Dave Calkins
Registered User
Anchorage, Alaska
Wickerbills have been discussed many times on the site, but no data or photos, so here we go. I made some that hang down about 3/4" long and installed them, took some photos and did some flying. I've been using them for about 3 flight hours and thought they were a great mod. I tested with them on the trailing edges about to where the aileron trailing edge starts to curve, then removed the ones on the ailerons, then removed the ones where the flaps would be on a flapped Cub.
The airplane is a Wag-Aero Cuby, about a thousand pounds empty on 31's with AOSS, Baby Bushwheel, and Landes 32 gallon belly tank. Round tip wings, Cuby airfoil (not SuperCub airfoil. The Cuby's is similar, but with a larger leading edge radius), no flaps. I have sealed the elevator hinge gaps, which works well for increased low-speed elevator response. Large VG's located similar to MicroVG's locations on the wings, none on the tail (Gap Seal does that job nicely). 140 Horsepower, 80 inch prop. Engine/Prop combo work very well on this a/c. The a/c is well-behaved and a joy to fly. You SuperCub owners would not be dissapointed with the performance of this "Cub".
Test data as follow:
55 degrees F. Barometric Pressure 29.90
The first number is with full TE wickerbills, Second number is minus aileron wickerbills, third number is with NO wickerbills. I believe there are anomolies.
Takeoff speed indicated (ASI) 20 22 25
Takeoff speed GPS 30 29 32
Landing speed ASI 40 40 40
Power off stall ASI 39 34 40
Power off stall GPS 35 38 NA
Power On stall (Nose very high, full power) ASI 30 20 35
Power On stall GPS 34 38 NA
Temperature increased to 57 for the last test. Air was somewhat bouyant (thermal activity?) on the test with the aileron wickerbills removed. Wind was light and variable for all three tests. I believe the ASI numbers to be more relavent relative to one another than the GPS numbers due to the varying winds. All testing was completed within a 1 hour timeframe.
Landings were all at 40MPH indicated, with both wickerbill test approaches somewhat steeper than the non-wickerbill flight, and good flare authority with the wickerbills. Without wickerbills, 40 MPH was a stretch to see over the nose, with the nose high and need for a bit of power to arrest the descent and flare.
Wickerbills took about 5 MPH off the top speed of this Cuby that will do 93MPH at 2450RPM without them.
The tail shakes more on steep full power climbs WITH the wickerbills.
DAVE
The airplane is a Wag-Aero Cuby, about a thousand pounds empty on 31's with AOSS, Baby Bushwheel, and Landes 32 gallon belly tank. Round tip wings, Cuby airfoil (not SuperCub airfoil. The Cuby's is similar, but with a larger leading edge radius), no flaps. I have sealed the elevator hinge gaps, which works well for increased low-speed elevator response. Large VG's located similar to MicroVG's locations on the wings, none on the tail (Gap Seal does that job nicely). 140 Horsepower, 80 inch prop. Engine/Prop combo work very well on this a/c. The a/c is well-behaved and a joy to fly. You SuperCub owners would not be dissapointed with the performance of this "Cub".
Test data as follow:
55 degrees F. Barometric Pressure 29.90
The first number is with full TE wickerbills, Second number is minus aileron wickerbills, third number is with NO wickerbills. I believe there are anomolies.
Takeoff speed indicated (ASI) 20 22 25
Takeoff speed GPS 30 29 32
Landing speed ASI 40 40 40
Power off stall ASI 39 34 40
Power off stall GPS 35 38 NA
Power On stall (Nose very high, full power) ASI 30 20 35
Power On stall GPS 34 38 NA
Temperature increased to 57 for the last test. Air was somewhat bouyant (thermal activity?) on the test with the aileron wickerbills removed. Wind was light and variable for all three tests. I believe the ASI numbers to be more relavent relative to one another than the GPS numbers due to the varying winds. All testing was completed within a 1 hour timeframe.
Landings were all at 40MPH indicated, with both wickerbill test approaches somewhat steeper than the non-wickerbill flight, and good flare authority with the wickerbills. Without wickerbills, 40 MPH was a stretch to see over the nose, with the nose high and need for a bit of power to arrest the descent and flare.
Wickerbills took about 5 MPH off the top speed of this Cuby that will do 93MPH at 2450RPM without them.
The tail shakes more on steep full power climbs WITH the wickerbills.
DAVE