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Search: Posts Made By: keith smith
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Forum: Tech Log
9th Jun 2010, 00:37
Replies: 6
Views: 2,407
Posted By keith smith

You may be technically corret, but I doubt there...

You may be technically corret, but I doubt there are many CatIII runways that don't boast a VASI/PAPI
Keith
Forum: Tech Log
22nd Apr 2010, 19:17
Replies: 36
Views: 3,993
Posted By keith smith

I think that you do have to track the spoofing...

I think that you do have to track the spoofing victim aircraft, at least at the point where you start the deception. The spoof signal must be the same as the real signal at the start point. Also...
Forum: Tech Log
21st Apr 2010, 20:48
Replies: 36
Views: 3,993
Posted By keith smith

1.I think GPS spoofing is much more difficult...

1.I think GPS spoofing is much more difficult than jamming.You need to be able to the track the victim aircraft so that you can radiate it with a false position that convincingly deviates from the...
Forum: Tech Log
21st Apr 2010, 01:43
Replies: 36
Views: 3,993
Posted By keith smith

Denti You are quite right to suggest that a...

Denti
You are quite right to suggest that a SATNAV backup must be agreed world wide. The two most important authorities for doing this are FAA and Eurocontrol. As far as I can see neither of these...
Forum: Tech Log
20th Apr 2010, 01:13
Replies: 36
Views: 3,993
Posted By keith smith

Denti I was thinking of the navigation...

Denti
I was thinking of the navigation situation in 10-15 years time when augmented versions of perhaps three constellations, plus ADS-B are available for all to use. With verything working (SESAR...
Forum: Tech Log
19th Apr 2010, 22:23
Replies: 36
Views: 3,993
Posted By keith smith

Microburst,Denti, GPS remains easy to jam, and...

Microburst,Denti,
GPS remains easy to jam, and neither form of augmentation can overcome that. Several trials have proved the susceptability to jamming. There is nogood in having a corrective signal...
Forum: Tech Log
18th Apr 2010, 18:47
Replies: 36
Views: 3,993
Posted By keith smith

mixing INS and GPS

The concept that INS is a good navigator in the short term but slowly drifts (typically 1nm/hr) while GPS is always accurate (how accurate depends on type of augmentation) is true.
But GPS is easily...
Forum: Tech Log
24th Feb 2010, 20:23
Replies: 3,893
Views: 1,240,388
Posted By keith smith

djp On 9th November you suggested active life...

djp
On 9th November you suggested active life of recorders on seabed could be extended by not transmitting active accoustic signals until active searching was observed. The degreeof extension...
Forum: Tech Log
28th Jan 2010, 06:17
Replies: 0
Views: 819
Posted By keith smith

How useful is SOIA?

Simultaneous Offset Instrument Approach, with its offset and inclined localiser(or "pseudo-localiser" using LAAS) and in combination with an advanced airfield radar and display (PRM) has been in...
Forum: Tech Log
23rd Oct 2009, 20:07
Replies: 1
Views: 794
Posted By keith smith

EGNOS

The European Commision recently and proudly announced that EGNOS was now providing an "open" service across Europe.I interpret the meaning of "open" as "use at your own peril". It promised a "safety...
Forum: Tech Log
8th Sep 2009, 15:49
Replies: 11
Views: 2,133
Posted By keith smith

Denti Iam pretty sure it hasn't reached civil...

Denti
Iam pretty sure it hasn't reached civil aviation yet, but is it practiced in the military side?
Forum: Tech Log
7th Sep 2009, 21:07
Replies: 11
Views: 2,133
Posted By keith smith

I cannot imagine anything more...

I cannot imagine anything more dangerous.:ugh:Many of the devices and systems that it is suggested be connected by this meansare in the category of safety of life.The threat of deliberate or...
19th Aug 2009, 01:53
Replies: 42
Views: 8,175
Posted By keith smith

Thumbs down GPS/Galileo "competition"

1.I know of no reason why Galileo should be superior to GPS,and anyrate it doesn't exist yet (just two demonstrators, the cheaper of which was from a UK university and saved the dayfrom losing...
Forum: Rotorheads
9th Aug 2009, 02:12
Replies: 218
Views: 47,691
Posted By keith smith

Spaceage, Yes. ADS-B can do this,and so many...

