I tried many ways to
combine a flying wing and a asymetrical design in a theoritical way. Let me explain this design. The weight of the fuselage compensates
the moment creates by the engine and prop (turning the airplane around the horizontal axis
(from front to rear)) . The prop is no longer placed in the center. It would push the
plane into a right turn around the vertical axis.
What forces do we have left to compensate? The drag of the fuselage, the thrust of the
prop and maybe the force that is pushing the tail (excists in a airplane using a tail, see
drawings in section weird aviationdesigns). I don't know if the last named force is still
excisting in a tailless design.
Lets look at the way these forces work. The drag pushes the fuselage backwards and creates
a left turning moment. The thrust of the prop pushes the fuselage forwards and creates a
right turning moment. The size of the forces depend on many factors. If you have
calculated the forces of your design you could let these forces compensate each other by
placing the prop under a angle (turning the prop towards the center of gravity). You have
to calcualte the right angle according to the forces.
I know that these forces change according to the speed. So
choose the speed you like best compensated. I would suggest the take-off or landingspeed.
As I said, there are no such designs flying yet. So if you
are a beginner and if you are thinking about testing it out, be sure to ask help from more
experienced designers or to build your models in cheap materials. It could happen you will
have to rebuild the model a lot. Foam covered with balsa seems a easy way to me. Have fun
with the experiments.
If you could send me some picture of your model, I surely
will place it on this page. Please, a JPG-file and maximum width of 550 points. |