canenguez
Topic Author
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Joined: Tue Aug 08, 2017 7:42 pm

Introduction of the FMC/CDU?

Wed Aug 09, 2017 7:16 pm

Hello. Does anyone know what year and plane the first FMC/CDU was introduced? I looked it up on Google, but came up with nothing.
 
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xms3200
Posts: 96
Joined: Sat Apr 30, 2005 7:13 am

Re: Introduction of the FMC/CDU?

Wed Aug 09, 2017 8:25 pm

1981 on the B767 & 1982 with the B757
 
canenguez
Topic Author
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Re: Introduction of the FMC/CDU?

Thu Aug 10, 2017 12:40 am

thanks!
 
BravoOne
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Re: Introduction of the FMC/CDU?

Thu Aug 10, 2017 1:28 am

There were number of hybrid systems running around in the DC10 (Collins AINS70) and another one in the L1011 that used a database for navigation and interfaced with a Carousel IV INS. Delta used the later in some, but not all of their L1011.

If you use the search function here at Airliners you can see some more information on this very advanced system. For its time it was way ahead of the rest of the industry. I believe that all of the KSSU DC10's and 747's were equipped with this system??
 
BravoOne
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Re: Introduction of the FMC/CDU?

Sun Aug 13, 2017 4:39 pm

Found this in the Boeing Flight Management Computer Book of Knowledge. All 612 pages of the history of air navigation and unfortunately marked Boeing proprietary. An excellent ref doc for every nav system used in commercial airline services. Lots of pictures and diagrams as well.

Sperry became the prime contractor to implement the Boeing design into the then
mature 757 / 767 airplane development program. The first Boeing / Sperry FMC
(c1982) performed the rudimentary tasks of navigation (including a navigation
data base), flight planning, performance (including an aerodynamic and engine
data base) calculations, and integration with a dedicated moving map, which was
displayed on a Cathode Ray Tube, resulting what would later become known as a
part of the “glass” flight deck, replacing the electro-mechanical instruments of the
past. The birth of the Electronic Attitude Director Indicator (EADI) and
Electronic Horizontal Situation Indicator (EHSI) or moving map was realized and
this configuration became the primary Flight Instrument suite for years to come.
The original Sperry FMC featured a “disk” memory and a navigation database
with a capacity of 100kb.

The FMC was also initially envisioned to provide into the FMC by the pilot. Complete and reliable guidance capability, however, did not materialize in time for the initial deliveries of the 757 and 767.
lateral and vertical autopilot and flight director guidance to the flight plan type
 
Tristarsteve
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Re: Introduction of the FMC/CDU?

Sun Aug 13, 2017 7:42 pm

The Saudia Tristars were delivered in 1978 with a FMC. Not quite up to B767 standards but it flew the aircraft along a inputted route.
 
BravoOne
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Re: Introduction of the FMC/CDU?

Mon Aug 14, 2017 10:05 am

Tristarsteve wrote:
The Saudia Tristars were delivered in 1978 with a FMC. Not quite up to B767 standards but it flew the aircraft along a inputted route.


Yes this was the same system that Delta used on some of their L1011's well. I believe it was a Hamilton Standard product and in Delta's case, it played through the Delco Carousel V platform.

If you Google Hamilton Standard L1100 FMS you can read through the 14 page PDF hat describes this system. Crude by today's standards but years ahead of anything at that time (late 1970's) d dimensional navigation at the time was a first. Lockheed, no surprise there.
 
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7BOEING7
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Re: Introduction of the FMC/CDU?

Mon Aug 14, 2017 10:15 pm

When Boeing started delivering 737-200's with the SP-177 autopilot (about 1981) they also incorporated a PDCS (Performance Data Computer System) which provided some performance data similar to that of an FMC. At the same time they were also attempting to certify a PNCS (Performance Navigation Computer System) for LH. After several years testing with an undelivered LH 737-200 and looking forward to the 737-300 with an FMCS the effort was terminated -- rumor has it LH got a couple of free airplanes in the process.
 
Max Q
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Joined: Wed May 09, 2001 12:40 pm

Re: Introduction of the FMC/CDU?

Tue Aug 15, 2017 6:30 am

We had that same PDCS at Continental on our original 727-200's.

Very useful, it drove the engine EPR bugs to provide target thrust for all phases of flight (thrust levers were manually positioned)
after entering a ZFW it gave a constant reading of aircraft weight and corresponding altitude capability, optimal speeds including
Lrc, Econ and holding and if I remember correctly it provided fuel estimates.


Certainly made the Flight Engineers job easier and since that was me for a few years was much appreciated.
The best contribution to safety is a competent Pilot.

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