Spaceage,
Yes. ADS-B can do this,and so many other things.But to make the most you need both 'in' and 'out', and the latter seems to be on the back-burner.
I saw Blomburg in action, and was...
18th Jun 2009, 23:34
Replies: 129
Views: 49,141
Posted By keith smith

Unhappy What happens when there are only two pilots on...

What happens when there are only two pilots on the flight deck (third is in the loo)and the disabled pilot collapses on the yoke. Flight deck door is locked on flight deck side (as per FAA and other...
Forum: Tech Log
2nd Jun 2009, 23:54
Replies: 3
Views: 1,390
Posted By keith smith

Unhappy Apart from the physical integrity problem, there...

Apart from the physical integrity problem, there is the daunting shear data rate problem. Modern flight recorders record a vast number of parameters(thanks toflash memory) at different intervals,but...
Forum: Tech Log
22nd May 2009, 03:58
Replies: 21
Views: 4,996
Posted By keith smith

411A WAAS was certificated about 5-6 years ago,...

411A
WAAS was certificated about 5-6 years ago, and individual approaches have to be cleared.The European equivalent (EGNOS)also based on GPS still hasn.t been cleared
Keith
Forum: Tech Log
22nd May 2009, 01:57
Replies: 21
Views: 4,996
Posted By keith smith

Jamming Satnav

GPS or any SatNav is very susceptible to simple jamming,and with high powered jammers (fairly readily made) and suicidal terrorists a major TMA could be taken out for some time.
Everbody agrees...
Forum: Tech Log
21st May 2009, 20:26
Replies: 21
Views: 4,996
Posted By keith smith

1.I believe the GAO report is unduly...

1.I believe the GAO report is unduly pessimistic,written by people whose knowledge of satellite navigation is limited.they didn'trelate their predictions to RNP degradation,which is what matters to...
Forum: Tech Log
31st Mar 2009, 01:02
Replies: 52
Views: 9,957
Posted By keith smith

Mach diamond

Please see my entry no33.You can achieve positive lift on complete tailplaneand still have positive static stability of the complete aircraft, but it won't be very positive in most cases.
Keith
Forum: Tech Log
28th Mar 2009, 20:34
Replies: 52
Views: 9,957
Posted By keith smith

Red face It is possible to have positive lift on the...

It is possible to have positive lift on the tailplane.This condition is met if the CG is aft of the centre of lift of the wing (roundabout quarter chord point) but not too far behind.This is because...
9th Feb 2009, 00:00
Replies: 2,018
Views: 929,578
Posted By keith smith

A red button display?

We all know that Sully and crew performed expertly and immaculately-but what would have happened if cloudbase had been a thousand feet? Is there a case , especially for crews that do not have a deep...
30th Jan 2009, 00:04
Replies: 2,018
Views: 929,578
Posted By keith smith

I wouldn't expect to see a final well thought-out...

I wouldn't expect to see a final well thought-out report from NTSB on this complex accident for some time. However,as quite often happens in the case of AAIB, there are some appropiate actions that...
Forum: Tech Log
24th Jan 2009, 18:37
Replies: 16
Views: 13,922
Posted By keith smith

Some points worth remembering: 1.Parasite drag...

Some points worth remembering:
1.Parasite drag equals induced drag at(L/D) max comes from simple algebra--para increases as V squared, while induced is inversely proportional to V squared....
Forum: Tech Log
16th Dec 2008, 01:27
Replies: 25
Views: 4,776
Posted By keith smith

Talking Hi there. This much easier to understand if...

Hi there. This much easier to understand if Icould draw a simple diagram, but I will try and describe things :
Lift L, dragD, Thrust T, Weight W, climb angle theta.
Assume thrust is along flight...
Showing results 1 to 25 of 49
 


 
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