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Search: Posts Made By: physicus
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7th Apr 2022, 08:44
Replies: 180
Views: 90,845
Posted By physicus

To get back on topic - below is a brief analysis...

To get back on topic - below is a brief analysis of the ADS-B data for said event. The only thing sticking out is the dropout of IAS messages. The likely cause however has nothing the do with the...
14th Jan 2022, 02:30
Replies: 87
Views: 44,172
Posted By physicus

That makes a lot of sense - I suspect you're not...

That makes a lot of sense - I suspect you're not the only one. Was flying EK A388 as pax the other night and noticed on line up the airframe was not centred and at an angle while lined up and...
7th Jan 2022, 23:23
Replies: 180
Views: 44,962
Posted By physicus

What's truly interesting about this is that...

What's truly interesting about this is that incumbent services should enjoy protection from harmful interference from new services regardless of whether said interference is intentional or not. This...
13th Nov 2021, 09:34
Replies: 49
Views: 16,512
Posted By physicus

Speaking as pax, QF's only first class is in the...

Speaking as pax, QF's only first class is in the A380. If they want to retain PO's and other VVIP flyers they'll need to offer first on the Europe/US routes, so the 380 is going to stick around until...
Forum: Tech Log
20th Sep 2021, 07:52
Replies: 7
Views: 1,900
Posted By physicus

Thanks guys. I found the specs in ARINC 716 and...

Thanks guys. I found the specs in ARINC 716 and ARINC 750. Max permissible transmit power is 40W, and 25-40W is what appears to be built into most bizjet and larger aircraft. VHF3 is in fact a lower...
Forum: Tech Log
19th Sep 2021, 10:15
Replies: 7
Views: 1,900
Posted By physicus

VHF transmitter power

Most airliners have 3 VHF radios, 1+2 are usually identical, and VHF 3 is a lower power unit chiefly used for ACARS data comms.

I had a browse of my old FCOMs but can't find those details, perhaps...
18th Jun 2021, 23:49
Replies: 264
Views: 86,481
Posted By physicus

I've been intimately involved with AP testing and...

I've been intimately involved with AP testing and development for automotive applications for some years now. I can safely say that it is a far more complex problem than automating airplane movements...
10th Jan 2021, 05:24
Replies: 872
Views: 906,007
Posted By physicus

Here's a better plot with infrared satellite...

Here's a better plot with infrared satellite overlay. While they almost certainly were in IMC when the problem occurred, it doesn't look like they came close to significant CBs.
...
9th Jan 2021, 12:06
Replies: 872
Views: 906,007
Posted By physicus

No significant convective activity visible in the...

No significant convective activity visible in the 07:40 UTC high res satellite imagery.
...
17th Sep 2020, 13:01
Replies: 9
Views: 3,704
Posted By physicus

The linguistic variety on our planet is...

The linguistic variety on our planet is fantastic. Chuchichäschtli!
20th Jul 2020, 20:30
Replies: 37
Views: 7,653
Posted By physicus

Any SEP is easily controlled using pitch trim...

Any SEP is easily controlled using pitch trim only should the elevator get jammed, and that training was part of the syllabus when I got mine 20 or so years ago, so it's certainly no reason to panic....
Forum: Tech Log
22nd Jun 2020, 00:29
Replies: 15
Views: 1,414
Posted By physicus

Yes that is correct. Your GNSS receiver can use...

Yes that is correct. Your GNSS receiver can use the GPS (formerly NAVSTAR), GLONASS, Galileo, Beidou, or any combination of those systems satellites depending on the receiver's capabilities to...
Forum: Tech Log
21st Jun 2020, 21:16
Replies: 15
Views: 1,414
Posted By physicus

It actually doesn't. WAAS (as well as all other...

It actually doesn't. WAAS (as well as all other SBAS) make use of geostationary satellites to transmit the correction signal, while the GNSS satellites themselves are in medium earth orbit (MEO).
Forum: Tech Log
21st Jun 2020, 03:20
Replies: 15
Views: 1,414
Posted By physicus

EGNOS, MSAS, GAGAN, and WAAS are all satellite...

EGNOS, MSAS, GAGAN, and WAAS are all satellite based augmentation systems (SBAS): https://en.wikipedia.org/wiki/European_Geostationary_Navigation_Overlay_Service
6th May 2020, 05:25
Replies: 82
Views: 32,300
Posted By physicus

The QF fleet is too old, Alan has let that slip...

The QF fleet is too old, Alan has let that slip during his reign in my view for far too long to make the bottom line look better. And along the same line, the level of cabin quality I'm offered in F...
5th May 2020, 06:00
Replies: 82
Views: 32,300
Posted By physicus

Speaking as PAX, QF have to be very careful or...

Speaking as PAX, QF have to be very careful or they will lose their top end travellers if they phase out the A380 too early without an adequate replacement. Their 787 interior is the worst J class...
24th Jan 2020, 07:15
Replies: 355
Views: 299,306
Posted By physicus

Many if not most posters here don’t understand...

Many if not most posters here don’t understand what ADS-B is, and how public sites such as ADSBExchange/Flightaware/Flightradar/Radarbox/RealTraffic alter that data (or not). This results in two...
9th Jan 2020, 12:26
Replies: 683
Views: 1,673,681
Posted By physicus

DaveReidUK the profile you posted looks like a...

