Boeing 787 First Flight Today 10AM PT

http://787firstflight.newairplane.com/

by joshwa • 17 years ago

41 34 17 years ago

787firstflight.newairplane.com

yosho• 17 years ago

Wasn't that plane delayed for like 2 years or something?

notauser5• 17 years ago

First flight is a bit more than 2 years late according to Wikipedia.

However that's not bad for a project this complicated, being built in so many different places. I know more than a few aerospace engineers who would be delighted to deliver their projects only 2 years late.

For the frequent fliers here I'd recommend this wing load testing video http://www.youtube.com/watch?v=pe9PVaFGl3o - it's from the 777 program but it's pretty interesting.

Personally I think the A380 will be more successful due to the increase in the number of Chinese residents able to afford flights and their population density making big city to big city routes a larger component of demand. However there's clearly space in the market for both as they have different roles.

gvb4• 17 years ago

"However there's clearly space in the market for both as they have different roles."

Agreed, they serve very different markets in many ways. In addition, I see the A380 and 787 as radically different approaches to the same problem: fuel economy. The A380 approach is to use a lot of fuel but to haul as many bodies as possible. By amortizing the fuel over more bodies, it gives good fuel economy per body.

The 787 uses a very efficient aerodynamic design and reduced weight to use less fuel per aircraft, thus amortizing less fuel over the (fewer) bodies it hauls.

The weakness of the A380 approach is load factor: if the plane isn't full, it will use more fuel per body.

The weakness of the 787 approach is that they must hit their weight targets to achieve all of their projected fuel savings. They are currently overweight compared to their wishes (some of the first flight delays were caused by a need to reinforce parts - that means more weight).

gvb4• 17 years ago

The original first flight was scheduled for November 27, 2007.

Spelunking back in history to the original delay announcement, http://www.usatoday.com/money/industries/travel/2007-09-05-b..., is interesting:

"Chicago-based Boeing now is struggling to avoid missed deadlines and their resulting costs in dollars and reputation. Airbus, for example, is running an embarrassing 22 months behind on production of its new A380 super-jumbo jet, its flagship product. Those delays caused management shake-ups, canceled orders and costly payments to customers."

Boeing and the world gave Airbus a lot of grief for the schedule slippage of the A380. Boeing has subsequently gotten its share of grief for 787 slips. Interestingly, I've seen comments holding the A380 up as a success vs. the 787 by people who have already forgotten the A380 schedule slips.

johnohara• 17 years ago

The wide-angle photo of the flight deck under "who's building" is very cool.

Beautiful aircraft.

amichail• 17 years ago

What is the probability that a plane by Boeing or Airbus will encounter a flight problem in its first flight that would be noticeable to the general public?

borism5• 17 years ago

You mean like a crash? Quite low probability on a first flight.

Otherwise there are hundreds of minor problems that are revealed during flight testing, after all that's the point of flight testing program.

joubert• 17 years ago

The Dreamliner cabin was included in the Cooper-Hewitt's 2006 Design Triennial. It looked pretty nice, but only a handful of airlines have any taste when it comes to their interiors.

gaius4• 17 years ago

Meh, it looks the same as any other airliner. Where're the radical designs, a la Concorde (delta), Comet (engines in wings) etc etc? Boeing's just making tweaks to a basic design that's been around since the 1960s.

gvb4• 17 years ago

The radical design is under the skin. OK, in and under the skin. "Its materials (by weight) are: 50% composite, 20% aluminum, 15% titanium, 10% steel, 5% other." http://en.wikipedia.org/wiki/787_Dreamliner#Features

The Concorde had a delta wing so it could fly supersonically with acceptable range (fuel economy vs. tankage). The trade-off for that speed was horrible fuel economy and poor takeoff and landing characteristics (extremely high drag - it had to use afterburners to get airborne).

WRT the Comet, airframers don't put engines in wings because they are a bugger to service there.

notauser5• 17 years ago

A big part of the reason for hanging the engines is actually because it means you can make the wings less robust.

If you have in-wing engines they generally have to be near the root (where the wing connects to the fuselage) because engines are large, wings taper and wings shouldn't be too fat. Under wing engines can be hung wherever you like, within reason.

If you simplify things a bit you can think of a wing as a cantilever which supports half the weight of the plane, balanced by an equal upwards force spread out along the whole wing.

