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... camber, slats, flaps, blowing of the surfaces

Unfortunately, they are some of the best ways of increasing Coefficient of Lift, far better than trying multiple wings, as seen with the Fiesler Fi 156 Storch.

Deep camber, undercamber, increasing chord (and, proportionally, thickness) are helpful in particular, as are endplates. Another wing or two can be added. Weight should be reduced as much as possible with safe structural strength requirements in mind.

But now you have a very draggy, slow aircraft with limited range, unless you can retract these devices and speed up a little.

Lift is proportional to V$^2$

If you have even more power, and the option to go supersonic, a short single wing like this or a lifting body with no wing at all like this one would suffice.

It really depends on your fuel budget and available thrust. Cost conscious subsonic airliners use retractable lifting devices, and even slower speeds are required only because of airspeed limits, runway length, and the quality of the landing gear (especially tires).

... camber, slats, flaps, blowing of the surfaces

Unfortunately, they are some of the best ways of increasing Coefficient of Lift, far better than trying multiple wings, as seen with the Fiesler Fi 156 Storch.

Deep camber, undercamber, increasing chord (and, proportionally, thickness) are helpful in particular, as are endplates. Another wing or two can be added. Weight should be reduced as much as possible with safe structural strength requirements in mind.

But now you have a very draggy, slow aircraft with limited range, unless you can retract these devices and speed up a little.

Lift is proportional to V$^2$

If you have even more power, and the option to go supersonic, a short single wing like this or a lifting body with no wing at all like this one would suffice.

It really depends on your fuel budget and available thrust. Cost conscious subsonic airliners use retractable lifting devices, and even slower speeds are required only because of airspeed limits, runway length, and the quality of the landing gear (especially tires).

... camber, slats, flaps, blowing of the surfaces

Unfortunately, they are some of the best ways of increasing Coefficient of Lift, far better than trying multiple wings, as seen with the Fiesler Fi 156 Storch.

Deep camber and undercamber are helpful in particular, as are endplates. Another wing or two can be added. Weight should be reduced as much as possible with safe structural strength requirements in mind.

But now you have a very draggy, slow aircraft with limited range, unless you can retract these devices and speed up a little.

Lift is proportional to V$^2$

If you have even more power, and the option to go supersonic, a short single wing like this or a lifting body with no wing at all like this one would suffice.

It really depends on your fuel budget and available thrust. Cost conscious subsonic airliners use retractable lifting devices, and even slower speeds are required only because of airspeed limits, runway length, and the quality of the landing gear (especially tires).

... camber, slats, flaps, blowing of the surfaces

Unfortunately, they are some of the best ways of increasing Coefficient of Lift, far better than trying multiple wings, as seen with the Fiesler Fi 156 Storch.

Deep camber, undercamber, increasing chord (and, proportionally, thickness) are helpful in particular, as are endplates. Another wing or two can be added. Weight should be reduced as much as possible with safe structural strength requirements in mind.

But now you have a very draggy, slow aircraft with limited range, unless you can retract these devices and speed up a little.

Lift is proportional to V$^2$

If you have even more power, and the option to go supersonic, a short single wing like this or a lifting body with no wing at all like this one would suffice.

It really depends on your fuel budget and available thrust. Cost conscious subsonic airliners use retractable lifting devices, and even slower speeds are required only because of airspeed limits, runway length, and the quality of the landing gear (especially tires).

... camber, slats, flaps, blowing of the surfaces

Unfortunately, they are some of the best ways of increasing Coefficient of Lift, far better than trying multiple wings, as seen with the Fiesler Fi 156 Storch.

Deep camber and undercamber are helpful in particular, as are endplates. Another wing or two can be added. Weight should be reduced as much as possible with safe structural strength requirements in mind.

But now you have a very draggy, slow aircraft with limited range, unless you can retract these devices and speed up a little.

Lift is proportional to V$^2$

If you have even more power, and the option to go supersonic, a short single wing like this or a lifting body with no wing at all like this one would suffice.

It really depends on your fuel budget and available thrust. Cost conscious subsonic airliners use retractable lifting devices, and slower speeds are required only because of airspeed limits, runway length, and the quality of the landing gear (especially tires).

... camber, slats, flaps, blowing of the surfaces

Unfortunately, they are some of the best ways of increasing Coefficient of Lift, far better than trying multiple wings, as seen with the Fiesler Fi 156 Storch.

Deep camber and undercamber are helpful in particular, as are endplates. Another wing or two can be added. Weight should be reduced as much as possible with safe structural strength requirements in mind.

But now you have a very draggy, slow aircraft with limited range, unless you can retract these devices and speed up a little.

Lift is proportional to V$^2$

If you have even more power, and the option to go supersonic, a short single wing like this or a lifting body with no wing at all like this one would suffice.

It really depends on your fuel budget and available thrust. Cost conscious subsonic airliners use retractable lifting devices, and even slower speeds are required only because of airspeed limits, runway length, and the quality of the landing gear (especially tires).