randomTOTEN Posted December 3, 2020 Posted December 3, 2020 (edited) It's interesting how the FLCS apparently works in the F-16. I would assume trim is handled internally by FLCS. It can be adjusted by either the hat or the 3 trim wheels on the AP/TRIM panel. There are 3 trim position needles to indicate trim status to the pilot, and these are electrically driven by FLCS in response to commands. But statements like Dee-Jay's and this bug report lead me to believe this isn't the case. Is it the case that the FLCS receives trim commands only from the needle position on the side panel? That those aren't merely indications of trim status.. they are the actual trim status? That the stick doesn't give commands to FLCS, it gives commands to AP/TRIM panel, and the motors which drive the trim wheels and trim indicators? That would explain a lot. The motors start at 0 RPM and when a trim hat input is applied they have a "spin-up" to full trimming speed. That would explain Dee-Jay's description of trimming. The three curves show the acceleration profile of the trim panel motors. ....I mean.. it makes sense, FLCS is an early FBW design. Edited December 3, 2020 by randomTOTEN
Nikolas_A Posted December 4, 2020 Posted December 4, 2020 Correct. On Viperpit there are pictures of the Manual Trim panel internals. There are motorized potentiometers driven by the hat switch (or manually). 12 hours ago, randomTOTEN said: Is it the case that the FLCS receives trim commands only from the needle position on the side panel? That those aren't merely indications of trim status.. they are the actual trim status?
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