Klemm L25d (oz3159)


Klemm L25d (oz3159) by Karl-Heinz Denzin 1969 - plan thumbnail

About this Plan

Klemm L25d. Low wing German trainer. Wingspan 1860 mm. The kit was by Krick. Scale is 1/7.

Quote: "I've had this kit for at least 20 years. There isn't any date on it. I just redid the plans."

Direct submission to Outerzone.

Update 12/11/2022: Added kit instructions (in English and German) along with parts, thanks to Paul Sluce.

Quote: "G'day, I was lucky get a complete Krick Klemm L25D kit for my Birthday recently, so attached are scans of the manuals plus high def scans of the parts sheet. Happy flying. Paul Sluce"

Quote: "Krick. Building Instruction for Glow Engine Version of Klemm L25d.

General Instruction: In the last few years before WW II the 'Klemm 25' with its various sub-types was the most widely used sports aircraft in Germany. Of all-wood construction and moderately powered, it was the cheapest aircraft of this period, but excelled by its foolproof flying characteristics and versatility. It was the standard 'ab initio' trainer as well as glider tug, enthused the spectators of many air shows when stunted by Ernst Udet at extremely low altitudes and was flown round the world by Elly Beirihorn.

Our 1/7 scale model was based on the sub-type L25d. It is not-only absolutely true to scale (with exception of the airfoil), but has very similar flying characteristics as the original as well. The short take-off run, good climb, low speed, excellent stability and the slow and flat glide make it an ideal model for the Sunday flier, but it's manoeuvrability under full power will satisfy experts as well.

The markings of the model were taken from a Klemm L25d which was based at Karlsruhe Airfield in summer 1935 and competed as No.4 in a squadron of seven in the 'Deutschland-Rundflug' of the same year.

Building Preparations: To speed construction and to familiarize yourself with this model, cut out all plywood parts with a fret saw, remove all balsa parts from diecut sheets, sort out all parts on the plan, drill the necessary holes as you go along and put the parts away as they belong together. Then cut and sort all strip and wire material as per following list, using plans and parts list as reference.

Fuselage Construction: Please note the following points when strengthening the fuselage (1) which is put together with the front and rear parts: The doublers (2) leave a 3 mm gap at the sides of the fuselage, are even at the bottom, and jut out a bit at the top. Between the doublers (2) and front vertical braces (8) is a 3 mm gap for former (10). The longerons (3) will only be cemented with half of their width on the fuselage sides which will therefore jut out about 2 mm at the top. Longerons (4 and 7) will end 6 mm before the end of the fuselage sides.

Before completion, please do not forget to drill 2,5 mm diam. holes in former (11) and 3 mm holes'- tailskid strut (55) for the wing mounting bracket (12) and to cement mounting nut (17) under the stab mounting plate (16). A 250 ccm tank fits perfectly into the recess in former (9).

Starting at the widest part of the fuselage, attach formers (10) and (11), as well as the two braces (14), to the fuselage. Attach the remaining formers working from the center outward.

To fit the motor optimal on the engine bearer, please do the following: Join engine bearers, parallel with one another, with scrap plywood and nails between engine back end and first former in the correct distance. Then, in consideration of 2° right thrust, drill holes and cut out the inside of the engine bearers so the engine housing fits exactly. Then cement the bracing strips (2Q) on thp brapingplates (19) and them on the engine bearers, so yoU are finally able to push the whole construction; at one time, into the fuselage and cement.

After finishing the fuselage back (27-33) and the planking of the bottom, glue in both cockpit bottom plates (26) from below after cutting out 4 x 4 mm recesses in every corner..."

Supplementary file notes

Instructions (En).
Instructions (De).


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Klemm L25d (oz3159) by Karl-Heinz Denzin 1969 - model pic

  • (oz3159)
    Klemm L25d
    by Karl-Heinz Denzin
    from Krick
    74in span
    Scale IC R/C LowWing Civil Kit
    clean :)
    all formers complete :)
  • Submitted: 28/07/2012
    Filesize: 879KB
    Format: • PDFbitmap
    Credit*: pd1
    Downloads: 11577

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    ScaleType: This (oz3159) is a scale plan. Where possible we link scale plans to Wikipedia, using a text string called ScaleType.

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Klemm L25d (oz3159) by Karl-Heinz Denzin 1969 - pic 003.jpg
Klemm L25d (oz3159) by Karl-Heinz Denzin 1969 - pic 004.jpg
Klemm L25d (oz3159) by Karl-Heinz Denzin 1969 - pic 005.jpg
Klemm L25d (oz3159) by Karl-Heinz Denzin 1969 - pic 006.jpg
Klemm L25d (oz3159) by Karl-Heinz Denzin 1969 - pic 007.jpg
Klemm L25d (oz3159) by Karl-Heinz Denzin 1969 - pic 008.jpg
Klemm L25d (oz3159) by Karl-Heinz Denzin 1969 - pic 009.jpg
Klemm L25d (oz3159) by Karl-Heinz Denzin 1969 - pic 010.jpg

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User comments

Hallo Steve, I've found the next very old picture [see more pics 003]. I think it's 40 years old. The builder was my friend "Norbert Studer". The Klemm was powered by a 3,5 ccm 2-stroke engine.
BernhardDittmann - 29/01/2016
Hi Steve, here some pics from the maiden flight of my Klemm [main pic and 005,006].
Doro - 16/02/2020
Doro, that is an awfully good looking model, it must have taken some effort but the outcome was certainly worth it. Scheme well chosen and fine work :-)
Miguel - 16/02/2020
Photos of my Krick Klemm 25 model [007-009].
DieterF - 14/10/2020
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Download File(s):
  • Klemm L25d (oz3159)
  • Plan File Filesize: 879KB Filename: Klemm_oz3159.pdf
  • Supplement Filesize: 680KB Filename: Klemm_oz3159_instructions_de.pdf
  • Supplement Filesize: 346KB Filename: Klemm_oz3159_instructions_en.pdf
  • Supplement Filesize: 748KB Filename: Klemm_oz3159_parts.pdf
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