Welcome to the ** Kline-Fogleman (KFm) Airfoils – Advanced Theory/Science ** discussion thread. The purpose of this thread is to try and. The simplicity and performance of the KF airfoil have made it popular in the Maker Trainer 2 and uses the KFm-2 (Kline-Fogelman model 2) airfoil design (a. The idea works but only with active automated re-configuration of the shape of the step(s) during flight. Further testing has shown that this airfoil.

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Both wings exhibit good airvoil, and lift stays good at lower airspeeds. Off to the field… Not only did I get to test fly this model within 24 hours of finishing the build but I even remembered to take my stand-in GoPro weight.

When a television station went off the air at night, people saw snow on their ifm screens. It repeated the show again in The UC wing uses 2 lengths of strapping tape on the bottom to help strength, the KFm-3 wing has no tape, or other reinforcements.

I would be curious enough to donate to a Kickstarter or Indiegogo campaign. The red spiral indicates the captured vortex of air that the step creates.


You might find yourself using the design on all of your future builds. And, it was bouncing all around the universe in the microwave background and showing up on TV sets.

KFm wings a basic explanation

They concluded that the trapped vortex formed by a cavity or step could not be held in place without such active control. I was just as surprised as everyone else at how well it flew! You need to log-in to rate articles. Email Required, but never shown. For this build, given the nature of the construction, I decided to try something different. I was that of an art director working in advertising. Log-In Get access to additional features and goodies.

A crew from Good Morning America came along to film the event. The roll rate increased and the plane required less power to fly level than it did with the armin wing. A Useless Geek asked: The longest flight by Kline with his paper airplane traveled feet, four inches. Fortunately, the step is relatively small in the big scheme of things and the aircraft can still perform normally.

New Technology: Kline-Fogleman Airfoil Design |

A great example of krm technique used is found on the versa wing. Using the same power set up from the original build and the same floor design but different air foil I am convinved that there is some magic behind flying a KFm airfoil.


The enormous end plates act as vertical stabilizers as well as a guides forcing the air to maintain direction from the leading edge off the trailing edge. NASA had it right, It is better that a zirfoil plate but not by much. The concept behind the Kline-Fogleman airfoil may be hard to understand because it is so different from present aerodynamics. Just watched the video.

The further back the center of gravity is the more desirable it is because of the center of balance. Thank you guys very much. And where much of that is found now is too. Further testing has shown that this airfoil is aiffoil in low Reynolds number flow. I also used an extra layer top and bottom of the center section to make sure there would be enough space in the middle to cut a bay for all the electronics.

The resulting stepped wing can have improved performance and flying characteristics compared to the even simpler ‘flat plate’ wing used in some radio-controlled models. Originally Posted by Freddie B. This brings up a question I have been pondering for awhile.