I hope this makes sense…
My colleagues and I were discussing the speed of a grain of wheat (or rye) being discharged from an airplane flying 150 miles per hour. There is actually quite a lot of research on the terminal velocity of grain. Wheat is approximately 7.5 to 8.12 meters per second which is about 17 miles per hour.
Everyone could agree the grain would drop at 7.5 m/s, but we couldn’t come to an agreement on how fast the grain would decelerate along the horizontal axis. Then there was talk of horizontal terminal velocity…which is beyond me, but I think it is the same.
Here is a real world scenario (with estimated numbers): An airplane may fly 150 mph and drop seeds over a standing crop 30 feet above the ground. A helicopter may only be able to do it at 100 or 120 mph.
Will the seed from the airplane have more horizontal penetrating power into the standing crop? Can you calculate the horizontal air drag on the grain and chart how quickly it decelerates? It would be interesting to know if the grain is traveling 85 mph when it is applied at 30 ft and how it would change if the aviator was higher or lower.