XP-67 Moonbat – The Experimental Fighter that Kept Catching on Fire !USA WW2 Leave a Comment on XP-67 Moonbat – The Experimental Fighter that Kept Catching on Fire The little-known XP-67 Bat warplane prototype was the McDonnell Aircraft Company’s first attempt to enter the aviation industry before the United States joined World War II. (Visited 3 times, 1 visits today)