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Search: Posts Made By: physicus
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24th Jan 2020, 07:15
Replies: 204
Views: 129,646
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: 577
Views: 1,481,699
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: 9,194
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: 36,656
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: 4,203
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: 4,203
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: 24,000
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: 55,467
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: 57,494
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: 29,776
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: 9,257
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: 57,494
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: 57,494
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: 29,776
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: 29,776
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: 94
Views: 57,610
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...
31st Oct 2019, 16:32
Replies: 357
Views: 462,826
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: 76
Views: 60,486
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: 956
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...
Forum: Rotorheads
18th Sep 2019, 00:02
Replies: 155
Views: 95,156
Posted By physicus

A very interesting contribution, thanks blakmax !...

A very interesting contribution, thanks blakmax ! I would imagine that bonding composites to non-composites has had a lot of research put into in the development of the latest Airbus and Boeing...
Forum: Rotorheads
15th Sep 2019, 08:24
Replies: 155
Views: 95,156
Posted By physicus

I was addressing a main rotor separation mostly...

I was addressing a main rotor separation mostly in the context of what others have suggested, I personally think that is an unlikely scenario. But other than being a professional physicist, a...
Forum: Rotorheads
12th Sep 2019, 21:33
Replies: 155
Views: 95,156
Posted By physicus

There always are two camps regarding tracking...

There always are two camps regarding tracking data release and accidents. I'm in the "some data is better than no data" camp - it provides a reference frame going beyond the obvious "it dropped off...
Forum: Rotorheads
9th Sep 2019, 13:10
Replies: 155
Views: 95,156
Posted By physicus

Check out the ADSB data above - the vertical...

Check out the ADSB data above - the vertical rates (those are barometric VSI derived, not GPS) are not indicative of a free-fall event.
Forum: Rotorheads
7th Sep 2019, 12:38
Replies: 155
Views: 95,156
Posted By physicus

Dick Smith as you can see on the screenshot above...

Dick Smith as you can see on the screenshot above they were not circling, but rather turning towards Williamtown before they descended in a sharp left turn. Assuming the Huey has a counterclockwise...
Forum: Rotorheads
7th Sep 2019, 07:30
Replies: 155
Views: 95,156
Posted By physicus

(updated ADS-B data with 10s interval data. A...

(updated ADS-B data with 10s interval data. A note on that: not every interval provides a full complement of the data. The only reliable indicator that data is fresh is if it has changed from the...
Showing results 1 to 25 of 120
 


 
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