Rattle in EICAS

Sunake

Found it. It is at 5:30

ProfCrash

Those sound like relays clicking

Sunake

It does sound like relays, but I have a feeling it's something to do with the messages populating on the screen, maybe some kind of characteristic of these displays. Anyway in my Sim the clicking or rattle is out of sync with the messages populating. Unlike in that video

Clorix

That sounds like an old hard drive to me.

ploodovic

@Clorix said in Rattle in EICAS:

That sounds like an old hard drive to me.

Same here. Reading from disk-sounds.

Sunake

I'm not convinced it's a hard drive sound. If these planes do have spinning disk drives, then that would most likely be up front in the avionics bay in the nose. You definitely wouldn't be able to hear it in the cockpit.

But hopefully Nick can confirm. Maybe there real is a drive inside the display rattling away. Although I don't know why it would be doing that to display eicas messages. It's not like they would be stored on there.

Black Square

The sound comes from the equipment in the IAPS Card Cage at the bottom of the double-door cabinet behind the copilot's seat. It has nothing to do with the EICAS messages, but just had convenient timing, apparently. There is a surprising amount of equipment in that cabinet. So much so that it has its own cooling air source from the cockpit blower.

Sunake

I stand corrected!

Captain Bakon

What is IAPS?

Black Square

@Captain-Bakon Integrated Avionics Processing System.

SinkRate

Ah, IAPS. Which, if you were curious is still a component (and abbreviation) used in all the modern Collins stuff right up to Proline 21 Advanced.