How do you get the darn thing to hit mach 3.2? I can get it to mach 3, but the mach hold gets stuck at mach 3.0.I read the flight notes and it said I needed to first set the KEAS to 352 then switch to mach and it would automatically put it to mach 3.2, but whenever I set the KEAS to 352, the mach speed lowers to sub sonic speeds! Flipping the switch doesn't work the way it's described that it should.EDIT: I mean, I know I can push the engines to max and go way above mach 3.2, but the flight notes say it should be able to work with autopilot, yet I cannot get it to work even after reading it ten times.

How do you get the darn thing to hit mach 3.2? I can get it to mach 3, but the mach hold gets stuck at mach 3.0.I read the flight notes and it said I needed to first set the KEAS to 352 then switch to mach and it would automatically put it to mach 3.2, but whenever I set the KEAS to 352, the mach speed lowers to sub sonic speeds! Flipping the switch doesn't work the way it's described that it should.EDIT: I mean, I know I can push the engines to max and go way above mach 3.2, but the flight notes say it should be able to work with autopilot, yet I cannot get it to work even after reading it ten times.

Anybody?

What altitude are you at? As I recall you need to be above FL750 at least, but I havent flown it in over a year.

What altitude are you at? As I recall you need to be above FL750 at least, but I havent flown it in over a year.

80 to 85k feet.

Are we talking about the AlphaSim SR-71? If so, there's a trick you have to do by flipping the MACH/KEAS switch in the autopilot. You kind of describe it in your post. The reason is that FSX has problems depicting aircraft speeds beyond Mach 3. FSX can do it, but for whatever reason, an autopilot will go up to Mach 3 and no farther. If you bump the speed past Mach 3 by measuring KEAS, then the autopilot will accept faster speeds. That's why you flip between Mach and KEAS and back again. The AlphaSim forum describes this in detail, or at least it did when I was writing the SR-71 Review. They even have a procedure for getting to Mach 3.2 in 12 minutes from take-off, which is rediculously fast. I could never do that. Basically, it's a step climb with a shallow power dive to break the sound barrier. Right now, I have a few other things to get done, but if I come across my notes or find out more, I will post that. In the meantime, I suggest that you check out AlphaSim's forum if you have not already. Also check out http://www.sr-71.org/blackbird/manual/for how the real-world Habu pilots did it! Fascinating reading.Jeff ShylukSenior Staff ReviewerAVSIM

Are we talking about the AlphaSim SR-71? If so, there's a trick you have to do by flipping the MACH/KEAS switch in the autopilot. You kind of describe it in your post. The reason is that FSX has problems depicting aircraft speeds beyond Mach 3. FSX can do it, but for whatever reason, an autopilot will go up to Mach 3 and no farther. If you bump the speed past Mach 3 by measuring KEAS, then the autopilot will accept faster speeds. That's why you flip between Mach and KEAS and back again. The AlphaSim forum describes this in detail, or at least it did when I was writing the SR-71 Review. They even have a procedure for getting to Mach 3.2 in 12 minutes from take-off, which is rediculously fast. I could never do that. Basically, it's a step climb with a shallow power dive to break the sound barrier. Right now, I have a few other things to get done, but if I come across my notes or find out more, I will post that. In the meantime, I suggest that you check out AlphaSim's forum if you have not already. Also check out http://www.sr-71.org/blackbird/manual/for how the real-world Habu pilots did it! Fascinating reading.Jeff ShylukSenior Staff ReviewerAVSIM

Yeah I tried that little trick on setting the KEAS switch then back to Mach, but it didn't work and only slowed my jet down. So far, the only way I can get it to above mach 3.0 (without over speeding) is to set the throttle to about 88% manually at 80,000 feet. Not the best solution, but it's better than nothing.