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Search: Posts Made By: DaveReidUK
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Forum: Rumours & News
9th Nov 2015, 22:20
Replies: 2,082
Views: 2,497,087
Posted By DaveReidUK

Yes, from time to time. For example the...

Yes, from time to time.

For example the Arrow Air DC-8 that crashed at Gander in December 1985 - the probable cause in the Canadian investigation report (ice contamination, leading to a stall) was...
Forum: Rumours & News
9th Nov 2015, 08:13
Replies: 2,082
Views: 2,497,087
Posted By DaveReidUK

It's inconceivable that investigators don't...

It's inconceivable that investigators don't already know whether it was or not.

But the announcement of their conclusions, whatever they may be, is now going to have to be carefully...
Forum: Rumours & News
8th Nov 2015, 16:23
Replies: 2,082
Views: 2,497,087
Posted By DaveReidUK

If a fuel/air explosion in the CWT or ACT was...

If a fuel/air explosion in the CWT or ACT was found to be the cause, the fallout wouldn't bear thinking about - both from the airworthiness point of view (all Airbus narrow-bodies grounded?) and...
Forum: Rumours & News
8th Nov 2015, 10:16
Replies: 2,082
Views: 2,497,087
Posted By DaveReidUK

You might want to bear in mind firstly that those...

You might want to bear in mind firstly that those are track, not heading, values (FR24 appears not to know the difference and uses both terms interchangeably).

Secondly, and more importantly, the...
Forum: Rumours & News
7th Nov 2015, 19:19
Replies: 2,082
Views: 2,497,087
Posted By DaveReidUK

In a heavily moderated thread like this one, it's...

In a heavily moderated thread like this one, it's pointless referring to posts by number as they may well get renumbered due to previous posts being deleted.

Use the Permalink facility and we'll...
Forum: Rumours & News
6th Nov 2015, 14:41
Replies: 2,082
Views: 2,497,087
Posted By DaveReidUK

The British Ambassador, interviewed by the BBC at...

The British Ambassador, interviewed by the BBC at SSH earlier today said, through gritted teeth, that the Egyptians were being very cooperative.

Very diplomatic.

A later phone conversation with...
Forum: Rumours & News
3rd Nov 2015, 22:50
Replies: 2,082
Views: 2,497,087
Posted By DaveReidUK

No, ADS-B altitude is normally barometric,...

No, ADS-B altitude is normally barometric, although there is provision in the spec for sending GNSS height.

Groundspeed is, of course, GPS-derived, as is true track. FR24 appear to use the terms...
Forum: Rumours & News
3rd Nov 2015, 06:48
Replies: 2,082
Views: 2,497,087
Posted By DaveReidUK

Do both of the access doors function as blowout...

Do both of the access doors function as blowout panels, or just the one that we know didn't open?
Forum: Rumours & News
2nd Nov 2015, 16:41
Replies: 2,082
Views: 2,497,087
Posted By DaveReidUK

some slightly amended notes on ADS-B

Good summary of ADS-B. But just to clarify "3d-position, 3d-vector and aircraft ID" are all sent in separate broadcasts as they can't all be accommodated in a single 56-bit packet.

That's one of...
Forum: Rumours & News
1st Nov 2015, 21:48
Replies: 2,082
Views: 2,497,087
Posted By DaveReidUK

Substitute "Boeing" for "Airbus" and that...

Substitute "Boeing" for "Airbus" and that assumption could equally have been made (at the time of the repair) in respect of both the JAL 747SR and the Air China 747-200.

In both of those cases...
Forum: Rumours & News
1st Nov 2015, 12:30
Replies: 2,082
Views: 2,497,087
Posted By DaveReidUK

That description doesn't fit the circumstances...

That description doesn't fit the circumstances under which any TriStar losses occurred. Are you thinking of the DC-10, perhaps?
Forum: Rumours & News
1st Nov 2015, 11:58
Replies: 2,082
Views: 2,497,087
Posted By DaveReidUK

The aircraft reportedly went back into service in...

The aircraft reportedly went back into service in mid-February 2002, some 3 months later. So even allowing for a bit of initial argy-bargying over the repair scheme and the admin, it sounds like...
Forum: Rumours & News
1st Nov 2015, 07:19
Replies: 2,082
Views: 2,497,087
Posted By DaveReidUK

What you are describing is of course a function...

What you are describing is of course a function of the software that's displaying the received data, not the receiver itself.

And it's not necessarily related to "incomplete packets".

Those...
Forum: Rumours & News
31st Oct 2015, 22:52
Replies: 2,082
Views: 2,497,087
Posted By DaveReidUK

As would many of us, I suspect. Bear in mind...

As would many of us, I suspect.

Bear in mind that 7 years elapsed between the JAL 747SR tailstrike and the Mount Osutaka crash.
Forum: Rumours & News
31st Oct 2015, 21:49
Replies: 2,082
Views: 2,497,087
Posted By DaveReidUK

ADS-B does not have a native timestamp (ie one...

ADS-B does not have a native timestamp (ie one transmitted as part of the data packet).

Obviously at the point of reception one can be added by the receiver software and/or by the server that...
Forum: Rumours & News
31st Oct 2015, 20:39
Replies: 2,082
Views: 2,497,087
Posted By DaveReidUK

Then it's even less likely to be synchronised...

Then it's even less likely to be synchronised across different receivers. The basic ADS-B data that most of them supply to FR24 is timestamped by using the PC's clock. We all know how accurate...
Forum: Rumours & News
31st Oct 2015, 17:43
Replies: 2,082
Views: 2,497,087
Posted By DaveReidUK

Moreover, FR24 data is not synchronous, it's...

Moreover, FR24 data is not synchronous, it's subject to whatever latency exists in the Internet connection between the enthusiast's receiver and the server.

That's particularly apparent in this...
Forum: Rumours & News
31st Oct 2015, 12:22
Replies: 2,082
Views: 2,497,087
Posted By DaveReidUK

We don't know that ADS-B data stopped being sent,...

We don't know that ADS-B data stopped being sent, only that FlightRadar24 stopped receiving it, which isn't the same thing and may simply be a receiver range vs altitude issue.



Hard to avoid...
Forum: Rumours & News
31st Oct 2015, 10:42
Replies: 2,082
Views: 2,497,087
Posted By DaveReidUK

No, the State of registry only has responsibility...

No, the State of registry only has responsibility for an investigation if the occurrence takes place outside the territory of any State.

The AAIU's status will be that of an accredited...
Forum: Rumours & News
31st Oct 2015, 10:35
Replies: 2,082
Views: 2,497,087
Posted By DaveReidUK

Looking at the revised FR24 data linked in post...

Looking at the revised FR24 data linked in post #40, that reported temporary excursion to FL330 is almost certainly spurious.
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