PPRuNe Forums - Search Results
PPRuNe Forums

Go Back  PPRuNe Forums > Search Forums
Reload this Page >

Search Results

Register
FAQ
Calendar
Wikiposts
Today's Posts
Search
Vendor Directory
Search: Posts Made By: gravity32
Showing results 1 to 29 of 29
Search took 0.00 seconds.
Forum: Tech Log
17th Sep 2011, 11:13
Replies: 95
Views: 19,016
Posted By gravity32

A320SlaveThere is a great deal I don't know about...

A320SlaveThere is a great deal I don't know about aviation and I get some things wrong. I am happy to ask for advice. That is why I am here. But I do not take advice from just anyone.

For...
Forum: Tech Log
17th Sep 2011, 09:30
Replies: 95
Views: 19,016
Posted By gravity32

A320,True, but I soon learned here that most of...

A320,True, but I soon learned here that most of these experienced pilots agreed that there was no reason to suspect the radalt would be wrong, and therefore it must have been the pressure altitude...
Forum: Tech Log
17th Sep 2011, 07:35
Replies: 95
Views: 19,016
Posted By gravity32

A320, You clearly know enough about this...

A320,
You clearly know enough about this crash to know that there were no buildings other than the Citgo service station in the vicinity. How high is that? It provides little more than a roof over...
Forum: Tech Log
17th Sep 2011, 04:16
Replies: 95
Views: 19,016
Posted By gravity32

A320, Everyone but you on this thread...

A320,

Everyone but you on this thread confirms that the radalt will be accurate in this case because the plane is not tilted, is not closing too rapidly with the terrain and, close to impact, is...
Forum: Tech Log
17th Sep 2011, 01:44
Replies: 95
Views: 19,016
Posted By gravity32

I have been aware of the paper by Legge and Stutt...

I have been aware of the paper by Legge and Stutt for some time. I found the paper to be logical. I saw that the discrepancy between the radalt and the pressure data was so large that even if they...
Forum: Tech Log
16th Sep 2011, 21:58
Replies: 95
Views: 19,016
Posted By gravity32

A320, "It depends on what you are measuring...

A320,
"It depends on what you are measuring as to which instrument to use. The Radalt isn't even required for IFR flight but a pressure altimeter is. Why does the FAA require the use of a...
Forum: Tech Log
16th Sep 2011, 20:38
Replies: 95
Views: 19,016
Posted By gravity32

A320, I notice you did not provide your reason...

A320,
I notice you did not provide your reason for preferring the pressure to the radalt, just attacked some authors. You quote Pilots for 9/11 Truth: "What we do claim, is that the data provided by...
Forum: Tech Log
16th Sep 2011, 17:05
Replies: 95
Views: 19,016
Posted By gravity32

A320 You appear to be using Pilots for 9/11...

A320

You appear to be using Pilots for 9/11 Truth as your authority. This group asserts that the plane could not have hit the Pentagon. As they base this belief largely on the high altitude...
Forum: Tech Log
16th Sep 2011, 16:38
Replies: 95
Views: 19,016
Posted By gravity32

A320Slave and skwinty, It seems we have a...

A320Slave and skwinty,
It seems we have a disagreement. A320 says the calibration should be OK to Mach 0.86, skwinty says "the aircraft was completely outside of its normal flight envelope".
...
Forum: Tech Log
16th Sep 2011, 15:39
Replies: 95
Views: 19,016
Posted By gravity32

skwinty, I don't know the purpose of your...

skwinty,
I don't know the purpose of your question about supersonic aircraft and I don't know the answer. Here is what I think. It is quite likely that the form of the airstream around a supersonic...
Forum: Tech Log
16th Sep 2011, 15:01
Replies: 95
Views: 19,016
Posted By gravity32

skwinty, you ask: "What does the FDR say about...

skwinty,
you ask: "What does the FDR say about the speed of the aircraft"
The FDR shows a final speed of 488 knots.

"and what would be the significance of this excess speed and barometric...
Forum: Tech Log
16th Sep 2011, 10:50
Replies: 95
Views: 19,016
Posted By gravity32

skwinty, The complexity of finding an...

skwinty,

The complexity of finding an appropriate spot for the static port, and the remaining errors due to changes in speed, angle of attack and sideslip, may be seen here:...
Forum: Tech Log
16th Sep 2011, 04:31
Replies: 95
Views: 19,016
Posted By gravity32

skwinty, Unfortunately that link to altimeters...

skwinty,
Unfortunately that link to altimeters does not apply to the case in question as it does not cover barometers inside planes. That is where the errors of interest arise. They arise due to the...
Forum: Tech Log
15th Sep 2011, 13:37
Replies: 95
Views: 19,016
Posted By gravity32

Yes I was aware of Warren Stutt's work, decoding...

Yes I was aware of Warren Stutt's work, decoding the last frame of the FDR file, and thus proving Pilots for 9/11 Truth wrong in their assertion that the FDR file did not match the official flight...
Forum: Tech Log
15th Sep 2011, 10:19
Replies: 95
Views: 19,016
Posted By gravity32

The data is unadjusted in the sense that nothing...

