rtfm
Well-Known Member
Hi,
Does anyone know if there is source which lists the amount of CL increase with incremental deployment of Fowler flaps? Why I'm asking is because while I can find a number of sources which quote max CL for various flap designs, and it is general knowledge that the final deflection of Fowlers mostly just adds drag rather than lift, I can't find anywhere which mentions where the transition point is between adding lift, and adding significant drag. I have a feeling it is around the 15 to 20 degrees deflection point, after which drag begins to increase significantly.
In the absence of any test (or theoretical) data, I'd be happy to set up a 1-metre wing section to act as a test bed, but haven't figured out quite how to set this up. Ideas welcome.
I am thinking of deploying Fowlers on the Razorback only up to the point where drag begins to increase significantly. This would be the takeoff setting, as well as the landing config. At this point, I'll then deploy a speed brake to provide the fine-grained drag as required.
Any ideas?
Regards,
Duncan
Does anyone know if there is source which lists the amount of CL increase with incremental deployment of Fowler flaps? Why I'm asking is because while I can find a number of sources which quote max CL for various flap designs, and it is general knowledge that the final deflection of Fowlers mostly just adds drag rather than lift, I can't find anywhere which mentions where the transition point is between adding lift, and adding significant drag. I have a feeling it is around the 15 to 20 degrees deflection point, after which drag begins to increase significantly.
In the absence of any test (or theoretical) data, I'd be happy to set up a 1-metre wing section to act as a test bed, but haven't figured out quite how to set this up. Ideas welcome.
I am thinking of deploying Fowlers on the Razorback only up to the point where drag begins to increase significantly. This would be the takeoff setting, as well as the landing config. At this point, I'll then deploy a speed brake to provide the fine-grained drag as required.
Any ideas?
Regards,
Duncan
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