lwalter Posted February 13, 2022 Share Posted February 13, 2022 This is the context in which I try to activate the altitude hold autopilot: AP channels on: ALL 4 Radio altimeter, Doppler, Vertical gyros 1 & 2 on, Comp system (GREBEN) on vertical speed = 0 or very close to 0 Altimeter and radar altimeter both working properly (I'm at about 300 m radar altitude) When pushing the autopilot altitude hold button, the button moves but doesn't turn on green. How am I missing something? Is it a known issue? iMac Retina 5K, 27-inch, i7 4 GHz, 32 GB RAM, AMD R9 M395X 4 GB | Thrustmaster HOTAS Warthog | Cougar MFD | MFG Crosswind | EDTracker Pro | Realteus ForceFeel DCS World | Bf109 | Fw190 A8/D9 | P47 | P51 | Spitfire | I16 | C101 | L39 | F86F | MiG15 | MiG19 | MiG21 | FC3 | A10C | AJS37 | AV8BNA | F5 | F14 | F16 | F/A18 | M2000 | JF17 | Christen Eagle | Yak52 | SA342 | UH1H | Mi8 | Ka50 | Combined Arms | NS430 | Persian Gulf | Normandy | Channel | Syria | NTTR | WWII Assets Link to comment Share on other sites More sharing options...
admiki Posted February 13, 2022 Share Posted February 13, 2022 Right most one on AP panel is an altitude hold 1 Link to comment Share on other sites More sharing options...
AeriaGloria Posted February 13, 2022 Share Posted February 13, 2022 There is a square button labeled “ALT”, this on the top panel with route and hover modes becuase it interfaces with doppler and radar altimeter system. It is a radar altimeter hold that only functions during hover along with hover hold As Admiki said, the right most circular button on the bottom row is a barometric altitude hold, that will work at all times. It will be disengaged by any throttle movement 1 Black Shark Den Squadron Member: We are open to new recruits, click here to check us out or apply to join! https://blacksharkden.com Link to comment Share on other sites More sharing options...
lwalter Posted February 13, 2022 Author Share Posted February 13, 2022 Thanks! I understood the difference between the baro and the radar hold buttons, but I didn't know that for radar hold, you had to be in a hover. How is it actually used? I'm asking because if you're already in a hover, aren't you already keeping your radar alt stable? iMac Retina 5K, 27-inch, i7 4 GHz, 32 GB RAM, AMD R9 M395X 4 GB | Thrustmaster HOTAS Warthog | Cougar MFD | MFG Crosswind | EDTracker Pro | Realteus ForceFeel DCS World | Bf109 | Fw190 A8/D9 | P47 | P51 | Spitfire | I16 | C101 | L39 | F86F | MiG15 | MiG19 | MiG21 | FC3 | A10C | AJS37 | AV8BNA | F5 | F14 | F16 | F/A18 | M2000 | JF17 | Christen Eagle | Yak52 | SA342 | UH1H | Mi8 | Ka50 | Combined Arms | NS430 | Persian Gulf | Normandy | Channel | Syria | NTTR | WWII Assets Link to comment Share on other sites More sharing options...
AeriaGloria Posted February 13, 2022 Share Posted February 13, 2022 2 hours ago, lwalter said: Thanks! I understood the difference between the baro and the radar hold buttons, but I didn't know that for radar hold, you had to be in a hover. How is it actually used? I'm asking because if you're already in a hover, aren't you already keeping your radar alt stable? Not necessarily hover, it’s tied to when doppler system goes from showing ground speed on drift gauge above 50 kmh to when the hover movement gauge starts working under 50 kmh. So like hover hold, it can only be activated at less then 50 kmh ground speed, and I believe also will turn off outside doppler bank/pitch limits but I’m not 100% on that I do find it cool to try to trim it to hands off hold exact position with hover and altimeter hold. I’m sure that it was a welcome feature when having to loiter for a while. Hovering attack was taught to German units as way to defend an area Black Shark Den Squadron Member: We are open to new recruits, click here to check us out or apply to join! https://blacksharkden.com Link to comment Share on other sites More sharing options...
Quati Posted February 14, 2022 Share Posted February 14, 2022 16 hours ago, lwalter said: Thanks! I understood the difference between the baro and the radar hold buttons, but I didn't know that for radar hold, you had to be in a hover. How is it actually used? I'm asking because if you're already in a hover, aren't you already keeping your radar alt stable? Most DCS missions you almost get the same thing fine tuning the trim and collective to be in a steady hover or using the HOVER and ALT(radar) AP. In real life you can have more gusts of winds and turbulence near the ground making the wind push you to the left/right/front/back and even up or down. In that case those AP modes could assist when the pilot is checking the maps, mission plans, tanking selfies or texting. Link to comment Share on other sites More sharing options...
AeriaGloria Posted February 14, 2022 Share Posted February 14, 2022 13 minutes ago, Quati said: Most DCS missions you almost get the same thing fine tuning the trim and collective to be in a steady hover or using the HOVER and ALT(radar) AP. In real life you can have more gusts of winds and turbulence near the ground making the wind push you to the left/right/front/back and even up or down. In that case those AP modes could assist when the pilot is checking the maps, mission plans, tanking selfies or texting. Too bad there is no cup holder, the air con vents throwing ice would be perfect for keeping your drink cool Black Shark Den Squadron Member: We are open to new recruits, click here to check us out or apply to join! https://blacksharkden.com Link to comment Share on other sites More sharing options...
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