There is a formula for EPR in the link I provided above. I don’t think that a thrust to drag ratio is a good way of putting it though.
That’s the same tactic that Continental used with their pilots about 4 months ago. Suprise, suprise. The deal was made and the 787 order wasn’t canceled.
The data is not incorrect, it’s just that no one has yet been able to explain to me how an EPR of less than 1 doesn’t result in engine surge or stall.
I don’t know if this would help but here’s an online Engine Simulator where you adjust thrust levels and see how it changes different engine perameters.
http://www.grc.nasa.gov/WWW/K-12/airplane/ngnsim.html
Change the Output to Engine Performance to see the EPR and other things. At idle you get an EPR less than 1.0.
Basically my guess would be that at idle the mass of the exhaust is at it’s lowest which creates an almost Venturi-type situation since the entry and exhaust air mass is about the same (very little fuel added). Same air mass being accelerated to a higher speed = lower pressure. At higher power settings you are dumping in a bunch of fuel which raises the mass of the air exiting the engine and you end up with a higher EPR.
The fuel rate at idle for different engines would mean some engines would have a <1.0 EPR compared to others that don’t. When I talk about idle I’m only talking about on the ground as inflight “idle” is actually just a very low power setting and increases with altitude. Of course I guess a < 1.0 EPR could happen in flight with the right circumstances.
Disclaimer: I have no experience with EPR as I’ve only used N1 speeds for power setting.
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As for favorite engine I put my vote in for the PW PT6 series. It’s used in just about every highly rated helicopter or aircraft. It’ll go forever and eat just about anything and never lose power.
I don’t see the harm. No different than landing on a wet runway or in rain.
If you search online you can find a review of this movie already and it sucks. Actually “sucks” it putting it politely. I can see why Airbus isn’t thrilled with them using an A380 type aircraft.
Here’s a similar article:
http://www.itvx.com/ppnews.asp
In a curious instance of high-profile product placement that apparently isn’t, Buena Vista’s new Jodie Foster thriller, Flight Plan, features a plane that is a dead ringer for the soon-to-be-released new Airbus A380. Both Airbus and Buena Vista deny that the release of the movie just before the delivery of the first A380 jets in March 2006 are coordinated events. Deny placement deal A spokeswoman at Airbus North America said Flight Plan’s producers, including Touchstone Pictures and Imagine Entertainment, never contacted the company for support. A Buena Vista representative said the massive airliner used as the main set of the movie is a fictional craft. The actual Airbus A380, which made its first test flight last week, is a spectacular new product that goes into the record books as the world’s largest airliner. A double-decker jet that can seat 555 passengers but has room for more than 800 eclipses rival Boeing’s 747 as the world’s largest airliner. Days before the test flight, Buena Vista released the first trailer for Flight Plan featuring an amazingly similar craft. A Buena Vista representative, however, said that timing was also “coincidental.” But the fictional jet’s details are very similar to the real thing: Two full decks of passenger seating with large spiral staircases, seven galleys, a full bar and a cockpit with bunks for the crew. “It’s brand new,” Ms. Foster’s character says in the film’s trailer. “It’s the biggest.” Airbus is counting on the A380 to appeal to international airlines as it battles rival Boeing and its aging 747 fleet. Air France, Virgin Atlantic, Singapore Airlines, Qantas, Emirates, Lufthansa, Korean Air, Malaysia Airlines, Etihad Airways, Thai Airways, Qatar Airways, FedEx and UPS have ordered 154 A380 jets, as of January. The plane has a list price of $285 million. Airbus needs to sell 250 of the planes to break even, the company said. Given steep development costs, however, analysts say that number is much larger. ‘They have to sell the planes’ “They have to sell the planes to the airlines,” said Richard Aboulafia, an aerospace analyst with the Teal Group, a Virginia-based consultancy. “It’s all about getting out there and promoting a positive image of the aircraft. It’s all about making the numbers. You can make an argument that all publicity is good publicity.” Airbus has been promoting the A380 “as the cruise ship of the sky with tanning salons and duty-free shopping,” Mr. Aboulafia said. “But if you’re going to promote an unrealistic image of air transportation, you might find yourself facing the flipside of that and affected by other unrealistic images, too.” “Ultimately to airlines,” he said, “it comes down to economics and not whether people enjoy the experience. Studies have shown that people don’t pay a whole lot of attention to the kind of plane they’ll be flying in when booking a flight.” Buena Vista said the film’s producers needed a large airplane to make the plot believable. It just wouldn’t have worked on a traditional single-deck jet. In the film, Ms. Foster’s character is an aviation engineer who mysteriously loses her 6-year-old daughter during a flight from Germany to the U.S. Viewers mistake it for real thing The airplane designs and interiors in the film are so strikingly similar to the A380 that early viewers of the film have mistaken Flight Plan’s set for the real jet, according to several test-screen reviews that have been posted on the Internet. “The plane is probably just as much of an important character to the movie, and it was kinda cool/unique that it was that new Airbus plane,” wrote one reviewer. According to another: “The plane itself is by far the most conspicuous character in the film. Looking suspiciously like Airbus’ new dreadnaught of the skies, the plane in this movie is, in a word, enormous.”
