Ah well this system might have stopped you crashing Tom, but it actually caused me to crash. When I got the M5 with all this widescreen bolx and it was about a month old I was going round the 5-lane Aldwych in London after a tcm visit I think and was demo-ing the functions on the satnav. I was also driving, erk. I smashed into a toyota and the front left bit of the car needed 2 grands worth of filling and headlight, bumper stuff. Easily done, I assure you. If all the computer stuff was any good it should have bleeped to warn me ;-)
1}the mud slithering properties of the Nicholson are legendary
2)your large friend is of a specially adapted type, perfect for hanging off boom when Nicholson slithers into mud
3)please do not supply any more ammo to antipodean wretches obsessed with ground plates. In my experience they can stick up for themselves
4)the reason this rather silly post has not had an earlier reply is that your correspondent has been tied up preparing important and uplifting hospital drama rubbish through which the BBC will explain govmnt policy. This is very worthwhile.
5) I was out tacking up the Colne on Sunday while yous were off showing BigNick how to pre-bend the prebend by mounting the mast. Ban this filth
6) Fray Bentos is not all that good
7)Vacqueyras is very good
8)Nuff said
9) What's this stuff about navigation?
10) I'd rather take navigation lessons off my Jack Russell than you
11) My Jack Russell knows what to do with a scotchman
12) Nuff said (again)
Ummm.... I did say "except PERHAPS submarines" on the gounds that I have no idea how subs navigate but I imagine they would have a problem receiving any external references/signals so I would have thought inertial would be one possible solution...... So what do subs use then?
Paul.
<hr width=100% size=1>I used to have an open mind but my brains kept falling out.....
All you say about laser gyros and AHRS is spot on.... I was trying to keep it simple! On an historical note though, the first aircraft I flew that used inertial was the 707 which used the old Carrousel system. On that course (in 1977, by which time it was already out of date!) we were definitely told that it had been developed in the first instance for the Space programme. I guess it doesn't really matter..... but if you know better, I stand corrected!
Paul.
<hr width=100% size=1>I used to have an open mind but my brains kept falling out.....
The first IN system was developed by the Peenemunde group under the leadership of Dr Wehner von Braun. It was used in the V2 missile which was the pre-cursor to the later US space vehicles. In the meantime, it was adapted for aircraft and this became it''s most common use. Von Braun went on to head up the IN group at NASA. The Autonetics division of North American Aviation adapted one of its systems for shipborne use, and in 1958 it was fitted to the sub USS Nautilus and famously used to navigate under the ice to the North Pole.
I worked on IN/AHRS design for a number of years for aircraft and saw it reduce from the size of a tea-chest to the size of a shoebox over a short period once the mechanical gyros and gimbals were ditched.
We now also use it in a backpack for survey, slaved to RTK GPS, in areas such as jungle where the canopy can block the GPS signals.