By being a "good" inventor you have to design, plan, test, and make your invention perfect. Some scientists ultimately fail, but Orville and Wilbur Wright definitely didn't- they invented the first motor aircraft that we still use almost 100 years later! They were obviously good scientists! When the Wright brothers were building and testing their new airplane, they had people helping them throughout the process. At a time when the Wright brother's propeller shafts, the part of the airplane responsible for making the propellers spin, got damaged by the vibration of the motor, they sent the parts to their trusted machine. In the same way, when the Wright brothers were ready to test their aircraft, they got volunteers from the Kill Devil Hills
