take-off, then suddenly fail at altitude?

METAR weather observations around that time (the event happened on Jan. 15, 2009 at 3:30 pm EST, which is 2030Z) are available for KJFK and KLGA.

METAR KJFK 151951Z 33010KT 10SM BKN034 BKN055 M07/M14 A3024 RMK AO2 SLP238 T10671144
METAR KLGA 151951Z 34013KT 10SM BKN035 M06/M14 A3022 RMK AO2 SLP234 T10611139

Random comments about Flight 1549 on another blog
wikipedia: Gimli Glider
wikipedia: US Airways Flight 1549
avweb: US Airways Ditching Fallout Hits American With Rafts
avweb: Flight 1549, The Online Game?
avweb: Radio transcript and audio
youtube: Radio Scanner of the first 5 mins of US Airways Flight 1549 crash in the Hudson River
cnn.com: Flight 1549 crew: Hudson landing still on our minds
AP: Sully: Sex life better after Hudson landing

(Disclaimer: I hold a FAA commercial airplane license and have flown many ocean flights around Hawaii and Florida, but do not have any airline experience.)

Moore’s Law and Glass Panel Avionics

Sunday, January 25th, 2009

As LCD and GPS display technologies get further commoditized in the consumer display and mapping markets, those technologies are trickling down to the aviation world in the form of lower-cost, higher-capability avionics displays – now including synthetic vision..

10 years ago, glass panels were only available in airliners and cost $2+ million.

Last year, Cirrus and Cessna trainers offered glass panels for about $100,000, included in the price of a new plane.

In 2009, a glass panel is now $10,000 for experimental and LSA (under 1,320 pounds) aircraft:
avweb.com: Garmin Displays Non-Certified Glass


Garmin GDU375

We’re now at the point where installing the glass panel, testing and doing the Form 337 for IFR will cost more than the equipment does.

Just as with notebook computers, it will be cheaper to replace an avionics display than to troubleshoot and fix it.

One mfg. is actually selling a glass panel version of their aircraft for $10,000 less than a round-gauge model:
avweb.com: Gobosh Discounts Glass

It seems like the Avidyne MFDs have a poor MTBF and maintenance turnaround time record, while Garmins are both reliable and well-supported. Eclipse blamed Avidyne for their slow FAA certification time, and Cirrus has switched to Garmin recently.

One disadvantage of glass panels in general is that navaid, terrain and weather data updates can be $1,300/year or more, plus the regular cost of paper charts. Also, some avionics will not allow display of outdated data, making them less useful in case of an emergency.

Adding synthetic terrain can cost $10,000.

Year Vendor Model Resolution Softkeys Navaids Terrain Weather Notes
King KMD-150 5″ Yes
King KMD-250 3.8″ Yes
King KMD-550 5″ Yes
King KMD-850 5″ Yes 550 plus radar display.
2009 King KSN 770 5.7″ (640×480) Yes Announced
2009 King Av8or Horizon 3D 5″ Yes
2009 King Av8or Vision 3D 5″ Yes Announced
2009 King KFD 840 8.4″ Yes Announced
Avidyne EX500 5.5″ Yes
Avidyne EX5000 10.4″ Yes
Apollo/UPS/Garmin GNS 480 6″ (320×240, 256-color) Yes Good IFR flow but discontinued
Apollo/UPS/Garmin MX20 6″ (640×480) Yes
Garmin GMX 200 5″ (640×480) Yes
Garmin GNS 430 3.5″ (128×240, 16-color) No
Garmin GNS 530 5″ (320×234, 8-color) No
Garmin G1000 10″ or 12″ Yes
2008 Garmin G600 2×6.5″ Yes $30,000 Retrofit for 6-packs
Sandel SN3500 3″ No
2009 Garmin 696 7″ (480×800) Yes Yes Yes Yes MFD, GPS, daylight viewable, XM, SD, USB

From a technology standpoint glass panel progress is amazing. From an airmanship standpoint, not so much…

Pilots are likely to spend more time programming their avionics than looking outside the window to “see and avoid”, which needs to be addressed in pilot training courses, and perhaps ratings.

