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
 
Page 1 of 3
1
2
3
Search: Posts Made By: Concours77
Showing results 1 to 35 of 101
Search took 0.00 seconds.
Forum: Accidents and Close Calls
17th Feb 2018, 15:06
Replies: 420
Views: 145,526
Posted By Concours77

The aircraft entered a climb, at a velocity...

The aircraft entered a climb, at a velocity higher than allowed.
The aerodynamic surfaces were overloaded.
The tail in climb pitches the tail Down, to provide nose up.
Overloaded as it was, the...
Forum: Accidents and Close Calls
16th Feb 2018, 16:11
Replies: 420
Views: 145,526
Posted By Concours77

Sorry, you’re wrong. Slow the video down, and...

Sorry, you’re wrong. Slow the video down, and look at the HS(s). They failed upward, just as the wings did. Without tail downforce, the aircraft instantly lost positive g. Now it is possible that...
Forum: Accidents and Close Calls
15th Feb 2018, 14:14
Replies: 420
Views: 145,526
Posted By Concours77

megan If that is the air show prang I am...

megan

If that is the air show prang I am remembering, that was the third attempt at a loop by that pilot. He had high velocity, pulled all the way back, failing both Horizontal stabilizers. The...
Forum: Accidents and Close Calls
11th Feb 2018, 21:10
Replies: 420
Views: 145,526
Posted By Concours77

The Electra was a pretty complex aircraft for the...

The Electra was a pretty complex aircraft for the era so I am led to wonder if there may have been an element of "what is it doing now?", in the pilot's minds. Basically getting behind in flying the...
Forum: Accidents and Close Calls
10th Feb 2018, 22:26
Replies: 420
Views: 145,526
Posted By Concours77

You will have noticed I make the case for the...

You will have noticed I make the case for the aircraft rolling left at embankment Impact?

“It wasn't an issue of bad design, in my [nonpilot] opinion, but bad luck that they didn't know of the...
Forum: Accidents and Close Calls
10th Feb 2018, 15:14
Replies: 420
Views: 145,526
Posted By Concours77

I think there was something gone wrong that made...

I think there was something gone wrong that made recovery unsussable, if at all possible. The three degree scar/artifact in the inboard closing rib means only that was deflection as the wing tip...
Forum: Accidents and Close Calls
9th Feb 2018, 14:46
Replies: 420
Views: 145,526
Posted By Concours77

I’m afraid you don’t understand my comments....

I’m afraid you don’t understand my comments. Hands removed from controls return the control surfaces to neutral, unless trim is supplied through the (unboosted) Trim cables.

With “no authority”...
Forum: Accidents and Close Calls
8th Feb 2018, 23:42
Replies: 420
Views: 145,526
Posted By Concours77

By “significantly interfere” is your meaning...

By “significantly interfere” is your meaning aerodynamic interference (Which would have been known, via wind tunnel testing in design) or mechanically, flap fowling aileron at inboard pocket rib? The...
Forum: Accidents and Close Calls
7th Feb 2018, 21:12
Replies: 420
Views: 145,526
Posted By Concours77

Hi Gouli, Whirl mode is what leads to wing...

Hi Gouli,

Whirl mode is what leads to wing loss, but only if there is a wing flutter component attached. There needs to be a (wing) sympathetic flutter concurrent and matching at low Hertz. These...
Forum: Accidents and Close Calls
7th Feb 2018, 14:49
Replies: 420
Views: 145,526
Posted By Concours77

Electra LEAP

The first thought on someone’s (objective) mind would be Whirl Mode.

Absent the main spar couple at low Hertz, the power line (especially outboard) can inflict serious damage to the wing,...
Forum: Accidents and Close Calls
7th Feb 2018, 00:29
Replies: 420
Views: 145,526
Posted By Concours77

Thanks megan, for the links. I am trying to suss...

Thanks megan, for the links. I am trying to suss my misunderstanding of Whirl Mode. I think I stated the phenomenon is common, and not unique to the Electra.

