Minimoa (oz1033)


Minimoa (oz1033) 1946 - plan thumbnail

About this Plan

Minimoa. The famous 1930s German sailplane by Keil-Kraft. This version of the Minimoa plan has re-drawn wing ribs.

Note the KK Minimoa kit was released in 1946. This here is the nearest thing we have to an original plan. Plan clesnup by Planeman

Note see 2011 RCGroups thread at for some discussion re airfoil and ribs.

Quote: "There have been some complaints that the ribs taken from the kit were not sized correctly and in addition appeared to have a somewhat bizarre airfoil. After some discussion online it was decided to add an extra set of ribs with an Eiffle 400 airfoil fitted to each rib position on the plan. This copy of the Keil Kraft Minimoa plan has this addition."

Update 30/11/11: johnwynn40 mailed in to say: I have my original minimoa and the wing section is as the lower right ones recommended. I dont know where you got the strange ones as shown on the top right!

Update 14/06/2013: Added supplement file of printwood scan, thanks to vintage1. This is scanned from the actual kit, and shows all ribs. 6 pages.

Update 31/12/2020: Have replaced this plan with a corrected version, with thanks to Jack Shettle. This has fixed a few issues with the (see supplement) previous version. Have removed both the 'bizarre' rib set, and the 'alternate' rib set (both not original) have removed the 3-view, have removed incorrectly scaled printwood. That only leaves the main plan sheet. Have then inserted (correctly scaled) printwood as pages 2-4. Hopefully this is all now correct. Famous last words.

Note also see RCGroups post by Ian Laing at for an alternate scan of the original kit printwood, including all ribs.

Supplementary file notes

Previous scan version.


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Minimoa (oz1033) 1946 - model pic


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Minimoa (oz1033) 1946 - pic 003.jpg
Minimoa (oz1033) 1946 - pic 004.jpg
Minimoa (oz1033) 1946 - pic 005.jpg
Minimoa (oz1033) 1946 - pic 006.jpg
Minimoa (oz1033) 1946 - pic 007.jpg
Minimoa (oz1033) 1946 - pic 008.jpg
Minimoa (oz1033) 1946 - pic 009.jpg

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User comments

last new formed rib is to small, Steve.
anon - 07/07/2015
Here are some pics of my recently completed Minimoa [model photo & more pics 003-006]. The build thread is to be found under the RCGroups OZNopic build-off [see]. Trimming is not complete yet but I hope soon to send you a pic of the bird in the air.
NicholasTucker - 27/03/2019
Dear Sir, I have been trying to make sense of the Minimoa download for a couple of days now and still at a loss as to what is correct.
I down loaded the KK plan together with the parts sheet. After measuring the wing plan it measured 24 inches. Times two plus a couple of inches for the fuselage gives the correct 50 inch span. All the wing ribs seem to fit the plan OK, but and this is the big problem, none of the fuz formers are big enough. If you download the sheet taken from the KK kit none of the formers are big enough to bridge the gap between the top and bottom keel. If as I said in my comment the formers are enlarged to 120% everything fits. Is there anything you can say to put my mind at rest. The Keil Kraft parts must be correct so how is the plan too big if the wingspan is correct at 50 inches? Regards,
Jack Shettle - 31/12/2020
Thanks Jack, you're right. See update, have fixed this now.
SteveWMD - 31/12/2020
Hi, as per previous comment about the fus. formers being to small, this is still a problem ( All the wing ribs etc. are ok ) does anyone know how to correct this please !!
David - 05/04/2021
I think you might be using the old printwood file. Have now deleted that file, to remove any confusion. If you use the main planfile (4 pages) and use the printwood included in that, do you still see an issue?
SteveWMD - 07/04/2021
The older print wood is closer but still not quite right and somewhat distorted (by planeman)- off by a 1/16 in height in some cases plus upper and lower slots are not equal (7 mm) required. Just did a cad layout of the old fuselage to check the bulkhead vertical dimensions and then the new and they match. The Bulkheads need to be redrawn.
Gene Rock - 07/04/2021
Help is on the way with corrected bulkheads and ribs in about a month.
Gene Rock - 12/07/2021
re help on the way, see Minimoa (oz13209) now for Gene's new version of the Minimoa plan, redrawn from scratch.
SteveWMD - 01/08/2021
Hi, For no particular reason I was thinking about a balsa plane I made over 50 years ago, when I was living in the UK. I left the UK in 1967 and have lived in Australia since then, only recently (after retirement) starting to play with my toys again. The last balsa plane I made before leaving was the Minimoa, and after Googling the name I found your web page, with the request to send any photos. So here it is [pic 008] - pretty scratchy, as it's been scanned from a 35mm slide, but you can still get the picture. It never actually flew, as my mate who was carrying it up to the moors (Baildon, Yorkshire) for its maiden flight managed to break one of its wings and what with birds, booze (I was 22 then) and packing up for the Australia trip I never got round to fixing it. Regards from Champion Lakes, Western Australia,
Tony Wood - 10/08/2021
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