NW747-400
Topic Author
Posts: 366
Joined: Tue Jun 08, 1999 4:42 am

747 Engine Instruments

Fri Jan 07, 2000 10:49 am

Why do later 7472s and all 743s have gauges that resemble those on the -400s except they are not digital while 741s and early 742s have traditional "steam" gauges?
 
Guest

RE: 747 Engine Instruments

Fri Jan 07, 2000 11:47 am

The 747-100/200/300 have the older model gauges like little clocks. Some have digital parts at the bottom but that was the later 100/200/300. The 747-400 has a completely redesigned cockpit known as a glass cockpit it has screens that are little TV's that show all the engine stuff and much more!
Iain
 
BryanG
Posts: 955
Joined: Tue May 18, 1999 2:59 am

RE: 747 Engine Instruments

Fri Jan 07, 2000 1:57 pm

I've seen two major designs for the engine instruments on the older 747s. The first is the traditional dial arrangement, which I've seen on 747-100s, -200s, and -300s. On some of the -200s and -300s, I've seen vertical bar "tape" instruments in place of the dials. I'm sure there are pictures of both on airliners.net. Some airlines have also upgraded the original instruments. On a picture of a Northwest 747-200 once I saw where they had torn out the analog engine instruments and filled the space with a digital screen.
 
Guest

RE: 747 Engine Instruments

Fri Jan 07, 2000 4:20 pm

Hello, when the first 747-100's were delivered to the customers they could choose wich avionics they wanted and as a result almost all 747-classic cockpits look different, some airlines choosed the vertical tape style instrument as there engine gauges because the engine indications could easier be compared then when you use a round one, the round instruments used more space on the instrument panel to.
This revolution from round to vertical tape instruments could be seen in other instruments to, for instance the radio-altimeter, while most 747-operators had round engine instruments and a vertical tape radio altimeter KLM has Vertical tape engine instruments and a round Radio-altimeter.
With the 737-300 and 757/767 an airspeed tape apeared aside the ADI and in the 747-400 almost everything was vertical tape-style wich was off course a big step for pilots that were used to the classic dials.
Mc-Donnel Douglas gave there operators a choice on the MD-11 with the touch of a button they could change from vertical tape to round engine instruments.
You can see the dials coming back on the ADI too in the newest avionics suites for the smaller bizjets.

Regards Marco Blauwhof

BryanG wrote:
-------------------------------
I've seen two major designs for the engine instruments on the older 747s. The first is the traditional dial arrangement, which I've seen on 747-100s, -200s, and -300s. On some of the -200s and -300s, I've seen vertical bar "tape" instruments in place of the dials. I'm sure there are pictures of both on airliners.net. Some airlines have also upgraded the original instruments. On a picture of a Northwest 747-200 once I saw where they had torn out the analog engine instruments and filled the space with a digital screen.
 
Buzz
Posts: 694
Joined: Sun Nov 21, 1999 11:44 pm

RE: 747 Engine Instruments

Sun Jan 09, 2000 10:36 pm

Excellent answer Marcos!, Buzz here. If i may add, that it's easier to make video games (digital displays) than make lots of little delicate gauges. On DC-8's we'd swap gauges in the cockpit as a form of troubleshooting.
When i was small, the vertical tape displays were preferred by the military as a way to save 'cockpit real estate'. Yes you can notice an odd reading a little faster. But later computer driven screens provided the flexibility to arrange the instruments in more logical ways. So we've got the video game displays. I've noticed they're pretty reliable.
g'day

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