Interesting quote from Frank Robinson …

“The R66 will not be fitted with a glass cockpit, says Robinson: the manufacturer says that this sort of thing would be inappropriate in a VFR machine. ‘I’m not interested in anything that distracts the pilot from keeping his eyes outside the cockpit,’ says Robinson, implying that once such systems could provide everything that a pilot needed at a glance, they would be considered.”

Ironically, Microsoft lays off the whole FlightSim team:
gamasutra: Microsoft Makes Big Cuts At Flight Sim Studio

avweb: GPS — From VFR to IFR
Avidyne versus Garmin G1000 glass cockpits
AirGizmos.com Panel Mounts for Portable GPS
Garmin Flight Deck Aviation Products

IMUG Meeting: Smartphones and Social Networking in the US and China

Thursday, January 15th, 2009

Dave Weir and Brian Zhou of ExtendLogic talked about social networking and mobile software development in China at IMUG tonite.

ExtendLogic offers outsourced software development services with Chinese programmers.

Currently, there are several massive Chinese social networks. Although they may borrow some UI elements from US sites, US sites have little presence in China.

Some of the reasons are that the Chinese sites are more culturally attuned, local servers, better local mobile support, and may offer better integration with “media downloads.”

Business model seems to be pay for template upgrades, and offline ecommerce, rather than direct purchasing of physical goods on the site. Likely that is because of limited credit card penetration.

I asked if there was a special icon for Party membership and the answer was no. :)

Thanks again to Apple for hosting.

SSD Product and Review Links

Saturday, January 10th, 2009

Intel SSD
This is a note containing links on the general topic of low-cost SSD products and reviews for server use and will evolve over time.

Note that there are numerous problems with enterprise server use of notebook flash SSDs, that hopefully will be resolved by 2012:

  1. not yet hot-swappable
  2. limited lifespan, MLC even moreso than SLC
  3. relatively untested under continuous load or in harsh electrical environments, like data centers.
  4. lack of software, such as production-ready OS drivers and mgmt. tools, such as an online defragmentation utility
  5. cost per TB

Canned Google Search
cnet.com: SSD News Posts

2008
Kevin Burton’s New Feedblog

Sept, 2008
anandtech: Intel X25-M SSD: Intel Delivers One of the World’s Fastest Drives
tomshardware: Intel’s X25-M Solid State Drive Reviewed : Intel’s First Flash SSD Ready for Vertical Take-Off

Oct, 2008
cnet.com: Intel X-25M solid-state drive (80GB)

Nov, 2008
2008 Disk Performance, by Tim Bray, Sun

Dec, 2008
bit-tech.net: G.Skill, Intel X25-M & Patriot SSD group test
theinquirer.net: Toshiba announces the first 512GB SSD

Jan, 2009
cnet.com: Buyer beware: Solid-state drive prices vary–a lot
legionhardware.com: G.Skill Titan SSD 128GB
techreport: A Look at 4 X25-E Extreme SSDs in RAID

Feb, 2009
cnet: Intel solid-state drive price cuts enough?
pcperspective.com: Long-term performance analysis of Intel Mainstream SSDs
theregister: Intel refutes SSD slowdown accusation
Ted Tso: Aligning filesystems to an SSD’s erase block size

March, 2009
wsj: Sun, Rivals Seek New Uses for Flash-Based Storage
cnet.com: Fusion-io touts ‘fastest’ solid-state drive
anandtech.com: SSD versus Enterprise SAS and SATA disks
MySQL Performance Blog: SSD, XFS, LVM, fsync, write cache, barrier and lost transactions

April, 2009
pcper.com: Intel Responds to Fragmentation with New X25-M Firmware
James Hamilton: SSD versus Enterprise SATA and SAS disks

May, 2009
Computerworld: Analysis: SSD performance — is a slowdown inevitable?

