Need help from a navigator!
Thread Starter
Join Date: May 1999
Location: Bristol, England
Age: 65
Posts: 1,806
Received 0 Likes
on
0 Posts
Need help from a navigator!
......I'm ashamed to say.
We have a very odd ATPL question relating to the manual construction of a minimum time route using isochronic lines. I can't find a reference for the technique and none of the schools can agree on the answer. Our tame nav only goes back as far as Pembrokes and DC3s and he says he's never had to do anything like this in his life.
Its on the Wannabes forum here .
All contributions gratefully received.
We have a very odd ATPL question relating to the manual construction of a minimum time route using isochronic lines. I can't find a reference for the technique and none of the schools can agree on the answer. Our tame nav only goes back as far as Pembrokes and DC3s and he says he's never had to do anything like this in his life.
Its on the Wannabes forum here .
All contributions gratefully received.
Join Date: Jul 2001
Location: New Zealand
Posts: 254
Likes: 0
Received 0 Likes
on
0 Posts
Alex, see if it makes sense to your tame Nav.
If not, then try www.google.com with the same request.
If not, then try www.google.com with the same request.
Thought you were a Nav, Alex??
Join Date: Feb 2003
Location: UK
Posts: 10
Likes: 0
Received 0 Likes
on
0 Posts
Need help from a navigator, Alex, but you're ashamed? Hope you find the answer soon.
All the best,
A Navigator who knows the answer but who can't be bothered answering a pilot who is ashamed of asking a navigator.
All the best,
A Navigator who knows the answer but who can't be bothered answering a pilot who is ashamed of asking a navigator.
Champagne anyone...?
He knows the answer!!!!! He must be witch!!!!!!
BURN HIM!!!
please...
It is, however, reassuring to discover that there are still navs out there that know about this sort of mediaeval garbage. Somewhat less reassuring to see that the ATPL examiners are still asking such irrelevant and outdated questions. I smell a navigator on the examining board.....
BURN HIM!!!
please...
It is, however, reassuring to discover that there are still navs out there that know about this sort of mediaeval garbage. Somewhat less reassuring to see that the ATPL examiners are still asking such irrelevant and outdated questions. I smell a navigator on the examining board.....
Ah, but Stoppers, once you've got your 2000 hrs total time of which 1500 is on the Herc (with not less than 1000 as Captain), then all you'd need to do for your ATPL is to get a Class 1 medical, have an IRT watched by a CAA Examiner....and pass ATPL Air Law. Oh - and cough the dosh!
Say thank you to your favourite ex-QFI for starting the ball rolling which led to that!
So no joys of isochronic confusion - but hours spent poring over the system of lights to be displayed by airships, the dimensions of the streamers to be displayed by tethered kites and some truly riveting stuff about the various international regulations etc etc....
Say thank you to your favourite ex-QFI for starting the ball rolling which led to that! So no joys of isochronic confusion - but hours spent poring over the system of lights to be displayed by airships, the dimensions of the streamers to be displayed by tethered kites and some truly riveting stuff about the various international regulations etc etc....
Thread Starter
Join Date: May 1999
Location: Bristol, England
Age: 65
Posts: 1,806
Received 0 Likes
on
0 Posts
Aw, go on Semicolon. Pretty please?
We've dusted of our copy of the Manual of Air Navigation but we can't decipher that chapter. My ex A Cat Nav has spent the last two days poring over it with furrowed brow occasionally making little 'hoom, hoom' noises.
We've dusted of our copy of the Manual of Air Navigation but we can't decipher that chapter. My ex A Cat Nav has spent the last two days poring over it with furrowed brow occasionally making little 'hoom, hoom' noises.
Join Date: May 2003
Location: Tracy Island
Posts: 532
Likes: 0
Received 0 Likes
on
0 Posts
Isochronic 
Never heard of it. Is it something you find in a can of lucozade ??
I thought the construction of MTT's was a product of pressure and temperature. Such a long time ago though.
FEBA
Never heard of it. Is it something you find in a can of lucozade ??
I thought the construction of MTT's was a product of pressure and temperature. Such a long time ago though.
FEBA
Join Date: Feb 2001
Location: A PC!
Posts: 594
Likes: 0
Received 0 Likes
on
0 Posts
D - I reckon.
You are trying to conmvert what happens in the air to what happens on the ground - this is done by adding/subtracting the effect of wind.
Mean wind is always used and, as you are looking ahead, surely it is the mean wind up to the next isochrone.
Well, that's the "applying logic" approach, anyway!
BTW - although I pilot, I reckon that having a grade B 'O' level pass in Air Navigation permits me to have Honorary Life Membership of SODCAT.
You are trying to conmvert what happens in the air to what happens on the ground - this is done by adding/subtracting the effect of wind.
Mean wind is always used and, as you are looking ahead, surely it is the mean wind up to the next isochrone.
Well, that's the "applying logic" approach, anyway!
BTW - although I pilot, I reckon that having a grade B 'O' level pass in Air Navigation permits me to have Honorary Life Membership of SODCAT.
BEags!
