reply to post by turbofan
You're right....but, whilst typing, keeping it "simple", and considering the FDAU/SSFDR as a single unit, for ease of thought?? Apparently, you
have issues with that, and want to nitpick.
SO, shoot me for NOT being 100% picky, picky technical at EVERY moment!!
NO IT DOES NOT! THe SSFDR does NOT directly record these inputs!
You just contradicted your response in the previous paragraph. The FDAU
receives the inputs. The displays in the cockpit receive the data in real time.
The FDAU sends words of info to the flight data recorder as updates (polled information) depending on the word status and polling
See? You said yourself, I am aware of the FDAU's role...if I omit it, it is not intended as decpetion...just convenience, maybe lazy writing....
Thing is....it is I
with the actual, real-world experience IN A SIM...the real SIMs. Over two decades' worth of experience, in many
different machines, from many different manufacturers, representing differing levels of advancement in design, depending on YEAR of manufacture, and
airplane that it represents.
Compared to an "armchair googler" who is trying to equate what he reads online, with his knowledge of UNRELATED computer technology, and systems.
Someone could stand to do more actual research:
Therefore, that SAME info you get for flap position on the EICAS in the SIM
is the SAME information sent to the SSFDR for recording.
ONLY, in your example above, IF you are talking about the hard insturments, and their position information...the ones mounted in the inustrument
AS I SAID (if only people would thoroughly read my words) in the cited example: On the actual airplane, there are sensors
, many of them, that
directly report to the FDAU the positional information of the ACTUAL flap/slat segments. THOSE sensors, and their readings, ARE what control the
Flap/Slat Position indicators (and the associated green/amber lights, and the EICAS messages, in the case of B-757/767, and others).
IN THE SIM? The sensors are in the Flap Handle postion information...its movement and postion send signals to the computer, which in turn send the
appropriate and expected SIMULATED readings on the instrrments and lights and EICAS in the SIM's cockpit. There are NO SIGNALS to report the
physical movement of the control surfaces, nor the hydraulic vlaves that have been actuated, nor the various microswitches that record their proper
postioning and trigger the lights, in proper sequence, etc, etc.
It is VERY complex...it is designed INTO the real airplane. Again, it is a SIMULATION for the benefit of the pilots in the SIM, to recreate the same
sorts of visual indications they'd expect to see once they get into the real airplane!!!
Hang on....I found a schematic for a B-737 pneumatic system...let me put it into My Pictures, and post it....(as an example...hard to find everything
we're talking about, online at short notice)...
....Ah, (bad word!). The one I found is a .bmp/.gif, and ATS Media doesn't like it. Here is the link:
See that? Just ONE system (although few systems are completely independent, as many interact with each other). There are a plethora of "discrete"
readings and data that are recorded, from all around that system, to the SSFDR (through the FDAU! of course...).
In a Boeing 737 SIM, there is NO actual...oh, Duct Temp sensor....there is a program that sends a signal to a gauge, but the derivation of that signal
is DIFFERENT, as it's computer-generated, than is the actual signal from an actual Temp sensor....
If it shows up in the SIM cockpit displays, it's also sent to the SSFDR digitally!
No, SIMs don't have an SSFDR.
[edit on 24 August 2010 by weedwhacker]