DaveReidUK the profile you posted looks like a perfectly normal takeoff profile including acceleration phase. or am I missing something?
6th Jan 2020, 23:59
Replies: 53
Views: 13,378
Posted By physicus

I found any math I needed to do in a cockpit was...

I found any math I needed to do in a cockpit was easy enough to do in my head or on a notepad. Very analog. The other thing I often use is a stop watch. And thirdly, the only thing I consistently...
6th Jan 2020, 02:51
Replies: 64
Views: 43,892
Posted By physicus

UltraFan Pure carbon fibre is a good conductor...

UltraFan Pure carbon fibre is a good conductor indeed, but as GordonR_Cape points out, this only works if the CF is bonded at a molecular level. CF in that state is also extremely brittle, which is...
3rd Jan 2020, 10:59
Replies: 19
Views: 5,475
Posted By physicus

MurphyWasRight Indeed with GNSS signals what...

MurphyWasRight Indeed with GNSS signals what matters is the signal path between transmitter and receiver and any path delays induced by hot air pockets (doesn't have to be absolute temperature hot,...
31st Dec 2019, 08:27
Replies: 19
Views: 5,475
Posted By physicus

There are multiple effects caused by fire that...

There are multiple effects caused by fire that have an effect on electromagnetic signal propagation. Someone wrote a PhD thesis on this: https://researchonline.jcu.edu.au/2028/2/02whole.pdf

The...
17th Dec 2019, 01:45
Replies: 49
Views: 26,756
Posted By physicus

hoss183 Switzerland is the only truly democratic...

hoss183 Switzerland is the only truly democratic country in the world, and to rag their decision not to spend money on fighter jets because it contravenes your opinion is, well, undemocratic. The...
15th Dec 2019, 04:11
Replies: 73
Views: 59,081
Posted By physicus

QF's fleet is the oldest on average when compared...

QF's fleet is the oldest on average when compared with their main competitors. They stopped buying new airplanes to prop up the bottom line. Increased probability of malfunctions are the result.
...
8th Nov 2019, 11:45
Replies: 86
Views: 67,315
Posted By physicus

In the 744 sim both outflow valves open and with...

In the 744 sim both outflow valves open and with all packs running results in a 4000fpm cabin ROC. One outflow valve is about the size of four windows... I would infer from this that the packs can...
6th Nov 2019, 15:38
Replies: 50
Views: 35,739
Posted By physicus

You can file any flight plan you wish, as often...

You can file any flight plan you wish, as often demonstrated in the US by certification flights "painting" logos and letters into flight tracking paths. Perhaps even more impressively, NASA's SOFIA...
6th Nov 2019, 13:30
Replies: 27
Views: 10,981
Posted By physicus

Add auto takeoff and we can do away with all...

Add auto takeoff and we can do away with all those knobs and buttons. And the persons claiming to fly the things. :)
6th Nov 2019, 13:11
Replies: 86
Views: 67,315
Posted By physicus

The pyrotechnically activated O2 bottles would...

The pyrotechnically activated O2 bottles would have a certified lifetime beyond which they need replaced, but they evidently wouldn't be tested in the mean time as they are single use by design....
6th Nov 2019, 06:07
Replies: 86
Views: 67,315
Posted By physicus

Indeed they were, as per the article, and 25%...

Indeed they were, as per the article, and 25% were shown to fail. A problem which the whistleblower reported to the FAA after Boeing didn't do anything about it. And neither did the FAA. The plot...
5th Nov 2019, 17:04
Replies: 50
Views: 35,739
Posted By physicus

I suspect they might have flown an FR24 receiver...

I suspect they might have flown an FR24 receiver on board with a realtime internet link through onboard wifi. I've done that before. The data is not present in another ADS-B network which has very...
5th Nov 2019, 13:51
Replies: 50
Views: 35,739
Posted By physicus

This is neat, if it was really done... What's...

This is neat, if it was really done... What's ADS-B coverage at 10'000ft out in the middle of the mediterranean like? It isn't, that's what it is like... They must have supplied the track data to...
3rd Nov 2019, 15:13
Replies: 93
Views: 64,687
Posted By physicus

The absence of a trusted traveller program...

The absence of a trusted traveller program outside the US for someone like me who spends as much time flying as crew (but as pax) is appalling. I think we have it on pretty good authority that...
Forum: Tech Log
31st Oct 2019, 16:32
Replies: 360
Views: 535,909
Posted By physicus

Do we know which airframes QF has grounded?

Do we know which airframes QF has grounded?
20th Oct 2019, 11:18
Replies: 84
Views: 87,725
Posted By physicus

S2000 does have beta reverse and excellent short...

S2000 does have beta reverse and excellent short field performance. It's so well (over)powered the yaw damper is on the MEL...
Forum: Tech Log
2nd Oct 2019, 08:49
Replies: 0
Views: 1,488
Posted By physicus

A350 vs B787 handling qualities from pilot's perspective

having flown neither as crew, yet both as PAX for a couple of hundred hours each, I have a significantly non random opinion on those two airframes from a comfort/noise perspective.

I am however...
Showing results 1 to 35 of 134
 


 
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