Hornet (oz15491)

About this Plan

Aeropiccola Hornet. Control line sport biplane model. Wingspan 600 mm.

Planfile includes build instructions.

Quote (google-translated): "HORNET was designed specifically for those who, having an engine with a displacement of no more than 1.5 cc, wanted to create a control-line model that combined excellent performance with an aesthetic comparable to a real aircraft.

The choice fell on the biplane type for a very simple reason: the wing surface. In fact, in the creation of a monoplane for small-displacement engines, the surface usually turns out to be insufficient, considering that it is not possible to reach a considerable wingspan. In the case of the biplane, however, it is possible to achieve a surface sufficient to achieve a low wing load.

With respect to the HORNET model, the concept fit perfectly and the result was a model that was maneuverable like few others, thanks precisely to the low wing load achieved.

However, the builder must aim for the maximum lightness of the model (weight not exceeding 380 grams overall, considering the installation of a 1.5 cc SUPER-TIGRE G. 31 diesel engine).

Having made the necessary premises, we will only have to add the usual recommendations before considering the construction of the model.

Particular care will be taken in the execution; the pre-assembly box will be used, which will allow greater certainty of success and - above all - will allow considerable savings to be achieved; maximum attention will be paid to the various assembly and finishing operations, keeping in mind that every gram gained will affect the final result.

CONSTRUCTION:

WINGS: - If the model is made - as is advisable - with the pre-assembly box (easily available from any good model-making retailer) we will have the two wings machine-roughed out in their plano-convex profile. In this case, it will be necessary to proceed only with the finishing using sandpaper. For this operation, we recommend the installation of a block of soft wood (poplar) - on which to glue a sheet of fine sandpaper - which we will use as a smoothing tool (fig. 2) until the correct wing profile is achieved, which can be checked by means of the dianes (or templates) indicated with Si and S2 in fig. 3.

Once the perfect profile has been achieved, we will spread using a brush a layer of CEMENT on the wing surface, in order to strengthen the balsa and eliminate the hair from the wood itself.

In fact, the CEMENT, being a cellulose product, will block every pore of the balsa and will harden the surface, making it shinier.

After spreading the CEMENT, we will go over it with sandpaper for a more accurate finish. If the wing surface is not smooth enough, we will repeat the operation.

As you can see, the creation of the wings is quite simple.

FUSELAGE: As the first assembly operation of the fuselage, we will prepare the frames 1 (n. 1 piece) and 2 (n. 2 pieces). As you can see, the structure of the HORNET is of the type commonly called box, easy to make and of minimum weight.

We will then proceed to cutting and finishing said frames that we will obtain from plywood with a thickness of 2 mm.

The sides of the fuselage are 6, considering the hexagonal section of the same. We will obtain the sides from soft balsa with a thickness of 2 mm, sides that are already cut in the pre-assembly box. Therefore, in the case of putting it into operation, it will be sufficient to temporarily assemble said sides in order to check that they match and that the union results in the shape..."

Direct submission to Outerzone.

Quote: "Bipe for 1,5cc, an article was published on Sistema Pratico 1958, a magazine like Popular Mechanics. Pit"

Supplementary file notes

Article.

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