Very good, got the animal right, but reconsider the speed. 270 miles per hour??? No F*cking way! That's almost a third of the speed of sound. Diving at that speed would rip the bird apart while attempting to slow down, or would just make it create a hole in the earth.
Falcons have been reported to gain velocities of around 130 miles per hour in a dive, still making them the fasted moving animal ever.