My G11 Flying Wing Soarer was conceived as a result of experience with a smaller “Wing” which was originally powered by a Mills 0.75 diesel.
In an attempt to improve its soaring capability the wingspan was increased from 1.85m to 3.3m with 20 degrees sweep - back.
Electric power was incorporated from the start since this provided the facility to start/stop the motor at will dependant on the flying conditions.
Aerofoil sections are EH2/10 inboard, modified E186 outboard giving neutral and positive pitching moments respectively.
The centre section spanning 1.65m is built in one piece. Each 0.825m long end panels are then plugged into the centre section using 9.5mm dia birch dowels.
Dihedral of each wing panel is set at 2 degrees. To achieve directional stability winglets are fitted which are sized at 5.5% of the total wing area.
When setting the paper joiner tubes (see photo) - these need to be very accurately located.
The G11 is powered by a 300w 1410Kv Outrunner with a 40amp ESC and 2200maH Li-Po plus a 9”x 5” folding propeller.
With an all up flying weight of 1.4kg and wing area of 0.957 sq m this results in a wing loading of 14.6g/sq dm (4.8oz/sq ft).
C of G was originally fixed at 15% MAC, although after test flights this was moved forward to a point of 13.5% MAC.
Elevon control is set with -80% expo on elevator and +20% expo on aileron with my Futaba FF7 Tx.
G11’s soaring capability has exceeded my expectations, where flight duration in good conditions is only limited by one’s own “stamina”.
The 300w motor has proved to be a little excessive; a 220w unit would be more than appropriate.
David Hitchborn