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Search: Posts Made By: Robin Clark
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7th May 2014, 14:44
Replies: 11,824
Views: 21,438,871
Posted By Robin Clark

BFO and Doppler........

So this is the updated chart , a bit less cluttered , showing the original BFO curve in blue , and with it a brown line illustrating how the values can change when the satellite motion is removed...
5th May 2014, 20:26
Replies: 11,824
Views: 21,438,871
Posted By Robin Clark

Pingology...

I have made attempted to account for all motion between the aircraft and the satellite..
The Inmarsat 3F1 was moving very slowly westward during the whole flight , this was not enough to...
4th May 2014, 23:18
Replies: 11,824
Views: 21,438,871
Posted By Robin Clark

Pingology....

Further to my #10413 .......did some trig. and found that the satellite should have been on a bearing of 73.17 degrees to port as MH370 was on climbout ........so in fact they were flying partly...
30th Apr 2014, 07:39
Replies: 11,824
Views: 21,438,871
Posted By Robin Clark

Pingology.........

The more I look at the Inmarsat BFO chart the more it seems to be wrong...........almost as if the function is inverted , and the higher values towards the top of the chart are when the satellite and...
31st Mar 2014, 21:15
Replies: 11,824
Views: 21,438,871
Posted By Robin Clark

Ping timing...

Although the timing of the last few pings does support a relatively straight line flight , surely it is not the only solution ...????....... The last four complete pings only really show that the...
28th Mar 2014, 11:58
Replies: 11,824
Views: 21,438,871
Posted By Robin Clark

Ping Data

.....until debris is found to confirm the straight line flight suspected , the ping data may still support the possiblilty that the plane was flying large orbits , about 50 minutes each , south of...
24th Mar 2014, 21:08
Replies: 11,824
Views: 21,438,871
Posted By Robin Clark

Hamster3null

........nice info on the satellite from MM43 and the others . .........can I just add that the system is not nearly as symmetrical as you might think..the earth is not a sphere and has an equatorial...
Forum: Rotorheads
18th Jul 2011, 12:12
Replies: 5,669
Views: 4,166,301
Posted By Robin Clark

The Shadow

whoateallthepies.....

....in studying the photo carefully it is the shadow of the next blade..... which disappears off screen to the right.......which is cast on the ground.....
..I do agree that...
17th Jul 2011, 21:43
Replies: 8,153
Views: 1,053,594
Posted By Robin Clark

Various

..congrats to all the campaigners , good outcome.....

..for the sake of completeness there are a couple of observations I would like to put on record before the thread is closed....

...there...
28th Jun 2011, 09:03
Replies: 8,153
Views: 1,053,594
Posted By Robin Clark

Track........

Walt...
you are making the same mistake that Mitchell makes in the Boeing report.....
...from V813 to the Real lighthouse is a bearing of 19.78 degrees true , plus the variation for your sums.....
27th Jun 2011, 22:57
Replies: 8,153
Views: 1,053,594
Posted By Robin Clark

Various.....

The Switches...Are we entirely sure that the switch shown in the photo is actually the power switch for the Tans alone.??????????......it is an appendage piggy-backed to the Tans and extends across...
25th Mar 2011, 21:54
Replies: 8,153
Views: 1,053,594
Posted By Robin Clark

Time and motion

Tuc.
I thought that the time difference between the Trimble and Supertans was understood and thought to be insignificant........??????.......
..the gps unit has its own time clock , fed from the...
3rd Mar 2011, 09:53
Replies: 8,153
Views: 1,053,594
Posted By Robin Clark

Flashgun tests...

I now realise that I neglected to mention ..... that my flashgun tests were done at mid-day .....................at the time of the crash , the sun was 29.6 degrees above the horizon , which equates...
23rd Feb 2011, 12:51
Replies: 8,153
Views: 1,053,594
Posted By Robin Clark

spreadsheet---cameras

guys......in response to PM's I have expanded the guide to my speed/time/distance spreadsheet , hopefully making it easier to understand........link is here......
10th Dec 2010, 19:07
Replies: 8,153
Views: 1,053,594
Posted By Robin Clark

Various responses

Just a reminder as per my post 6641 , page 333 , the only relevant met.information available to the crew apon which to base a choice of route were the TAF and METAR for Machrihanish , ten nautical...
20th Oct 2010, 12:45
Replies: 8,153
Views: 1,053,594
Posted By Robin Clark

Yet more on maps......

Boac ,Dalek and others.....
Guys............. I understand entirely that they may normally only have used the Supertans as a rough guide , there have been several quotes about choosing a place with...
11th Oct 2010, 13:13
Replies: 8,153
Views: 1,053,594
Posted By Robin Clark

More on Maps........

I have always had a gut feeling that navigation accuracy played a big part in the crash , whatever other problems there were with the Chinook..........

The waypoint 'A' position has always...
28th Sep 2010, 14:25
Replies: 8,153
Views: 1,053,594
Posted By Robin Clark

That Boeing report and more on speeds.....

The Boeing report by James Mitchell is mentioned quite often and it is a useful guide , but study it with caution as it does contain errors.....
.............perhaps the most obvious is his lack of...
20th Sep 2010, 15:27
Replies: 8,153
Views: 1,053,594
Posted By Robin Clark

more on time distance and speed......

..in the Excel spreadsheet below the fatal route is split into four legs...
http://gneiss.dyndns.info/chinookspread.bmp


...and allows one to adjust the speed for each leg....the point being...
13th Sep 2010, 19:09
Replies: 8,153
Views: 1,053,594
Posted By Robin Clark

dalek , your 6738,6775,6796 ..... the...

dalek , your 6738,6775,6796

..... the overall accuracy of the Stans was nothing like as good as you surmise , the Racal report only tells half of the story........
Although the GPS and Doppler...
31st Aug 2010, 18:03
Replies: 8,153
Views: 1,053,594
Posted By Robin Clark

JP ...I find that I must take issue with your...

JP ...I find that I must take issue with your 6770......although I agree with you that they were off course and heading for high ground...............I think that the Foghorn confusion is unlikely to...
1st Aug 2010, 22:20
Replies: 8,153
Views: 1,053,594
Posted By Robin Clark

Weather.........

BEagle...

I think this "often used" quote is actually someone's interpretation of the TAF for Machrihanish which really said.......



..there was a very similar actual from Machrihanish as...
22nd Jul 2010, 12:17
Replies: 8,153
Views: 1,053,594
Posted By Robin Clark

More on maps.......

..in ACM Day's slides which he presented to the HOL....one of the mistakes he makes is assuming the OS grid on a map of the Mull is aligned with true north......(slides 25,25a,25b)
..this is a...
22nd Jul 2010, 11:54
Replies: 8,153
Views: 1,053,594
Posted By Robin Clark

The Mythical Turn.....

Walter.......
...the request was for a list of co-ordinates you used........a diatribe about headings does not show anything....


....plot them on a map or use software , I prefer a Garmin...
22nd Jul 2010, 09:22
Replies: 8,153
Views: 1,053,594
Posted By Robin Clark

AFCS limits.......

Mmmmnice


..thanks for that...but I am still confused......the manuals read as though it is 'gated' and not just cautionary advice......and block diagrams of the Chinook AFCS show an input from...
Showing results 1 to 25 of 51
 


 
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