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**Memorex** hi all, i was thinking today about flying and jetpacks what not you get the idea long story short i need math help, lol

i weight 375lbs at most

so before i can even get off the ground i need 375lbs of thrust, but from there i need to be able to climb 50 feet into the air to avoid buildings etc can someone help me out i have no idea where to start on this one

do i work it out lb's per square inch or what, how do i calculate the amount of force needed to climb each foot anyone able to help me on this? also i need to be able to fly for about 2 hours max