Miles per hour be used to express the speed of delivery of a ball in sporting events such as cricket, tennis and baseball. Miles per hour Miles per hour (abbreviated mph, MPH or mi/h) is an imperial and United States customary unit of speed expressing the number of statute miles covered in one hour. It is used in the United States, United Kingdom and many Commonwealth nations, particularly in the Caribbean region. Speed limits and road traffic speeds are given in miles per hour in the following jurisdictions (elsewhere kilometers per hour are used): Road traffic speeds in other countries are indicated in
Drone Racing League 16 pounds of thrust with a top speed of around 90 MPH. Unlike the Racer2, the Racer3 has a hard shell or canopy to protect it from crashes. DRL brought a fleet of identical 600 Racer3 drones to every race in 2018. In July 2017, Ryan Gury and his team of drone engineers designed and hand built the DRL RacerX, setting the Guinness World Record for the Fastest Ground Speed by a Battery-powered Remote-controlled Quadcopter. Weighing less than two pounds, the RacerX hit a top speed of 179.6 miles per hour, the official record-breaking speed was recorded as 163.5 miles