The concentration of power/mass...
Forum: Accidents and Close Calls
6th Feb 2018, 23:10
Replies: 420
Views: 145,526
Posted By Concours77

More...

Hello,

From the (sim) angles alone, my guess of angle of Bank at RR embankment impact is no more than forty degrees, likely less.

The angle of crossing included with angle of descent, plus...
Forum: Accidents and Close Calls
6th Feb 2018, 17:56
Replies: 420
Views: 145,526
Posted By Concours77

As to..

Agreed as to parameters of controlled flight. Motion of any body that has no aerodynamic stability, or stable CG cannot be predicted without a great deal of data. In the sixties, the supercomputer...
Forum: Accidents and Close Calls
31st Jan 2018, 00:42
Replies: 420
Views: 145,526
Posted By Concours77

Two tail slides and a gentle Lomcevak. Flying...

Two tail slides and a gentle Lomcevak. Flying tail first takes a lot of skill. Those maneuvers are all under complete control.

Even ballistic, drag and momentum have a part to play in trajectory....
Forum: Accidents and Close Calls
30th Jan 2018, 19:06
Replies: 420
Views: 145,526
Posted By Concours77

Hi. In the air, even in extremis,...

Hi.

In the air, even in extremis, aerodynamic surfaces do not lead, they follow. It is highly unlikely, IMO, that the remainder of the aircraft travelled at any time inverted and tail first. An...
Forum: Accidents and Close Calls
14th Jan 2018, 19:29
Replies: 420
Views: 145,526
Posted By Concours77

That is what I wanted to establish, that the...

That is what I wanted to establish, that the impact evidence is as observed. The flight path, not so much.

What do you make of the Lockheed experiment regarding possible conflict of expected...
Forum: Accidents and Close Calls
14th Jan 2018, 16:24
Replies: 420
Views: 145,526
Posted By Concours77

BRDubois Their haste may have contributed to...

BRDubois

Their haste may have contributed to the problem. If they had to wait a bit for clearance they might have noticed an issue. If already rolling and the issue wasn't waving a red flag in...
Forum: Accidents and Close Calls
14th Jan 2018, 16:06
Replies: 420
Views: 145,526
Posted By Concours77

G0ULI, Here: The aircraft travelled 380...

G0ULI,

Here:

The aircraft travelled 380 feet before making the first solid impact with the ground. Allowing for the descent to be in free fall, the time taken to hit the ground would be roughly...
Forum: Accidents and Close Calls
13th Jan 2018, 18:53
Replies: 420
Views: 145,526
Posted By Concours77

Thanks, your work is impeccable. The problem...

Thanks, your work is impeccable.

The problem started at run up, and was underway as they rolled onto the runway without stopping, cleared for an immediate departure.

They should have been at...
Forum: Accidents and Close Calls
13th Jan 2018, 14:12
Replies: 420
Views: 145,526
Posted By Concours77

In the Law, the “direct cause” is reasonably easy...

In the Law, the “direct cause” is reasonably easy to understand. Also in the Law is something a bit more difficult: The procuring cause.

Camel, straw? The direct cause is the last straw. The...
Forum: Accidents and Close Calls
13th Jan 2018, 14:09
Replies: 420
Views: 145,526
Posted By Concours77

“All the people involved are undoubtably deceased...

“All the people involved are undoubtably deceased and the fact is that in the light of this and other early accidents, the Electra and variants such as the Orion P3, has had a long and distinguished...
Forum: Accidents and Close Calls
12th Jan 2018, 15:03
Replies: 420
Views: 145,526
Posted By Concours77

My postulate is that the tail section and wing,...

My postulate is that the tail section and wing, attached and sliding (upright) landing gear forward, dropped into the ditch, snagged, and the assembly “pitch poled” to land as found.

This demands...
Forum: Accidents and Close Calls
12th Jan 2018, 14:50
Replies: 420
Views: 145,526
Posted By Concours77

Writing a report

The report states, (paraphrased), that the cabling from the Starboard flight station in the area of the boost quadrant “......was not recovered....”

