but then youd have to spend time controlling the gravity around each individual flying vehicle that you sold. you cant have one universal gravity law for all vehicles since people might want to use them in different circumstances or in combination with other anti-grav vehicles. so youd be forever running around making sure the right laws were applied to each vehicle otherwise youd have alot of angry customers. also for every action there is and equal reaction, so if you had too many anti-grav vehicles they might affect the earths orbit.
so thats not very realistic.





