Kursant (oz15452)

 

Kursant (oz15452) by Detlef Walter 1975 - plan thumbnail

About this Plan

Kursant. Radio control sport model for CL or RC. Wingspan 1500 mm (extended up to 1700 mm for RC).

Direct submission to Outerzone.

Quote: "Here is a model from the other Germany, the Kursant by Detlef Walter at VEB MoBa (the name of the manufacturer changed several times over the decades of the GDR). It can be built as a CL model or also RC. Due to the high mass of the rx side at that time, it was recommended to add one or two ribs per side to increase the wingspan, so limiting the wing loading. Rudder, elevator, ailerons and landing flaps as well as engine throttle are provided for the RC model; it is not mentioned that the ailerons with a raised dihedral and also the landing flaps could be omitted. A remote control was even more expensive in the GDR than in the FRG, England or the USA, and on top of that difficult to obtain, so this plane was hardly intended for Sunday flyers."

Quote (google-translated): "Construction instructions: Fessel und RC-Modell Kurasant: This model is a shoulder-wing aircraft that can be designed as a tethered or RC model.

The model is designed for the installation of a 5-7.5 cm3 engine. The center of gravity is chosen so that the engine weight plus the tank content is calculated at 350 g. If this weight changes, some lead must be added to frame 1 or the spur. The spur can be partially made of lead by making a lead emergency spur R 54 or R 11.

When installing a radio remote control, it is necessary to tilt the motor pull direction downwards by about 2-3° and also to shift it to the right by about 1-2°.

The changes recorded in the plan must also be observed. Individual changes that arise depending on the system used must also be made by yourself.

For this reason, no mounts for the receiver and batteries were drawn. Only the suggestion for the suspension of the steering machines was put forward. These suspensions are binding. They can be changed at any time. For example, a suspension is planned for frame 5, although three steering machines could easily be attached there because there is enough space for them on the sides. There is enough room for batteries, once under the hull floor between frames RC 4 and RC 5 and between frames R 2 and R 3 on the left side. A steering machine could also possibly be accommodated here. There is space for a receiver and any additional switching devices between frames RC 5 and RC 6 if the rear bench seat is not installed. This space is then 120 x 120 x 100 mm. There would then be a space of 75 x 140 x 120 mm free behind the front bench seat. The steering machines can also be attached to frame 6. In this case, the free space behind the seats would be 240 X 120 X 120 mm.

As mentioned, the installation of the rudder machines and the remote control is up to each individual, as the space available is so large that different systems of various sizes can be used. The rudders are designed so that the elevator can be deflected about 35° up and down, the rudder 30° to the left and right, the aileron 25° up and down and the landing flaps about 25-30° in order to be able to make good changes in direction.

It should be noted that the model sinks very quickly when the landing flap is extended to 30°.

The 80 cm long antenna system ensures good reception.

The wingspan for RC flight can be increased from 1.50 m to 1.60-1.70 m by installing one or two additional ribs between the ribs T3 and T4. These are glued in at a distance of 55 mm each. For RC flight, the RC 25 and RC 26 bend reinforcements must also be glued in, which give the wing a much larger V-shape, which results in better flight stability.

Now for the construction of the model:

We start by building the fuselage to avoid unnecessary warping of the wings and tail unit.

Fuselage: We first make the individual parts as shown in the drawing. These are parts R 1—R 10, R 12, R 14, R 15, R 16—R 20 and R 22 and R 23. It is important to note that part R 3a is glued behind part R 3 in order to achieve a perfect connection between the engine compartment and the cabin. It is also important to note that R 6 is bent at the dashed point in order to achieve the inclined position. This is done when the model is wet over a flame. Once we have plastered the parts, we attach them to a strip slipway that we have to make for this purpose. The plan includes an appendix for a universal strip slipway, the schematic diagram of which was taken from a Polish newspaper.

With this slipway, which requires a little effort but allows the frames to be assembled and disassembled quickly, it is possible, for example, to produce a small series, as is done in some model building groups. It also has the advantage that frames of the smallest size up to about 250 mm hull width can be built, and larger if the booms are enlarged accordingly.

Once we have built the frames on the slipway, we can connect and glue them to the hull straps. The engine mounts R 19 and the control triangle mounts R 22, R 23 can also be glued in..."

Supplementary file notes

Instructions.

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Kursant (oz15452) by Detlef Walter 1975 - model pic

Datafile:
  • (oz15452)
    Kursant
    by Detlef Walter
    from MOBA
    1975 
    59in span
    IC R/C
    clean :)
    all formers complete :)
  • Submitted: 16/07/2024
    Filesize: 457KB
    Format: • PDFbitmap
    Credit*: pikpak
    Downloads: 639

Kursant (oz15452) by Detlef Walter 1975 - pic 003.jpg
003.jpg

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