Engines thrust power reduction

While the plane was upside down we noticed the
plane rotating around its center point. It lost altitude
and stayed stalled. As it was falling, it seemed like the
nose pointed down and then the plane might have began to
level off as it disappeared behind the hill.

www.ntsb.gov...

Entropy has what exactly to do with them stalling the airplane? Or the medical examiner finding acetominephine in one pilots urine?

[edit on 1/6/2006 by Zaphod58]

On January 7, 2006 a Cessna airplane SP-FLM was destroyed on impact with a frozen lake near Poznan (Poland) following an in-flight loss of power.

Entropy won.

The report with pics (in polish):
fakty.interia.pl...


pics:
fakty.interia.pl...



[edit on 7-1-2006 by elpasys]

"I believe that there is something intrinsically wrong with this plane." So said Colorado Representative Tom Tancredo to a Denver television station last week.

The latest accident -- in which two pilots were lost shortly after takeoff from Terrance, British Columbia on December 20 -- is the 12th in less than two years, according to Tancredo.

Tancredo became an outspoken opponent of the MU-2 in the wake of two fatal accidents involving the aircraft near Denver's Centennial Airport, in just over a year. The circumstances involved in the Terrance accident are similar to an accident approximately one year ago at Centennial, when two pilots were lost after their aircraft went down after takeoff.

After the latest accident, Tancredo sent a letter to the NTSB calling for the agency "to conduct a 'special safety study' to determine what is causing the unexplained, undetermined loss of power in engines in a growing number of incidents."

Entropy won.

More:
www.aero-news.net...

As usual, you completely ignore evidence in your own sources, to prove that this magial "entropy" exists and causes every plane crash ever. The following quotes come from your own source, which if you had bothered to read, you would have seen.

The aircraft's flight characteristics at low speeds and altitudes -- what is traditionally called "slow flight" -- have also been questioned, and it is in those areas most have suggested the MU-2 may pose additional challenges to a pilot unfamiliar with the aircraft's idiosyncrasies.

In two previous inquiries into the safety of the MU-2, the FAA has called for increased pilot training to remedy the situation. The agency also recently submitted what it calls a comprehensive review and safety evaluation of the MU-2, which the agency began shortly after a second accident near Centennial on August 4, 2005.

Operators of the MU-2, as well as Mitsubishi, have also called for increased pilot training for the aircraft -- but according to Tancredo (right), those responses aren't enough.

"If indeed the FAA is right, that this plane keeps falling out of the sky because of pilot error

[edit on 1/9/2006 by Zaphod58]

Originally posted by elpasys

pics:
fakty.interia.pl...



[edit on 7-1-2006 by elpasys]

Pics, new link:
fakty.interia.pl...ławianie%20cessny

Originally posted by Zaphod58
As usual, you completely ignore evidence in your own sources, to prove that this magial "entropy" exists and causes every plane crash ever. The following quotes come from your own source, which if you had bothered to read, you would have seen.

44th AIAA Aerospace Sciences Meeting and Exhibit
9 - 12 January, 2006
Reno Hilton
Reno, Nevada
www.aiaa.com...

Entropy topics:

AIAA-2006-587:
Assessing CFD Modeling of Entropy Generation for the Air Frame Subsystem in an Integrated Aircraft Design/Synthesis Procedure.

AIAA-2006-599:
Optimal Design of Tube Banks in Crossflow Using Entropy Generation Minimization Method.

No comments.

Do you know what these papers are about?


Entropy is produced by friction in boundary layers, the first paper is looking at the accuracy of CFD in predicting friction and the side-effects. Probably also looking at the meshes as it would have a strong bearing on entropy modelling accuracy.

The 2nd paper is using measurements entropy generation as a method for reducing friction.

Islamic Revolutionary Guard Corps Commander speaking to the press about Monday's (January 9, 2006) Dassault Falcon Jet crash, said that the aircraft suffered both landing gear and engine problems before crashing. A Brigadier General in the IRGC, said that the twin-engine Falcon 20 was enroute from Tehran to Oroumiyeh near the Turkish border, when the pilot informed the control tower that he could not extend the landing gear.

"The plane's pilot then asked permission to return [to Tehran], and before getting far from the [Oroumiyeh] tower, he contacted the tower again to say that both engines had also failed."

Entropy won

More: www.aero-news.net...

A twin-engine Piper PA-34 Seneca went down on March 20, 2006 near the center of the resort town of Branson, MO. All four onboard the aircraft died in the crash. The plane's pilot apparently experienced engine problems shortly after taking off from Point Lookout, MO. The plane, which was carrying a full load of fuel, impacted a building containing storage units off of Highway 76. The plane was bound for Lubbock, TX. One witness said it sounded like the Seneca was having engine problems

Entropy won.

Entropy issue in aviation, see now:
dmses.dot.gov...

I don't know why I'm even bothering, but I'll try once again. You are so far off on some of these it's almost pathetic.

