oriol
Well-Known Member
Hi!
In another thread it was mentioned, tangentially, a potential Cl value which seemed a bit optimistic. Given that I am not an expert to tell, what is too much and what can be too small. I was curious about the possible Cl max values that can be found in a sport airplane, with or without high lift devices?
On the net I found a paper with Cl max values for infinite wings and another one with CL max values of commercial airplanes.
In the case of infinite wings the Maximum value is of 4 with an experimental boundary layer suction system. Then you have a wing, with a combination of double slotted flap with a leading edge slat, that can go as high 3,2.
In the graph with commercial airplanes the highest value is that 2,8 for the de Havilland Dash 8.
To get a bit of perspective, I checked what was the Cl max of a superstol sport aircraft. I picked the Slepcev Storch, with the values given in the specs, considering a MTOW of 450kgs, a min speed of 41kmh, you have a CL of 3,13. Given that value I do not know if the minimum speed claimed on the Slepcev is a abit exagerated to make it more commercially attractive?
Perhaps the airplane can perform astonishing take off distance in YT with the help of a little headwind and minimum weight?
Using the specs of the single seat Eipper quicksilver I have a CL of 1.
The difference between the Eipper quicksilver with 1 and that of the Storch of 3, seems a bit too much.
What is your opinion, is the Cl value of the Storch realistic?
What can be a reasonal value of maximum CL for a wing without high lift devices (like the Eipper or much higher) and another used with those like in a light sport STOL aircraft?
Thanks for your comments,
Oriol
In another thread it was mentioned, tangentially, a potential Cl value which seemed a bit optimistic. Given that I am not an expert to tell, what is too much and what can be too small. I was curious about the possible Cl max values that can be found in a sport airplane, with or without high lift devices?
On the net I found a paper with Cl max values for infinite wings and another one with CL max values of commercial airplanes.
In the case of infinite wings the Maximum value is of 4 with an experimental boundary layer suction system. Then you have a wing, with a combination of double slotted flap with a leading edge slat, that can go as high 3,2.
In the graph with commercial airplanes the highest value is that 2,8 for the de Havilland Dash 8.
To get a bit of perspective, I checked what was the Cl max of a superstol sport aircraft. I picked the Slepcev Storch, with the values given in the specs, considering a MTOW of 450kgs, a min speed of 41kmh, you have a CL of 3,13. Given that value I do not know if the minimum speed claimed on the Slepcev is a abit exagerated to make it more commercially attractive?
Perhaps the airplane can perform astonishing take off distance in YT with the help of a little headwind and minimum weight?
Using the specs of the single seat Eipper quicksilver I have a CL of 1.
The difference between the Eipper quicksilver with 1 and that of the Storch of 3, seems a bit too much.
What is your opinion, is the Cl value of the Storch realistic?
What can be a reasonal value of maximum CL for a wing without high lift devices (like the Eipper or much higher) and another used with those like in a light sport STOL aircraft?
Thanks for your comments,
Oriol