June, 2009
storagemojo.com: Outrageously cool new hard drive
pcper.com: Indilinx based OCZ Vertex and Super Talent UltraDrive ME SSDs Reviewed, TRIM comments
OCZ Support Forums: Summit FW Upgrade?

July, 2009
Solid-State Drive Benchmarks and the Write Cache

Oct, 2009
intel forums: Limited write (erase) cycles
blog.fastmail.fm: The state of SSD storage for a database server

Nov, 2009
theregister: Brace of Intel SSDs imminent
theinquirer.net: One Terabyte SSD hits the shops

Dec, 2009
theregister.co.uk: Say hello to Seagate’s Pulsar SSD

Resources

StorageMojo Blog
StorageSearch.com
WD VelociRaptor
Western Digital RE4-GP 2TB Review: Big Green Gets Meaner!
blogs.sun.com: MySQL Performance on Sun Storage 7000
MySQLConf 09: Don MacAskill, “The SmugMug Tale”
enterprisestorageforum.com: Solid-State Drives Tag Index

Keywords: ssd, review, performance, linux, intel, velociraptor

Travelling with the Acer Aspire One Netbook

Tuesday, January 6th, 2009

Acer Aspire One NetbookBefore my trip to Bali, I decided to buy a Acer Aspire One ZG5 Netbook at Fry’s for $349+tax, and use that instead of my usual 15″ (and 5.5 pounds) notebook.

The netbook model was white, ran Windows XP Home, and came with 1 GB RAM and a 160 GB hard drive, though advertised as 120 GB. It weighs in at a mere 2 pounds. It came with a free leatherette form-fitting case, no handle, and a foamy screen protector.

It seemed a little sluggish initially, likely due to its Atom N270 CPU and integrated graphics, so I selected 16-bit video instead of the default 32-bit. Fixed.

The pre-installed XP Home operating system comes with Microsoft Office 2007 Trial and Intervideo, but almost no spyware. (I believe this was because Acer wanted to avoid slowing down the limited CPU and RAM and causing store returns.) Because there’s no CD or DVD drive included, there is an i386 directory containing the .CAB and driver files.

The computer case is too small to fit a DVD drive. I have tried it with both a USB LG-brand exernal drive, as well as a generic Chinese model, and they both worked fine.

How well did the netbook work out for travelling?

Awesome … solidly-built, jewel-like, razor-sharp display, and locks onto all wifi signals I tried.

At 2 pounds, able to be carried everywhere effortlessly – no back injuries when getting in and out of taxis and planes for 2 weeks.

As a bonus … it inspired lust in everybody who saw it.

I don’t know how many times I heard, “on your next trip, please bring me one and I’ll pay you for it.”

Update 2009-01-31: Fry’s is dumping the brown version for $299.99+tax. It does not include the free case. Other retailers also are offering $299 for various colors.

Trip to Bali and Lombok

Tuesday, January 6th, 2009

I vacationed almost 2 weeks in Indonesia, arriving via Jakarta, but staying mainly in Bali with a day-long trip to Lombok.

Getting There

The flight there on Cathay Pacific from SFO was remarkable in that we head strong headwinds, so had to refuel in Taipei before the stopover in HK.

I imagine many of the passengers were annoyed since their final destination was actually Taipei, but were not allowed to actually disembark during the refueling. So they had to fly on to HK, then back to Taipei.

The refuelling stop meant that I was short on time for my transit in HK, so I requested a seat near an exit, and the stewardess was kind enough to move me to first class half an hour before landing. Thus I made the connecting flight to Jakarta.

Kuta

Arriving in Bali after a flight on Garuda from Jakarta ($110), the Kuta area was busier than I have ever seen it, with hotels sold out.

I was booked at the Bounty Hotel for 2 nights ($60/nite), then had to hit the pavement to find another hotel.

