I will try to explain an upright pirouetting loop.Establish a moderate forward speed,add in rudder somewhere around 360 to 540 degrees a second,this is the speed I am comfortable with and think it looks more graceful.As the nose is pointed in the direction of flight pull back on the elevator(remember the heli is spinning) then when the tail is pointing in the direction of flight push forward on the elevator stick.The previous is repeated somewhere around 6 to 8 times.When you get perpendicular climbing you have to start unloading the rotor disc by working back to 0 degrees on collective,so that by the time the heli is at the top of the loop you should be around 0 to -3 degrees.Now when you are on the downward leg of the loop start slowly adding collective back in so by the time you are parallel with the ground you are back at your starting point of 5 to 8 degrees..I hope I am of some help to someone Thanks Jason Kalbfleisch