Why have a turn and bank?

Pivotal Altitude. . . or illusive altitude!

Do you remember those 2 minute turns around a point? More bank down wind. Less bank upwind of the point... there was a name for that???

remember those 2-minute turns AROUND A POINT? ball and needle

I assume you want to slip to lose altitude, just slow it down. Or to lose it really fast, with throttle at idle, hold the yoke all the way back against the stop, you will go down at about 900 fpm, when you have lost enough, release back pressure and add throttle. I suggest you practice this at altitude first.

At 60 degrees of bank, unless you add lots of power, you will need to hold significant back pressure on yoke to maintain altitude. And depending on engine, you may not have the extra power to maintain altitude. Furthermore, I believe 60 degrees of bank is considered an aerobatic maneuver. Personally I wouldn't be doing that in my 75 year old ERcoupe!

Which instruments are vacuum?