Junkers Ju 52 (oz14402)


Junkers Ju 52 (oz14402) by Bruno Schmalzgruber 1968 - plan thumbnail

About this Plan

Junkers Ju 52. Radio control scale model. Wingspan 2200 mm.

Quote: "Good old aunt 'Ju'. Semi-scale model, by B Schmalzgruber.

The Junkers Ju 52 was a byword for reliability all over the world. It was not for nothing that more than 40 airlines put this aircraft into their scheduled service, where it achieved legendary fame for its reliability, robustness and flying good nature.

The Ju 52/3 m as a model: One should not only build a model exactly according to a prototype, but it should also fly accordingly. It therefore made sense to design the model as a motor glider. With a wingspan of 2.2 m and a flying weight of approx. 3.3 kg, a low wing loading is achieved, which has a favorable effect on the flying speed.

The most striking feature of the Ju 52, which is missing from the model, is the corrugated iron planking. Attempts were made with corrugated cardboard. This was sprayed three times with hard primer and twice with synthetic resin paint. After the paint had dried, there were still dull spots. So more paint would have to be applied to the cardboard to get an even surface. The whole model would have to be covered with such corrugated cardboard, and that would add another 1 kg to the weight. Furthermore, the corrugation of the cardboard is probably a little harder due to the paint, but it is unavoidable that after a short time clearly visible fingerprints can be seen. For this reason, corrugated planking was not used on the model.

The structure of the model: this is kept very simple. The hull is of box construction with a cambered back. The canopy is removable and held firmly on the fuselage with a rubber ring. The 200 ccm tank is located under the hood. It is possible to check the fuel level through the cabin window. After removing the hood, the tank can be easily removed from the model. The engine is installed on the side and almost disappears from the overall view of the model. The NACA ring can be removed, making the engine very accessible. The carburetor is located right under the ring, so you can no longer inject without creating an opening in this ring. There is plenty of space for the RC system.

The tail unit does not cause any difficulties during construction, you just have to remember that the elevator does not tolerate as much deflection as the conventional tail units of the RC models. The rudder, on the other hand, can have a deflection of approx 15 to 20° without being too hard. The surface is designed as an undivided design, as this construction is simpler than with a divided surface. It's fully planked, making it a bit heavier but extremely stiff, which is important for the aerobatics that some will no doubt do with it.

The aileron mounting looks like a lot of work, but it isn't. This arrangement should be left as it is, because that is what is very obvious with the Junkers machines. The landing flaps are not necessary for slow flight. But if you value it, you can make it flexible.

The model has so far only been launched on grass runways. The first starts were only carried out with one engine. At the 3rd start, the small COX were also put into operation. These engines were chosen because they have excellent starting and running characteristics when the air cleaner is free of dirt. With the 40 ccm tanks, the two engines continue to run even when the central engine has been idle for a long time. First, the two external motors are started and regulated. You can hear it very clearly if these are not properly adjusted. Since the middle motor emits a completely different sound, this can also be adjusted by ear. Although the propellers of the side motors protrude only a little over the engine cowling, you can still see an increase in performance during take-off and during flight.

If a side motor fails, don't worry, the Ju isn't that easily upset. The model is never rotated over the surface. So it is not necessary to be on the lookout like a lynx during the flight when a side motor might cut out in order to take immediate countermeasures. We got sick of it, so we tried aerobatic maneuvers, which were all satisfactory. It is easily possible to fly a roll with three engines..."

Direct submission to Outerzone.

Supplementary file notes



Did we get something wrong with these details about this plan (especially the datafile)? That happens sometimes. You can help us fix it.
Add a correction

Junkers Ju 52 (oz14402) by Bruno Schmalzgruber 1968 - model pic

  • (oz14402)
    Junkers Ju 52
    by Bruno Schmalzgruber
    from Modell
    86in span
    Scale IC R/C Multi Military
    clean :)
    all formers complete :)
    got article :)
  • Submitted: 07/02/2023
    Filesize: 1180KB
    Format: • PDFbitmap
    Credit*: Rennfahrer
    Downloads: 1046

  • Junkers_Ju_52 | help
    see Wikipedia | search Outerzone
    Test link:
    search RCLibrary 3views (opens in new window)

    ScaleType: This (oz14402) is a scale plan. Where possible we link scale plans to Wikipedia, using a text string called ScaleType.

    If we got this right, you now have a couple of direct links (above) to 1. see the Wikipedia page, and 2. search Oz for more plans of this type. If we didn't, then see below.

    ScaleType is formed from the last part of the Wikipedia page address, which here is https://en.wikipedia.org/wiki/Junkers_Ju_52
    Wikipedia page addresses may well change over time.
    For more obscure types, there currently will be no Wiki page found. We tag these cases as ScaleType = NotFound. These will change over time.
    Corrections? Use the correction form to tell us the new/better ScaleType link we should be using. Thanks.

Junkers Ju 52 (oz14402) by Bruno Schmalzgruber 1968 - pic 003.jpg
Junkers Ju 52 (oz14402) by Bruno Schmalzgruber 1968 - pic 004.jpg
Junkers Ju 52 (oz14402) by Bruno Schmalzgruber 1968 - pic 005.jpg
Junkers Ju 52 (oz14402) by Bruno Schmalzgruber 1968 - pic 006.jpg

Do you have a photo you'd like to submit for this page? Then email admin@outerzone.co.uk

User comments

This plans are from 1968!
Pascal Rodesch - 25/02/2023
Got it. Have added the year now, many thanks :)
SteveWMD - 25/02/2023
Help, does anyone have the bill of materials? The article does not have it and the plan does not show it. Some parts are not recognisable in dimensions, and also no material is given.
xflieger - 24/09/2023
Add a comment



Download File(s):


* Credit field

The Credit field in the Outerzone database is designed to recognise and credit the hard work done in scanning and digitally cleaning these vintage and old timer model aircraft plans to get them into a usable format. Currently, it is also used to credit people simply for uploading the plan to a forum on the internet. Which is not quite the same thing. This will change soon. Probably.


This model plan (like all plans on Outerzone) is supposedly scaled correctly and supposedly will print out nicely at the right size. But that doesn't always happen. If you are about to start building a model plane using this free plan, you are strongly advised to check the scaling very, very carefully before cutting any balsa wood.


Terms of Use

© Outerzone, 2011-2024.

All content is free to download for personal use.

For non-personal use and/or publication: plans, photos, excerpts, links etc may be used, provided that full and clear credit is given to Outerzone with appropriate and specific direction to the original content i.e. a direct hyperlink back to the Outerzone source page.

Unauthorized use and/or duplication of this material without express and written permission from this site's owner is strictly prohibited. If we discover that content is being stolen, we will consider filing a formal DMCA notice.