>>213960
>>though it does sound a bit dangerous.
It's actually the opposite. For example, suppose I'm an engineer and you hired me to build you an elevator. You want the elevator to lift 10 people at once. Well, I could look up the average weight of a person and then design the elevator to lift 10 times that. But, that could get me into trouble: what if someone doesn't read the warning sign and they cram 12 people in the elevator instead? What if half the people are overweight or are carrying luggage? Because I want to avoid those problems I will design the elevator to carry more weight than the specified 10 people in order to leave a factor of safety in case someone overloads the elevator. So, 10 people would be 100% capacity, but in reality the elevator would be designed to handle a lot more than that just in case.
THAT is where "more than 100% output" comes in--any time when an engineer deliberately exceeds design specifications to leave a margin of safety, for increased durability, or to make extra-sure that they can meet the performance standards required. Space shuttle engines are the same. Can you imagine what kind of a SNAFU there would be if the engines weren't quite powerful enough to lift the shuttle? Needless to say the engineers made the engines stronger than needed just in case...