The Model 247 had just enough room for the flight attendant to walk in the aisle and also step over the two wing spars that ran through the middle of the cabin. An airplane can carry only so much, and the weight of the stewardess and her equipment (lunches, thermos jugs of coffee, blankets, pillows, magazines, fly swatter, etc.) was figured in as a constant part of the weight of the airplane - 135lbs was allowed for the stewardess and 121.5 lbs for her equipment. Knowing this allowed the airline to determine how much weight it could carry between the ten passengers and mail. There was no need to weigh the pilots. The 247 cockpit was so tiny that the pilot had to be average height at best and slim - otherwise he would not be able to get into his seat.