Primus (oz15354)

About this Plan

Carrera Primus. Radio control powered sailplane, for electric power with geared can motor. Wingspan 2600 mm.

Direct submission to Outerzone.

Note the supplement instructions file (in German) is 39 pages complete, with lots of detailed build photos and drawings.

Quote (google-translated): "Carrera Electric Glider Model Primus. As a basic model, the elegant Primus is a lightweight RC glider that is controlled using rudders and pendulum elevators. Equipped with the electric flight set (order no. 91845), the Primus becomes a high-performance electric flight model with excellent prospects of success in corresponding competitions. With a charge of the drive battery, the model can climb to the limit of visibility. Since the drive can be switched on and off as required using a third servo, it is possible to climb to a medium starting altitude and then repeatedly cross windless areas. Even in weather conditions with no thermals on the plain, the achievable flight time is almost always over 20 minutes.

Before construction begins, the following parts, which are not included in the kit, are required: A completely flat, straight construction board (approx 1.40 m long, 40 cm wide), hard glue, contact glue, sandpaper (coarse medium fine), sanding block, jigsaw, balsa knife and plane, pins, clothespins and rubber rings.

The entire structure of the model was designed so that no additional structures or similar aids need to be created. The wings and tail units are assembled directly on the construction plan, which is protected with an adhesive-repellent film.

The fuselage construction, parts (1) to (44):

The fuselage construction of the Primus glider model is designed so that construction can be carried out quickly and efficiently. The large number of high-quality and precisely manufactured plastic parts shortens the construction time by several times that of a conventional construction kit.

First, all the parts printed or punched on plywood are carefully sawn out. The punched parts are to be cut out of the boards with a sharp knife and deburred. Once all the parts have been prepared according to the parts list (1) to (44), or up to (48 for electric sailboats), the hull construction can begin.

First, a right and a left side wall are built. The side panel reinforcement (1) is to be glued onto the fuselage support (2), flush with the edges. (Only the upper edge of the front part of the fuselage, on the later cabin support, protrudes 2 mm).

Then mark and glue the fuselage straps (3) and (4) using the plastic frames (9) to (13) that will only be needed later. The fuselage straps (3) should protrude approx. 5 mm at the front. Now apply the triangular strips (5), (6) and (7) flat to the inside of the fuselage side panels. Make them exactly flush with the edges of the side panels. The gluing up to this stage of construction was carried out using contact adhesive.

The triangular strips are then cut out of the side panels that are now finished. (6) and (7) are sanded at an angle (see plan litimpfd top view) so that the fuselage is 17 mm wide at the end. (This is the width of the rudder spar (26) to be glued on later).

Now fit the stiffener (8) and also glue it on with contact adhesive (between the strips (6) and (7).

Now the two side parts at the end of the fuselage are wrapped (without glue) with Tesa masking tape or rubber and held together (see photo). Snap the frames (9) to (14) into their designated seats with the addition of glue (use hard glue here, as only this guarantees reliable gluing) and press the two side parts together with rubber rings, or better still with Tesa masking tape. Do not put any glue in the engine mount bearings of the frames (11) and (12). Important: All frames should be placed with the numbered side facing forward in the direction of flight..."

Supplementary file notes

Decals.
Instructions.

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