And this is why virtual horizons are so important. I never thought about that graveyard spiral before. It's really scary to imagine.,(reply>), Benjamin - Basically:<br><br>Altitude constant, ASI constant, turn needle central, slip ball central - level flight.<br>Altitude increasing, ASI decreasing, turn needle central, slip ball central - climb.<br>Altitude decreasing, ASI increasing, turn needle central, slip ball central - dive.<br>Altitude constant, ASI constant, turn needle positive, slip ball central - level turn.<br>Altitude decreasing, ASI increasing, turn needle positive, slip ball central - spiral (AVOID).<br>Altitude decreasing, ASI unstable, turn needle central or unstable, slip ball hard over - spin (AVOID).,(reply>), Could you give a quick explanation of how one would determine attitude from altitude, airspeed, and turn coordination?,(reply>), If you play KSP, you know the feeling.,(reply>), It depends on the type of artificial horizon. There are several glider instruments on the market that have a built in electronic artificial horizon which is available at the press of a button. They use electronic based accelerometers and G sensors instead of vacuum so they are always in the "spun up" state. An example of such an instrument is the LXNav S80 variometer which includes a basic AHRS. Where I fly cloud flying in gliders is prohibited but it's a handy feature that may save one's life one day. Most of the modern glider navigation units include AHRS displays too.,(reply>), +Chris Emerson You can figure out your attitude based on Altitude, Airspeed, and turn coordinator (assuming it's DC electic) if you have a vaccum failure (Which would lead to an attitude indicator and heading indicator failure). In Canada at least, you have to demonstrate your ability to do so when you get your commercial license.