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IFMU
June 12, 2025, 21:25:00 GMT permalink Post: 11899752 |
There are no IDGs on a 787. There are 4 identical variable frequency starter-generators.
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): Engine Failure (All) Generators/Alternators RAT (All) RAT (Deployment) |
IFMU
June 13, 2025, 16:52:00 GMT permalink Post: 11900688 |
Jump to 1:48 in this video (if the link doesn't automatically put you there):
https://youtu.be/SbDJjgN7Xbo?si=ShNJ2oA39j46iw9M&t=108
You can't hear that RAT sound at the very beginning of the flypast? Subjects (links are to this post in the relevant subject page so that this post can be seen in context): RAT (All) |
IFMU
June 14, 2025, 01:03:00 GMT permalink Post: 11901050 |
That's because the RAT is ultimately either deployed because it's "forced" out by an active signal, OR it's deployed because the electromagnetic system is de-energized and the spring loaded mount flaps it out. That's what happens when nothing is stopping the spring from doing spring action things, like you'd see when there's no power going to whatever usually holds it shut.
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): RAT (All) RAT (Deployment) |
IFMU
June 17, 2025, 14:56:00 GMT permalink Post: 11904373 |
Subjects (links are to this post in the relevant subject page so that this post can be seen in context): Generators/Alternators Hydraulic Failure (All) RAT (All) RAT (Electrical) |
IFMU
June 21, 2025, 13:04:00 GMT permalink Post: 11907729 |
Another post referenced the RAT only supplying electrical power after 10s - I find that hard to believe, not instant obviously because there has to be some stabilisation time and startup/boot time but it would imply the LH flight instruments would only be active very late. Hopefully the RAT hydraulics would be effective quicker than that. Subjects (links are to this post in the relevant subject page so that this post can be seen in context): RAT (All) |
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