Taming the Wild Baby Blender with Dihedral: Ver. 2
Following my earlier post ("Baby Blender Wings with Dihedral," # 44, dated 14 June 2013), I experimented again with dihedral wings. I always liked the look of the Baby Blender but also found her to be a handful in the air with the original Flitetest wings.
This version 2 of the dihedral wings includes the undercambered wing tips used by Flitetest in the FT Spitfire and other, later, Swappable Series planes.
PDF plans are linked below. Top and bottom wing shapes are the same. Cut-outs are black boxes. Where cut-outs differ between the 2 wings, I have included text notes so indicating. Only the bottom wing needs to have ailerons cut.
View attachment BB_Mk_II_wings_w_dihedral.pdf
The wing is also slightly larger, with dimensions of:
Wing span: 29.5 inches (749.3 mm)
Wing chord: 7.75 inches (196.9 mm)
Wing area: 288.6 in2 (14.7553 dm2)
Wing loading: 16.8 oz/ft2 @ an AUW of 26.6 oz (51 g/dm2 @ 754g)
Center of gravity (CG) remained the same as that marked on the original Flitetest Baby Blender V.2 plans. Attaching the bottom wing to the fuselage did not change from the original Flitetest plans, and you use the same interplane struts from the original plans to connect the top wing to the bottom wing.
Flight characteristics were much more stable with the dihedral, larger wing area and lower wing loading, helping tame what I found to be a squirrelly Baby Blender while still allowing it to be a very aerobatic airplane.
I would be interested in hearing from others who give this wing a try about your experiences and observations.