Jim55
Well-Known Member
Why are the wings of seaplanes set at such a large incidence?
The Catalina, for example has a 6.7 degrees incidence on the main wing with no wash out. On the rear wing (horizontal stab) the incidence is 3.7 degrees.
Compared with a land plane: The incidence of a KR2 is 1.75 degrees at the root with a wash out at the tip to -.04 degrees. The horizontal stab is set at 0 degrees. What we see with the KR is the same with all land planes that I built or were involved with. (eg. Christavia Mk 1, Cessna or Banty)
Is the seaplane’s high incidence set in order to lift it off the water faster? But that does not account for the horizontal stab’s 3.7 degrees. With this incidence, the airplane is going to fly tail-high, causing extra drag.
Jim
The Catalina, for example has a 6.7 degrees incidence on the main wing with no wash out. On the rear wing (horizontal stab) the incidence is 3.7 degrees.
Compared with a land plane: The incidence of a KR2 is 1.75 degrees at the root with a wash out at the tip to -.04 degrees. The horizontal stab is set at 0 degrees. What we see with the KR is the same with all land planes that I built or were involved with. (eg. Christavia Mk 1, Cessna or Banty)
Is the seaplane’s high incidence set in order to lift it off the water faster? But that does not account for the horizontal stab’s 3.7 degrees. With this incidence, the airplane is going to fly tail-high, causing extra drag.
Jim