The data is unadjusted in the sense that nothing has been done to it other than to convert pressure to feet, using standard atmosphere. If you can convert pressure to feet, you can convert backwards...
Forum: Tech Log
15th Sep 2011, 06:20
Replies: 95
Views: 19,016
Posted By gravity32

skwinty and ChristiaanJ Yes the altitude...

skwinty and ChristiaanJ

Yes the altitude data is unadjusted in the FDR file. We know it is unadjusted because in all 12 flights on the file there is no jump at the transition level on ascent and...
Forum: Tech Log
14th Sep 2011, 14:19
Replies: 95
Views: 19,016
Posted By gravity32

felixthecat, You are of course right. However...

felixthecat,
You are of course right. However this is not relevant to the problem as we used the ground elevation at every position report to produce a corrected radalt altitude. The result was...
Forum: Tech Log
14th Sep 2011, 14:01
Replies: 95
Views: 19,016
Posted By gravity32

Thanks skwinty, but I don't think it is relevant...

Thanks skwinty, but I don't think it is relevant as it refers to errors the pilot may encounter shortly after passing through the transition level if he makes a large adjustment. It therefore applies...
Forum: Tech Log
14th Sep 2011, 13:38
Replies: 95
Views: 19,016
Posted By gravity32

skwinty, This is a good point to check out....

skwinty,
This is a good point to check out. Naturally any adjustment will make a difference to what the pilot will see. However in the case at hand we are using the pressure data in the FDR file....
Forum: Tech Log
14th Sep 2011, 12:08
Replies: 95
Views: 19,016
Posted By gravity32

Avtrician, Speed does have an effect on the...

Avtrician,
Speed does have an effect on the altimeter if the plane flies outside the calibration envelope. These issues have already been covered. The plane was nearly level at the end so radalt...
Forum: Tech Log
14th Sep 2011, 08:14
Replies: 95
Views: 19,016
Posted By gravity32

skwinty, You are apparently not involved in...

skwinty,
You are apparently not involved in debate with people about these theories so you are not familiar with how it works. As you say there is no point in trying to convince a believer to change...
Forum: Tech Log
14th Sep 2011, 08:01
Replies: 95
Views: 19,016
Posted By gravity32

mono, Yes, but the graph will provide the...

mono,
Yes, but the graph will provide the limits to the calibration envelope, and thus prove the plane was outside the envelope. That will be something. It will also be interesting to see in what...
Forum: Tech Log
14th Sep 2011, 03:28
Replies: 95
Views: 19,016
Posted By gravity32

Mad (Flt) Scientist, This is not about tilting...

Mad (Flt) Scientist,
This is not about tilting at windmills. You are no doubt right that it will be impossible to persuade these pilots that they are wrong, but it will be possible to reduce their...
Forum: Tech Log
14th Sep 2011, 01:50
Replies: 95
Views: 19,016
Posted By gravity32

STBYRUD, Apparently you are getting an 8% error...

STBYRUD,
Apparently you are getting an 8% error in your radalt. That seems excessive. Don't manufacturers quote 2 or 3 % max? That error would diminish as you descend, as manufacturers quote a max...
Forum: Tech Log
13th Sep 2011, 17:59
Replies: 95
Views: 19,016
Posted By gravity32

Mad (Flt) Scientist and Lightning Mate, The...

Mad (Flt) Scientist and Lightning Mate,

The FDR data file shows that the radalt and the pressure agree very well while the plane is flying at 310 knots at 2500 feet. This was shown by adding the...
Forum: Tech Log
13th Sep 2011, 17:47
Replies: 95
Views: 19,016
Posted By gravity32

Thaks skwinty, that is useful but it still does...

Thaks skwinty, that is useful but it still does not provide me with Boeing's calibration data. I have been told there is a graph of it in the Flight Manual and that is what I am hoping for.
Forum: Tech Log
13th Sep 2011, 17:02
Replies: 95
Views: 19,016
Posted By gravity32

Thanks skwinty, that has already become clear...

Thanks skwinty, that has already become clear from comments on the other thread. What I am looking for now is documetary evidence of the calibration envelope. I want to see what Boeing says about...
Forum: Tech Log
13th Sep 2011, 15:33
Replies: 95
Views: 19,016
Posted By gravity32

I don't want to do it. I am looking at the FDR...

I don't want to do it. I am looking at the FDR data file, and I see this discrepancy between radalt and pressure and would like to know the cause.
Forum: Tech Log
13th Sep 2011, 14:56
Replies: 95
Views: 19,016
Posted By gravity32

altimeter calibration

Early this year I started a discussion on another forum asking what might cause a discrepancy between altitude calculated from radalt plus ground elevation, and altitude as shown by an altimeter, ...
Showing results 1 to 29 of 29


 
Forum Jump

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.