When an airplane is about to takeoff from the runway it is usually configured with all the necessary components that augment lift in order to enable takeoff. As the airplane starts rolling on the runway after the throttles have been opened, it is met with a lot of forces exerting different pressures that oppose its takeoff path.
As the speed increases the amount of wind opposing it increases and this drags down the airplane. The amount of opposing forces of an airplane in flight cannot be equated to the forces opposing a taxiing airplane because they are more. The pilot have to be on the lookout for the takeoff distance available, power required and power available, which can be computed before a takeoff is carried out. This phase of flight is very critical and once initiated and the runway length available does not allow for an aborted takeoff, we are now committed into taking off and not even an engine fire can stop the pilot at that point in time. The pilot should keep the engine throttles open or the airplane will stall and crash. The more they increase in speed the more the pressure exerted on the airplane.
But this is only for a short time because as soon as the aircraft passes through medium altitudes to high altitudes the pilot can now throttle down because the resistance has started to wane and no more high power is required from the engines. The aircraft is even moving at high airspeeds and covering more distance with less fuel.
What is that project that you attempted and you felt a heavy load on your shoulders? It is normal to meet stiff opposition when kick starting any major project in life. You keep the momentum at full force just like the pilot keeps the throttles open. When you conquer those challenges at the beginning then as you progress the challenges and pressures begin to thin out. Those who persevere to the end usually have sweatless victories and they achieve much with less energy and effort. You are the pilot of your own airplane so keep your throttles open to avoid stalling and crashing.God bless.
By: Wilani William Bashaki