The Space Shuttle did have engines. It had to turn backwards and fire them to reduce speed and fall out of orbit. These engines were nothing compared to the two solid rocket boosters with 1 million pounds of propellant or the Main Booster with over a half million gallons of liquid propellant.
“The Space Shuttle did have engines.”
Of course, you are correct. Please let me rephrase:
The space shuttle did not have air-breathing engines that could operate in the atmosphere. ;-)
The space shuttle actually did not have a main booster. The thing in the middle was just a big tank that fueled the 3 engines on the orbiter during take off. According to Wikipedia, each of the three orbiter engines had 393,800 pounds of thrust at lift off and each solid rocket booster had 2,800,000.