zoomie36 Posted December 8, 2011 Posted December 8, 2011 When I start up, I power of the sais and then align it with the horizon. It works normally when I launch, but after about 10 minutes it slowly topples, and I can't realign it. Am I making an improper switch, perhaps the DC/AC inverter in the wrong mode?
sobek Posted December 8, 2011 Posted December 8, 2011 When I start up, I power of the sais and then align it with the horizon. It works normally when I launch, but after about 10 minutes it slowly topples, and I can't realign it. Am I making an improper switch, perhaps the DC/AC inverter in the wrong mode? Do you mean the SAI? It is not meant to be uncaged all of the time. The SAI uses only one gyroscope, AFAIK and therefore accumulates error very quickly. It is only meant to be used in emergency situations (to get the bird down safely), when the regular attitude indicator has failed. During normal flight, the SAI should be caged (but turned on). Good, fast, cheap. Choose any two. Come let's eat grandpa! Use punctuation, save lives!
Luigi Gorgonzola Posted December 8, 2011 Posted December 8, 2011 sobek, the Flight Manual claims the opposite. Hence the Stby. SAI handling I guess. zoomie36, you should be able to "reset"/recenter it by pulling the knob (as if you'd cage it, just omit the turn on the knob). It might take a while (some seconds), but the indicator will return to its centered position.
sobek Posted December 9, 2011 Posted December 9, 2011 sobek, the Flight Manual claims the opposite. Hence the Stby. SAI handling I guess. Well, i don't have RL knowledge but to me it makes no sense to have it uncaged during normal flight. Whatever floats your boat, i guess. Good, fast, cheap. Choose any two. Come let's eat grandpa! Use punctuation, save lives!
effte Posted December 9, 2011 Posted December 9, 2011 Well, i don't have RL knowledge but to me it makes no sense to have it uncaged during normal flight. Whatever floats your boat, i guess. A secondary AI should be uncaged at all times, possibly excluding aerobatics. If the primary goes tango uniform while you are in the soup, what good would a caged SAI do you? You'd have no way to erect it. There's no real drift in an attitude gyro, as they're typically built self-erecting. Fly circles for a while and you may end up with a slight bank on the gyro when returning to S&L. This has been discussed previously somewhere in this forum. ----- Introduction to UTM/MGRS - Trying to get your head around what trim is, how it works and how to use it? - DCS helos vs the real world.
sobek Posted December 9, 2011 Posted December 9, 2011 There's no real drift in an attitude gyro, as they're typically built self-erecting. Fly circles for a while and you may end up with a slight bank on the gyro when returning to S&L. But then the drift in the sim is modelled unrealistically. :( Good, fast, cheap. Choose any two. Come let's eat grandpa! Use punctuation, save lives!
effte Posted December 9, 2011 Posted December 9, 2011 (edited) sobek, the SAI was bugged and toppled after a while. I thought this was fixed a couple of versions ago though... Edit: - SAI excessive precession was fixed. Edited December 9, 2011 by effte 1 ----- Introduction to UTM/MGRS - Trying to get your head around what trim is, how it works and how to use it? - DCS helos vs the real world.
sobek Posted December 9, 2011 Posted December 9, 2011 sobek, the SAI was bugged and toppled after a while. I thought this was fixed a couple of versions ago though... Ah i see, thanks, i guess i never noticed because i got used to not uncaging it. Edit: As to OT, a track would be helpful to tell what you may be doing wrong. Good, fast, cheap. Choose any two. Come let's eat grandpa! Use punctuation, save lives!
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