It also infers that the aft connector “punched...
Forum: Accidents and Close Calls
11th Jan 2018, 19:54
Replies: 420
Views: 145,526
Posted By Concours77

Fantastic. Other than everything available, I am...

Fantastic. Other than everything available, I am interested in any data on NW shop rating, the Electra’s pilot reports, Lockheed designs, (l found a patent on the slack absorber). All field data on...
Forum: Accidents and Close Calls
11th Jan 2018, 17:56
Replies: 420
Views: 145,526
Posted By Concours77

Any feedback on the FOIA request?

Any feedback on the FOIA request?
Forum: Accidents and Close Calls
11th Jan 2018, 15:06
Replies: 420
Views: 145,526
Posted By Concours77

For G0ULI

“This was the only recorded accident involving an Electra that involved loss of aileron control....”

Thanks G0ULI.

I think that’s right. However, you don’t mention the many aileron issues (all...
Forum: Accidents and Close Calls
11th Jan 2018, 14:56
Replies: 420
Views: 145,526
Posted By Concours77

megan A boost unit has a failure mode called...

megan

A boost unit has a failure mode called a "hardover", where hydraulic pressure causes the boost to drive to the limit in one direction or the other. The simple remedy is to remove hydraulic...
Forum: Accidents and Close Calls
10th Jan 2018, 23:03
Replies: 420
Views: 145,526
Posted By Concours77

Simply this: Without any commanded Roll, the...

Simply this:

Without any commanded Roll, the Aileron Boost pumps shut down when the Aileron Boost Handle is pulled, and both ailerons are supposed to cycle home. When the co-pilot stated “no...
Forum: Accidents and Close Calls
10th Jan 2018, 15:27
Replies: 420
Views: 145,526
Posted By Concours77

No, actually all it means is that of all the...

No, actually all it means is that of all the written squawks by pilots of this aircraft involving aileron issues, Lockheed did the work necessary to bird dog the squawks, isolate, identify, and...
Forum: Accidents and Close Calls
10th Jan 2018, 13:31
Replies: 420
Views: 145,526
Posted By Concours77

Good morning megan and G0ULI I submit loss...

Good morning megan and G0ULI

I submit loss of aileron Control was the direct cause of the accident.

You’ll get no argument from me.

The flight path and the forensics are conclusive. Without...
Forum: Accidents and Close Calls
9th Jan 2018, 14:40
Replies: 420
Views: 145,526
Posted By Concours77

The report should have read “Pilots’ “ rather...

The report should have read “Pilots’ “ rather than “Pilot’s”. “Pilot’s” is singular possessive, and means it was Captain’s cable that separated. In any case, there was only one pilot on board, the...
Forum: Accidents and Close Calls
8th Jan 2018, 18:05
Replies: 420
Views: 145,526
Posted By Concours77

I have been eagerly awaiting your response,...

I have been eagerly awaiting your response, expecting something like the ‘misunderstanding’ of the report is mine.

In your response, you have added a comma.

That is dishonest.

We are done.
...
Forum: Accidents and Close Calls
8th Jan 2018, 16:11
Replies: 420
Views: 145,526
Posted By Concours77

megan

Also on page fifteen, just above the signatures, it is “co-pilot” cable that separates.....

EDIT.
megan,
So. If Co-pilot cable separated, left wing down was available. That is, if the report is...
Forum: Accidents and Close Calls
8th Jan 2018, 14:02
Replies: 420
Views: 145,526
Posted By Concours77

Provenance

Source is stamped on the upper margin. Based in Switzerland, and I make no representations as to authenticity of the contents.

Thanks for asking. Yes, it is single spaced. Yes it appears to...
Forum: Accidents and Close Calls
7th Jan 2018, 20:13
Replies: 420
Views: 145,526
Posted By Concours77

CAB, excerpts, flight 706 Final Report

Hi.

With respect, for megan

G0ULI excellent and extremely well written synopsis of the accident.
Showing results 1 to 35 of 101
 
Page 1 of 3
1
2
3


 
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.