i think you are trying to say waist.
The answer should be, the racket and the shuttercock should be serve below the waist.
In no particular order: 1) Positioning of body, bird, racquet - your body should be relaxed and stable. 2) To transfer their weight from back to front using power generated from whole body ending with a wrist flick. (and a follow through across the body for underhand serve) 3) To make contact with the shuttle below your waist with the racquet head below the wrist. 4) To have the proper grip for their serve. (Forehand grip/Backhand grip). Grip should be relaxed. For maximum control, hold the top part of the grip. 5) To not lift their back foot from the ground. 6) Bonus tip - take your time and a deep breath - most bad serves are because the server has rushed himself and not focused on the task.
The website below will tell you where the Space Shuttle is and has been in real time.
According to the "Badminton Blog" website (refer to the link, below), the fastest badminton smash was recorded at 206 mph on June 3, 2005, while tennis' fastest serve (comparable to a smash) was clocked at 155 mph set in 2004, according to the Wikipedia website (refer to the link, below). Therefore, badminton may be considered faster than tennis.
The Space Shuttle looks much like a passenger airplane, but it is more like a glider. Visit related links below for picture of the Space Shuttle
The Presidential Commission Report on the Space Shuttle Challenger Accident (Rogers Report) can be found via the below link.
See the related link below.