De Havilland DH2 (oz14983)

About this Plan

De Havilland DH2. Radio control scale model WWI biplane fighter. Wingspan 1440 mm, for 45 FSR engine.

Quote (google-translated from the Spanish): "The model that we present this month is based on the well-known English fighter plane that participated in World War I, fighting in France and other places with the German Fokkers. Its original design is due to the lack of knowledge that the allies had at that time about the firing synchronization mechanism through the propeller. It was in operation until 1917 and several series were built with slight variants.

When we thought about building the biplane, we only had the three views that the small 'Revell' assembly plan has, and the wingspan and length measurements of the DH2. Having little information, we discarded the idea of building an exact model and contented ourselves with designing an airplane which, while maintaining a scale in the known measurements, would have an appearance as similar as possible to the small plastic model.

In its realization, we dispensed with all special and complicated materials to obtain (only the wheels are out of the ordinary). The entire model is built with balsa wood, pine, plywood, piano wire, etc - materials available to everyone, so it can be built by any aeromodeller with a little skill and a lot of patience. The result, of course, is worth it.

In solving the numerous problems that we encountered in order to successfully complete the work undertaken, the idea that seemed simplest to us prevailed, as long as it turned out to be fun. Our objective was to obtain an original biplane, but one that flew as well as possible, with a minimum of inconvenience.

Hassle-free transportation: The first problem was how to disassemble it for transport, without requiring hours to put it back together at the field. The solution adopted was to divide it into two blocks; one formed by the fuselage, engine, landing gear and wings assembly with its intricate 'forest' of mounts and cables; and the other, formed by the empennages attached to the complicated V-shaped structure, composed of the stringers, uprights and braces that form the original tail of the model.

In order to quickly and easily separate the model into these two pieces, it was necessary to avoid operating moving surfaces using the complicated set of levers, pulleys and cables that the real airplane has. In the model, the controls and reception installation have been resolved as follows:

Gas control: Servo housed in the front right area of the cabin and control sent through normal nylon tubes.

Steering control: Servo in a prone position in the right lower wing housing, with its action lever protruding from its upper surface, facing the right lower spar of the tail structure. The control tube that operates the rudder runs through the lower part of this spar. This control is linked to the servo by means of a kwik-link that must be disconnected, along with the depth control, when separating the model into two parts.

Depth control: Servo in a prone position in the lower left wing housing that, analogously to the steering control, activates the elevator joint through the lower left side member of the tail.

Aileron control: At the ends of the lower wing and in each of the housings provided for it, which, by means of a short rod, directly operates the aileron on the corresponding side. These ailerons on the lower wing, by means of vertical rods, in turn operate those on the upper wing. It goes without saying that these two servos are linked by Y cables that plug into the same channel on the receiver.

The receiver, protected with foam rubber, is installed in the cockpit as if it were the pilot's backrest; it is attached to the frame using crossed Boma bands; The switch, also in the cockpit, is attached to its left wall within reach of the pilot. Finally, the receiving battery pack, well protected, is placed at the same time..."

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