The fuselage with a box of matches and a scapel to give some scale to Robert's work.

Although the original plan does not show scale framework; once I had decided on markings and covering material - transparent condesor paper - I then added scale spars, ribs and flying wires.

The balsa structure, mostly from 0,8 x 0,8 mm balsa sticks. The leather welt (cockpit coaming) is a balsa ringlet glued to the longerons.

Almost finished, but without the final details.

... and finished. The estimated lead ballast of 1,1 grams in the spinner was too much and had to be changed. The propeller and spinner now weight about 0,7 gram and overall model weight without rubber is 3,8 grams, with the centre of gravity at 1/3 of the upper wing. The estimated motor is one loop of 1,1 x 1,3 mm Tan SS (2005).

The structure is built using cyano glue and the condenser paper is attached by very thin white glue - be careful, only one direction of the tissue grain will produce satisfactory results. Once covered thick nitrocellulose dope is used for final assembly, the tail surfaces can be adjusted using thinner and dope. The instrument panel is a vector graphic (needed for good resolution of such a small picture).

Ready to fly! Author of the plan, well known modeller Antonin Alfery, had used a polystyrene fuselage on his nice airbrushed Albatros pistachio (about 6g without rubber!) and he reached more than 50s of flight duration. We will see...

The model is set up with 4mm dihedral on the upper wings and 8mm on the lower wings, with 4mm washout on the right wing tip. (I think there may not be enough dihedral though.) The 105mm propeller has 8 degrees down and 4 degree right thrust. Finally the elevator has 1 degree of up and the rudder is set to the left (this is a common style of indoor flying in the Czech Republic).

This picture shows some of the construction methods and materials Robert used in the project. A larger version of this very instructive image can be found here.

Pictures of this model and more can be found at Roberts site.