The Bounty is the wildest hotel I have ever stayed in, and deliberately so. There motto is, “For the young at heart.”

It caters to drunken Aussie partiers, male and female, who party day and night in and around the 2 swimming pools. Each Friday nite there is a rock concert on the hotel grounds. The holiday season lobby mascot is a life-size, hungover Santa Claus holding a beer bottle. Definitely recommended to those who want to have a good time.

On Jl. Legian, I found a hotel, the Sari Yasa Samudra Legian, where the front desk did not speak English, so I was able to get a bungalow there with my adequate Bahasa Indonesia. AC and breakfast (toast and coffee), but no hot water or cable, for $22/nite.

The hotel is about 50m to the center of Jl. Legian nightlife: Paddy’s, Maccaroni, and other nightspots.

To celebrate New Year’s Eve, I went to Maccaroni for their dinner party. At midnite 3 kecak fire dancers performed, which was breathtaking in the dark.

Some really good restaurants in the area are Cafe Havana on Jl. Popies 1, and Cafe Sendok on Jl. Legian. Cafe Havana has excellent Cuban/Latin American food, including burritos and tortillas, but not tacos. I’m not exactly sure why there’s about 100 photos of Che Guevara, though.

Cafe Sendok is very popular at nite. It has good food and also free wifi.

I brought an Acer Aspire One netbook on this trip – only 2 pounds. Generally you can find free wifi around Jl. Legian at all times, so I was able to keep up on my email.

One change worth mentioning is that Ade Rai’s Hammerhead Fitness Gym moved from the very convenient Jl. Legian to the somewhat remote Jl. Nakula about a year ago.

It is located on the 3rd floor, above a minimart. (If you can climb to the third floor without puffing, you’re already in shape. :) ) A staff member told me they used a crane to move the gym equipment.

The gym is now a little smaller and more crowded, and doesn’t have a separate floor area or crossover cable apparatus. It’s out in the countryside, but still the best gym in Bali, so people find it. Flagging down a taxi is possible, but they dislike destinations on Jl. Legian, fearing traffic jams.

There’s a big picture of Komang Arnawa in the lobby, who now trains in Australia. I met his brother, Ketut, who lives in Bali and also works out.

There is also a Wawan’s Gym in Tuban, but I haven’t visited there yet.

Lombok

I spent one nite and day on the island of Lombok, which was a 20 minute flight on Merpati ($78 return) from Denpasar, or 5 hour ferry. I chose to fly. You can see great views of the Bali and Lombok mountains on the right-hand side of the plane, including Mt. Rinjani, clouds permitting.

I stayed in the Hotel Holiday Beach Lombok, $62/nite, which is an outdoor beach resort with good facilities and dining on Sengigi Beach. It’s located 30 minutes from the airport. It must be a 4-star hotel, since it has an acre of marble in the lobby.

There is a small gym, which is usable if you pre-AC it for an hour and arrange the equipment with enough separation for safety.

During the daytime in Lombok, I took photos in Batu Bolong Hindu Temple, and a nearby village. There were 2 new cute housing developments, with dozens of colorful one-room buildings for sale.

According to the driver, Pak Haji, who has been a driver for the hotel for 15 years, Lombok is what Bali looked like 20 years ago. Indonesian people are not that excited about visiting Lombok because it “just looks like a typical village.” :)

Going Home

The flight back was tough. My connecting flight in HK was delayed over 2 hours because the plane was commandeered to replace one needed for an Indian leg apparently.

Because of the delay, my boarding pass was also good as a meal voucher for $75 – that’s HK$75, only enough for a burger combo. The restaurant employees helpfully run up your total until it hits $75, whether you ask or not.

Eventually my plane showed up, and we had a 80-100 mph tailwind – but with a very sick family onboard, crouping all 10 hours of the flight. The kind of souvenir you don’t want to take home, but unavoidable.

Note: prices listed above are in USD at an exchange rate of USD$1 = 11,000 Rp.