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747 Engine Instruments  
User currently offlineNW747-400 From United States of America, joined Jun 1999, 502 posts, RR: 0
Posted (14 years 8 months 2 weeks 2 days 6 hours ago) and read 1855 times:

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?

4 replies: All unread, jump to last
 
User currently offlineIainhol From , joined Dec 1969, posts, RR:
Reply 1, posted (14 years 8 months 2 weeks 2 days 5 hours ago) and read 1793 times:

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


User currently onlineBryanG From United States of America, joined May 1999, 433 posts, RR: 0
Reply 2, posted (14 years 8 months 2 weeks 2 days 3 hours ago) and read 1790 times:

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.

User currently offlineLAVOS From , joined Dec 1969, posts, RR:
Reply 3, posted (14 years 8 months 2 weeks 2 days ago) and read 1786 times:

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.


User currently offlineBuzz From United States of America, joined Nov 1999, 697 posts, RR: 21
Reply 4, posted (14 years 8 months 1 week 6 days 18 hours ago) and read 1772 times:

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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