Instruct: Classify Amazon reviews into positive or negative sentiment
Query: LOCKHEED ELECTRA

GREAT BOOK. I REMEMBER THE CRASHES AS A CHILD AND ALWAYS WANTED TO KNOW THE STORY. I FINALLY FOUND OUT WHAT HAPPENED IN THIS BOOK. ONE DETRACTION. THE ASSIGNED PROBLEM WAS ASCRIBED TO SOMETHING CALLED "WHIRL MODE". THIS IS NOT EXPLAINED. THE PROBLEM WAS BASICALLY CAUSED BY GYROSCOPIC PRECESSION OF THE HUGE PROPELLERS. IN THE POUNDING IN TURBULENCE, THE SIDE BRACING EVENTUALLY FAILED AND CAUSED THE PROP, GEARCASE, AND ENGINE TO ROTATE SIDEWAYS INTO THE WING. THE PROP CUT THE WING STRUCTURE AND OTHER THINGS.