Junkers J10 (oz14355)


Junkers J10 (oz14355) by Bruno Schmalzgruber 1969 - plan thumbnail

About this Plan

Junkers J10/CLI. Radio control scale model. Wingspan 1400 mm, for 5 to 10 cc engines.

Quote (google-translaeted from the German): "The J10/CLI can be used as a stepping stone to the true-to-original models in terms of construction effort and construction difficulties. It still has the shape and structure of the conventional boxes, but differs somewhat from them. The model is reproduced exactly to scale and can therefore be used in future competitions. Some model pilots who are not interested in competitions but do not want to build the twentieth or twenty-first model of the same type in their club will certainly flirt with such a model.

The model type can almost be described as ideal, because it is a low-wing aircraft, which is preferred by many model pilots. The wing has almost no V-shape, which benefits inverted flight. The landing gear is attached to the fuselage, making it easy to transport, and the RC system and tank are accessible from above. So the model no longer has to be turned on its head if you want to get to the guts.

The structure: As already mentioned at the beginning, the structure of the model is kept very simple. You can get by with a flat building board. The construction time is extremely short for a prototypical model. After the draft was fixed, I started with the J 10 on Sunday afternoon, and the following Sunday evening the model was completely painted and ready for the installation of the RC system. In between, I had to go about my daily earning a living from 7:00 a.m. to 5:00 p.m. The total construction time, including painting, was around 50 hours. Not everyone will build such a model in this time, but it will certainly not take longer than with a conventional model.

The hull is a rectangular box, arched on the upper rear part. This bulge is not difficult to make; a few battens that are cut conically are glued to the half-frames, and the most difficult part of the construction is over. The upper front part of the fuselage is designed as a cover and is attached to the fuselage by means of dowels that reach through frame 3 and a quick-release fastener that connects to frame 5.

The lid on the fuselage gets an ideal locking position through the observer's position. The openings of the pilot and observer stand were covered with 2 mm plexiglass on the sample model. This prevents moisture from penetrating the fuselage interior without blocking the view of the system. It is possible to completely expand the observer's seat. There is plenty of space for the RC system. The 300cc tank fits snugly in the front fuselage and should be sufficient for all engine sizes. The good accessibility of the RC system will be perceived as pleasant by most model pilots. The two machine guns with magazines and three dummy cylinders are still attached to the cover.

The engine compartment is intended for a 10cc engine, which is installed upright and yet hardly protrudes from the fairing. With a 30 cm propeller, the original size is almost reached.

The empennage is constructed very simply from 8 mm balsa boards. You just have to try not to use a warped board. In the original, the vertical tail is moved as a whole area. On the model, this area was divided at the cross bar, because it is hardly noticeable there. When using a prop system, it is easily possible to adopt the original design on the model. However, this has the disadvantage that the control arrangement can be damaged if the model rolls over.

The size of the fin is completely sufficient. The elevator has the dimensions of the usual RC models, only the control surface is slightly larger. You just have to make sure that the rudder deflection is not too big. The effect of the elevator remains just as good..."

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Junkers J10 (oz14355) by Bruno Schmalzgruber 1969 - model pic

  • (oz14355)
    Junkers J10
    by Bruno Schmalzgruber
    from Modell
    February 1969 
    55in span
    Scale IC R/C LowWing Military Bomber
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 22/01/2023
    Filesize: 397KB
    Format: • PDFbitmap
    Credit*: Rennfahrer
    Downloads: 572

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Junkers J10 (oz14355) by Bruno Schmalzgruber 1969 - pic 003.jpg
Junkers J10 (oz14355) by Bruno Schmalzgruber 1969 - pic 004.jpg
Junkers J10 (oz14355) by Bruno Schmalzgruber 1969 - pic 005.jpg

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