I’ve seen the trailer on the big screen…. other than having 2 decks the plane looks not much like an A380.
I don’t know, it looks a lot like the A380 to me. Not to mention, since there is only 1 double deck aircraft of this configuration it is clearly meant to imply it’s the A380.
edit: I’ve read online that the makers of the film didn’t bother consulting Airbus (probably knowing that Airbus wouldn’t be thrilled about a hijacking on their new product) so they created an aircraft very, very similar to the A380 and call it the A-474. Wow, no one will see through that vague reference. I guess Airbus is a bit miffed by the whole thing. Can’t imagine why. 🙂
I’m looking forward to your next big announcement then. Best of luck tackling this tricky industry.
Great pictures!
It looks like they intentionally removed the “757 Luxury Jet” from the American 757. Strange as the Luxury Jet tag has been on their aircraft for so long.
Where are they getting the Do328’s from? Would these happen to be from the fleet recently retired by PSA (US Airways Express) here in the US?
Add their cost savings from renegotiating with their union to their posted quarterly losses and UA is still WAY under from breaking even, not even close.
Tridentman, now in Spearmint.

The Jestream 31 was out of my local airport (Tupelo Regional), and the flight was to Memphis International in Memphis, Tennessee. It was when I was much younger, but I still remember the flight. Here’s a picture of a Jestream 31 operated by Express Airlines under the Northwest Airlink colors. The aircraft I flew on was in the same colors, and I assume Express was the airline that we flew on, although it could have been Mesaba (which flies Saab 340’s from here now in NWA colors). I’m not sure if Mesaba ever operated the J31
Interesting. Express 1 is now called Pinnacle and operates CRJ’s under the Northwest livery. I guess I never knew what they operated before the CRJ. Thanks for the info PhantomII.
DC-10 (Laker)
A good friend of mine use to be a FA at Laker on their DC-10. She loved working there.
I would guess that the Northwest 727’s were retired about 4-5 years ago, maybe a little longer than that.
Jetstream 31 (Northwest Airlink)
When/where did you fly on a Northwest Airlink J31? I didn’t know anyone flew them.
Here’s my list with the airline for those that I can remember:
727 (Piedmont)
737-1/2/3/5/7/8/900 series (Continental/United/Delta/Piedmont/Southwest)
747-200 (Air Canada/Air France)
757 (United/Continental)
777 (United)
DC-8 (United)
DC-9 (Continental/Northwest/Piedmont/PSA/Alleghany)
DC-10 (United/Continental/Delta)
MD-80 (Continental/Delta)
A320 (Frontier)
EMB-135/145 (ExpressJet)
Do328 (PSA: US Airways Express)
B1900D (Continental Express)
Shorts 330 (Mississippi Valley Airlines)
I also believe I flew on a L-1011 and CV-580 as a kid but I don’t remember for sure. I have pictures I took during the flight that would help but I don’t remember where they are. There are also a few other airlines for the above types but again, I’m not 100% sure what they were. I know I’ve flown on American since I have wings from the FA’s but I don’t remember where or when that was. Too bad.