There are many reasons why drones have greater lift on a lower-than-normal propeller. This is all the more reason why you must understand this. The main point of a drone propeller is that it should be able to turn faster when there is less air resistance, and with less air resistance, it is easier for the propeller to generate more lift.
All you need to do is look at the difference between the propeller of an airliner and a drone. The second propeller in the former can turn faster than the first propeller of a drone, because of the extra drag created by the air mass. This extra drag, then, can allow the plane to fly faster, even though it has a lower-than-normal propeller.
The reason for this additional drag is that air is denser in air masses below the airplane's nose. This is why in a typical propeller, the propeller is trying to keep the engine from spinning too fast, so that the speed is constantly maintained.
The problem with this is that if you are flying over a high-density air mass, such as the clouds, the propeller becomes unsteady. So, how can the propeller work against itself, creating this extra drag?
By having a constant angle of attack, which is a problem of a propeller. By having a constant angle of attack, the propeller is trying to do the same thing each time it turns. It will try to create more thrust, but that can only be done if the angle of attack is constant.
Instead, the propeller is trying to rotate faster, but that means it can only spin one complete rotation every two minutes. This is not good enough, so it tries to turn slower, which also means that it has to take longer to turn.
On a drone propeller, this is done with something called a damper. This is a disk, which is the same shape as a propeller blade, that you see on airplanes, and the disk works in exactly the same way as the damper on a propeller, by creating extra drag, causing the propeller to take longer to turn.
This extra drag is what is slowing down the propeller's maximum tilt. Once the disk is spinning faster, it starts to create enough lift to keep the drone from falling out of the sky.
The key to creating a larger lift on a drone propeller is the addition of the disk. This disk creates this extra drag, so that the drone propeller doesn't have to spin faster to create more lift.
The reason why there is less lift on a drone propeller, compared to an airliner, is simply because the propeller blades are wider, and the propeller has more drag. So the part of the propeller that creates the most lift, the area just above the center of the propeller, is wider.
With the extra area, it will take longer for the drone propeller to turn, making it harder for the propeller to create enough lift. This is why a bigger drone propeller will work better than a smaller one.
The reason why a drone propeller will work better than an airliner is simply because it will create more lift, and with more lift, it will keep the plane flying long enough to do it's job. The drone is able to fly longer and farther, because it does not need to create extra drag in order to stay aloft.