TWA-800 a high voltage wire sparked sending a short down a low voltage wire into the almost empty fuel tank causing the vapor to explode.

Air Transat the mechanics failed to replace a bracket allowing two lines to rub together breaking a fuel line open and causing a major fuel leak. Airplane ran out of fuel.

Concorde was damaged by a piece of metal rupturing the fuel tank. The metal came off a Continental DC-10 that took off before it.

How does a *BOMB* prove entropy? Someone put it on the plane and blew it up. How does that have *ANYTHING* to do with entropy?

IIRC the Pinnacle plane was because the flight crew decided to see how high they could go and exceeded the design specs of the airplane. No entropy there.

How does misloading of a plane and putting the CG too far forward prove entropy?

Alaska Airlines- Are you serious? What went wrong? Good lord just look at the picture! They flew it too long without replacing the jackscrew like they were supposed to and it failed. Plain and simple.

Columbia had a giant hole punched in the wing from foam falling off the fuel tank. No entropy there.

Hi Zaphod58,

Comments Invited
Interested parties are invited to submit comments on these documents.
DOT Docket Web site: dmses.dot.gov...
"Reduction of Fuel Tank Flammability in Transport Category Airplanes".

Originally posted by elpasys
Hi Zaphod58,

Comments Invited
Interested parties are invited to submit comments on these documents.
DOT Docket Web site: dmses.dot.gov...
"Reduction of Fuel Tank Flammability in Transport Category Airplanes".

a link: dms.dot.gov...

Originally posted by elpasys
On January 13, 1982, Air Florida Flight 90, a Boeing 737-222 (N62AF) was a scheduled flight to Fort Lauderdale, Florida, from Washington National Airport, Washington, D.C. The scheduled departure time was delayed about 1 hour 45 minutes. The aircraft took off in heavy snow. The tower lost sight of Palm 90 during it's roll due to the reduced visibility, but radar showed it airborne and the tower controller instructed Palm 90 to contact the departure controller. Less than a minute after taking off, Palm 90 descended at low airspeed into the Rochambeau bridge and plowed through into the Potomac river, 0.75 nmi from the departure end of runway 36.

Beginning information gave evidence of airframe icing, but further analysis showed other probelms with Palm 90. Shortly before takeoff, the crew have a brief discussion concerning anomalies in the engines. The indications seemed to return to near normal as Palm 90 got closer to takeoff. As Palm 90 was cleared for takeoff, the pilot remarked at the abnormal indications from the engines again. During takeoff the the aircraft was not accelerating properly due to fuel's entropy. The aircraft traveled almost 1/2 mile (800 m) further down the runway than is customary before liftoff was accomplished. Still, 45 seconds into the takoff roll, Palm 90 reached it's rotation speed and pitched up abruptly. Survivors indicated the trip over the runway was extremely rough, one of whom admitted he feared that they would not get airborne and would "fall off the end of the runway."

Although the aircraft did manage to become airborne, it failed to gain altitude, then the stall warning came on, "Forward! Forward!", indicating to lower the nose to prevent the stall. and. The aircraft remained airborne for only 30 seconds. The pilot believed that the engines were producing max thrust during takeoff.

The CVR recording ended with the crew's final acknowledgement of the severity of their situation. "Larry-we're going down Larry!". "I know it!".

There were 74 passengers, including 3 infants, and 5 crew members on board. Only six people survived.

The National Transportation Safety Board determines that the probable cause of this accident was the flight crew's failure to use engine anti-ice during ground operation and takeoff, their decision to take off with snow/ice on the airfoil surfaces of the aircraft, and the captain's failure to reject the takeoff during the early stage when his attention was called to anomalous engine instrument readings(!).

now this is not because of the fuel. the power probe on one engine was iced over giving false readings. hence the confusion over the ammount of thrust the engine was giving.

the biggest factor in this crash was the inexperience of the crew due to the recent mergers.

read the book "blind trust" from john nance. he goes indepth on this crash and how deregulation caused a spate of crashes early on into the new era of deregulation

Originally posted by elpasys
Entropy = Cavitation

"Cavitation occurs in pumps, as well as around propellers, or at restrictions in a flowing liquid. Cavitation means that cavities are forming in the liquid being pumped. Cavitation also reduces efficiency dramatically."

See: Cavitation
in Nedeworks Encyclopedia, pedia.nodeworks.com...

the only way you are going to have cavitation is if it is pumping the wrong liquid.

a little refinery lesson for you elpasys.

pumps are not just made and you throw them in. a pump that is going to pump a liquid as heavy as jet fuel will not pump will not pump something as light as naptha. also a pump that will pump a light liquid like propane will not pump jet fuel.

so if you are getting cavitation on a pump that is pumping jet fuel then you really aren't pumping jet fuel

positive dispalcement pumps don't cavitate, though they can pump liquids of different viscosity though.

[edit on 9-4-2006 by bigx01]