Flying honey bees demonstrate highly variable metabolic rates, here in Wisconsin. Altitude, wind speeds, temperature, and weight of foraged material will be a major piece that have to be factored in. Also take into account if these are 2 day old bees or over wintered bees with busted up flappers. Not so great at the math but the thrust to weight ratio... ahh They get back to the hive when they are good and ready any questions tell it to the business end of that bee.