R/C Flying Wing (...or Tailless Aircraft)

This is my self designed RC Flying Wing.
It is based on the Ultralight Mitchell Wing,
but with some significant changes.
Wing Span: 275 cm
Wing Area: 112 dm2
Weight: 4000 g
Battery: 6S - 3000mAh
Prop: 18 x 12.5
Motor: Don`t remember - had it laying on the shelf...
The wing is hand launched, hence the front mounted propeller (...no finger cutting please...).
Very good handling characteristics and stability.
The winglets provides good directional stability.
Elevons provides pitch and roll control.
Tip rudders controls yaw.
The wing can be flown up to 25 min at one battery charge,
so I guess it is quite effective.
The airfoil is MH-81.

[@mikewhite4628]

That is a very nice wing indeed. How does the MH 81 perform in thermals? Judging by the smoothness of the elevon operation you used really good servos and lots of exponential``??? Any chance of some ground to air shots? Very nice.

[@bjofuruh]

The MH 81 is a very forgiving airfoil that performs as expected for this wing, To get top notch performance, you could use a thinner airfoil (8-10%), but it may be more critical to reproduce so you could end up with performance less than expected. For a light wing loading and a rather big wing, it is very good in thermals.
A video shot from ground (first flight):
ruclips.net/video/Kv8b7UJpI3Y/видео.html

[@mikewhite4628]

Thanks for that response and, after looking at the ground to air vid it does look very nice.......

[@ronakagarwal16]

What documents and data did you use to design and calculate all the required data such as span, taper, elevons size etc??

[@bjofuruh]

I used a program called Nurflugel: www.zanonia.de/ranis.php
And I tested the design in the flight simulator: X-Plane 9 (you can make your own designs in this simulator).
Most significant is the location of the centre of gravity, choice of airfoil section and wing washout.