By shifting weight towards the middle of the wing, as you can do by moving an engine outboard, some of your weight is no longer at the end of the lever but instead is closer (on average) to where the upwards force is being applied. This decreases the load you have to design for even though the weight remains the same.

jedc• 17 years ago

Radical designs are in manufacturing (ie, massive use of composites) rather than aerodynamics.

And that "basic design" has had a lot of efficiencies made to it in the last 50 years. I'd be highly surprised if there were any potential design changes left that could make a visible difference. (Ignoring things like lifting bodies that would drastically change the passenger experience.)

rbanffy• 17 years ago

Neither approach (delta wings, in-wing-engine) worked out well.

Delta wings are great in supersonic flight, but not so in shorter distances and for takeoff and landing. The Concorde is a beautiful machine, but not a terribly practical one. I miss it, BTW.

Comet-style in-wing engines cannot use silent and efficient turbofan designs and would need fat wings to accommodate the engines, increasing drag. The position of the engine exhaust also limits the efficiency of the wing and the effectiveness of the control surfaces.

Radical designs require more engineering than any airplane manufacturer can afford right now. It's not like airlines will dump all their 747s and 380s (and all other 7x7s and A3xxs) just because there is a more efficient plane rolling out of the factory line. Airplanes are horribly expensive and have a very long service life.

run4yourlives• 17 years ago

Like all design, the more radical, the more risk.

While it would be awesome to see a canard design, which would be the most logical choice given fuel costs and safety, the odds of a struggling airline manufacturer introducing something so risky are extremely low.

InclinedPlane• 17 years ago

Your comment is a good example of how not to communicate effectively.

You pose a "question" in such a condescending and dismissive tone that leaves no room for fallibility in your assumptions or your knowledge, no reasonable answer other than "hurr, of course you're right and Boeing is teh dumbs" is possible without introducing conflict. If instead of taking a confrontational tone you took an inquisitive, deprecatory route of acknowledging that you lack perfect knowledge of aerospace design and are curious exactly why the 787 is considered so radical a design, given the seeming lack of outward differences of appearance from existing planes, you would perhaps start an engaging, informative discussion.

gaius4• 17 years ago

My point is purely an aesthetic one. This is what Boeing could have done:

http://en.wikipedia.org/wiki/Boeing_Sonic_Cruiser

Now that's beautiful. It looks like a Skylon:

http://en.wikipedia.org/wiki/Reaction_Engines_Skylon

Instead it looks the same as every other airliner.

gills• 17 years ago

Software guy: "Here's your new efficient CRM server!"

Pointy-haired guy: "Where's teh xml? Where's teh 3D? Your software is lame and from the 1960s."

Really?

gaius4• 17 years ago

It's more like the boss asked for a website and the programmer delivered a greenscreen.

banjiewen• 17 years ago

Huh. I'm on my phone, so I can't view the site, but I saw a 787 go over my head at about 7:30 this morning as I left home in west Seattle, which is just northwest of Boeing field.

Strange that they're saying it's 10am. Then again, maybe I was mistaken. But full-size jets that look just like 787s don't land at boeing field every day.

jonah• 17 years ago

Quite possible it was - makes sense to me that they'd make private test flights before the first public one. Good to reduce the chance of any serious issues getting widespread publicity.

notauser5• 17 years ago

I believe they flew the A380 a few times before the big day.

Watching them throw it around a bit at the Paris air show was interesting. http://www.youtube.com/watch?v=YH6tO1qZez8#t=1m06s

mojuba• 17 years ago

It's ugly. Just look at its nose from the side - it's evilish and ugly. The most beautiful thing Boeing has ever designed is 747. Or compare it to A380.

borism5• 17 years ago

Beauty is in the eye of the beholder.

It's a beautiful machine designed with very specific task in mind.

The only thing I dislike aesthetically is it's huge dihedral.

bodhi• 17 years ago

In the design highlights, it has a diagram of the materials used in each section of the plane. The pointy part at the back is the only part made of titanium in the whole plane, does anyone have any idea why that would be?

designtofly• 17 years ago

My guess is that it's the exhaust for the Auxiliary Power Unit [1]. The APU is essentially a small gas turbine generator, so the exhaust temperature is approximately 1000°C. This is way above the melting temperature of composites, and even aluminum.

This site [2] has a very good discussion about the Boeing 737 APU and APU exhaust (which they call an "Educator").

[1] http://en.wikipedia.org/wiki/Auxiliary_power_unit [2] http://www.b737.org.uk/apu.htm

Boeing 787 First Flight Today 10AM PT

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