Go FPV Drone Racing at 117 mph for $436 with the Furious Build, an FPV drone designed by youtube drone reviewer and enthusiast UAVfutures, which boasts a thrust-to-weight ratio over 14. All parts for FPV flight can be purchased for $436 from Banggood, or $493 if you opt for Amazon for some parts (see table below). Footage of 117 mph flight and a build guide follow the parts table.
Total Price = $436-$493 Total Weight = 444g Thrust/Weight = 14.4 (6224g/432g)
Speed Test and Build Guide by UAVfutures (Part 1)
Speed Test and Build Guide by UAVfutures (Part 2)