GumNaam
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yes it can...recall that weight is inversely proportional to velocity while mass is constant. so with speed, the "weight" of the aircraft will reduce. HAVING said that though, since it is still under the influence of gravity, it will still have a limit to what the weight would get minimized down to based on the velocity. so your point may STILL be valid in that when the aircraft is going it at its max speed with full thrusters firing, the reduced weight may STILL be more than the full thrust output. I don't remember the equation of physics that calculates the weight based on the speed.Look dude empty weight of F-15 =28,000 lbs
payloads of EX =30,000 lbs
max fuel of EX = 13,445 lbs
lets add these numbers = 28,000 +30,000 +13445 = 71,445 lbs
and it have 2 29,000 lbs engines = 58,000 lbs
so can it be fly with weight exceeding the thrust, please do explain me???