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Built Review
Telemeter KDO Mod.40
Telemeter KDO Mod. 40 with Trailer
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by: Dave Shick [ ILLINI ]


The Kommando-Gerät 40 is an anti-aircraft fire director used principally for major caliber weapons such as the 8.8 cm FlaK 36 and 10.5 cm FlaK 40. However, by installing the proper ballistic cams, it may be used with any type of gun. The director is basically an analog computer that uses visual observation to solve the firing parameters.

The director is operated by five men. Two are required to track in azimuth (horizontal angle to the target) and elevation; a third sets in slant range (straight line distance) by means of a 4-meter base stereo range finder mounted on the director; the fourth man sets in horizontal angle of approach; and the fifth man operates various switches. By continuously monitoring these parameters, in sync, a whole variety of values can be calculated, such as speed, direction, etc. This machine did this using analog devices, no Pentium chips here!

The director computes continuously by using a target speed and angle of approach method, and can handle diving and curving target courses. The time from initial pickup to first round is estimated to be 20 or 30 seconds. When shifting to a new target in the vicinity of the target previously tracked and flying an approximately parallel course, as little as 10 seconds may be required

The slant range (linear distance to the target) was accurate up to 18,000 meters (11.2 miles). This is about the maximum range of the Flak 40. A trailer equipped with devices for lifting the director is used for transport. However, one reference indicated the delicacy of the optics might have made transport impractical. Therefore, its use might have been limited to fixed batteries around cities and such, where the Luftwaffe deployed its AA guns in batteries of 4-6 pieces. Allied air crews hated FlaK, so apparently the device was effective.

What’s Inside

The kit comes packaged in a typically-sized box from Bronco. However, the box is mostly empty, so the sprues can rattle around. I found no damage, however I think a smaller box— or some padding— would be appropriate.

This is basically two kits in one: the director itself and the transport trailer.

The director consists of three unique sprues, and a photo etch sheet.

• B has the body of the director, range finder tube and parts of the base
• C (x2) has various small bits
• Db (there’s a Da) has parts for the crucifix base
• PE sheet has grill work for the base and other details

The transport cart consists of two unique sprues

• A has the main structure and suspension
• Da (x2) has the wheels and associated bits
• The PE sheet above has many parts (all small) for the cart

The instruction booklet is printed on twelve glossy A4-size pages. This includes an introduction, guide, sprue inventory, construction steps, and painting guide. There is a separate two-sided painting guide for two additional options.

The review

This is a really nice little kit.

As I said earlier, it is really two kits.

The director itself is a quick and easy build, with one exception: I managed to break two of the “grab handles” (part C3) attenpting to attach them. They are very thin and brittle. I ended up getting out my Grab-Handler and making my own. I think if you added these before assembling, the two halves of the tube you wouldn’t break them– then. However, given my clumsy fingers I’m sure I would have broken them eventually.

One picture I found (taken from Wikimedia here) shows an intact director (very rare) in a museum. This and other photos found in the references indicate the model is a very accurate representation. I only question the overall height. Period pictures show the operator standing well over the console, and men weren’t so tall then. I posed a figure next to the console, and he doesn’t clear it like the pictures. The other issue would be the binoculars at the far left in the picture: an operator would need a step stool to use them– by scale these would e over six feet off the ground.

Bronco has gotten a lot of miles out of the crucifix base and the trailer, with the latter used in at least two other kits that I can find, and the base once. The trailer isn’t large, but it’s a much more complex kit than the director. I didn’t attempt to find resources to verify its accuracy.


The director would look very cool in a diorama with one of the large FlaK guns. It’s an unusual subject, but an essential part of any anti-aircraft unit. The guns themselves have any number of kits; it was time for a “support” piece.

Googling (who’d have thought there’d be such a verb) Telemeter KDO produces very little but references to the kit itself. I tried KommandoGerät 40 and found several useful sites, which I won’t list; you can do your own Google.

I did find one site that had a few pictures of the director in use here. There are many related pictures, and you have to scroll down a ways to get to the ones you want.
Highs: Nice little kit of an unusual subject. Will look very cool in a diorama with FlaK artillery.
Lows: The transport trailer doesn't seem very useful, and mostly serves to justify the price.
Verdict: A must-have for a diorama including any of the larger FlaK artillery pieces.
Percentage Rating
  Scale: 1:35
  Mfg. ID: CB35103
  Suggested Retail: $31
  PUBLISHED: May 23, 2012

About Dave Shick (Illini)

Copyright ©2020 text by Dave Shick [ ILLINI ]. All rights reserved.


I saw that, too. Good planning on their part.
JUL 11, 2017 - 09:06 AM
Just playing around with several models I had at hand:
JUL 12, 2017 - 10:13 PM
I bought this kit yesterday, and was reminded on the conversions to tow this apparatus. Never took the look behind the link Michael provided, until this afternoon. Holy Crap! The conversion for a Büssing L4500A got me almost knocked out. Pricing is relatively ok, Büssing kit from AFV Club was already on my shopping list, so... maybe have to wait for my next salary, but oh boy, how very nice that looks. Anyone build this conversion? Looks really the part (I will not look at the Vomag, I not an addict) Kind regards, Robert Jan
JAN 08, 2019 - 02:42 AM
I took a different path now, because from the expensive AFV only the chassis would support the completed conversion. Also this is where I started planning the load for my train. The IBG kits have a lot of freedom / opportunities to fix the conversion for a SdKfz 415. Nice to have some pictures for the rangefinder. Robert Jan
MAR 13, 2019 - 03:22 AM
Robert I would love to see even a crude drawing of what you have in mind for your rail loading diorama. As you know I am doing a couple of rail related projects and am looking for all kinds of new ideas.
MAR 13, 2019 - 06:22 AM
MAR 13, 2019 - 01:40 PM
Hi Michael. My crude plan is to make use of a system that already exist in Railroad modeling. Fine scale have an almost ISO approach for module building, its called FREMO. You can download such plans for e.g. H0 scale. It gives exact measurements for display and is perfect to connect new sections, building a diorama. Plan is to build a platform where material is lined up, waiting to mount the train. For the layout I want to use photos from the old train stations, which you can find easily on the web. The track on such a module / section is always the centerline or connection. I have to search for some practical information to make it work for me when it comes to scale metal tracks and wooden sleepers, I've seen already (and not too expensive). Will post more info on this very soon. In the topic that has more connections to loading this train. Kind regards, Robert Jan
MAR 14, 2019 - 03:21 AM
Sorry I thought you were talking about a static 1/35th scale display diorama not a complete working modular layout. WOW! My current plans encompass two parallel tracks each about 30-36" long, the rear one with already loaded flatcars and the front track loading a tank using the ramp I have already shown elsewhere. p.s. I just re-read your post over on the SSys thread and now understand your reference. You are thinking of scaling up a standardized HO model railroad module to 1/35th scale by following the FREMO standards for these interchangeable modules.
MAR 14, 2019 - 05:23 AM
Nice links to be discovered. I suddenly read French and understand! Looking for the aggregate and big splitter / control boxes, this brings me closer to sources. Kind regards, Robert Jan
MAR 15, 2019 - 02:33 AM

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