Kapitan (oz871)


Kapitan (oz871) by B Pilar 1946 - plan thumbnail

About this Plan

Kapitan. Free flight power model, for 1 - 2cc diesel engines.

Quote: "Diesel Engines in General: The introduction of miniature compression ignition, or 'diesel' engines, to the British market has placed all the pleasures of motor-powered flight within reach without any of those disappointments commonly associated with the internal combustion engine, or rather with its accompanying electrical paraphernalia. Whether the builder decides to make his own engine or buy a ready-made commercial product he is assured of trouble-free flying from the start, provided he bears in mind a few simple basic principles. In the absence of any ignition accessories, all faults in starting must be in the engine. They can be due to :

(1) Poor compression. This fault will normally occur only in amateur-built engines, as all commercial types are tested before delivery—unless an old engine is acquired second-hand. The cure, of course, is to make a new piston, this time to finer limits.

(2) Incorrect mixture. If the maker's instructions have been followed this will probably be due to evaporation of the ether. Freshly-made mixture and a tightly-corked bottle will overcome this.

(3) Incorrect needle setting. C.I. engines are most sensitive and often need only a quarter turn adjustment between excellent running and failure to start. Having ascertained the optimum position by bench testing, note it carefully for the future.

(4) Incorrect adjustment of contra-piston. This is a trial and error procedure - and again the best position should be noted. Some continental engines have fixed compression and rely entirely on correct needle and mixture control.

If the engine is still obstinate, then enough mixture is not getting through, or conversely too much. Patient checking of these details will ensure a start. No matter how long this may take in the 'apprentice' stage, there will be no flat battery trouble!

A final word of warning. Beware of over-choking. Just enough to make sure the mixture is through should suffice.
Having disposed of any gremlins that may be lurking round the engine, let us consider the construction of 'Kapitan'. This model is a proved machine, developed over several years by a well-known Czech firm. Originally designed for all hardwood construction, it is even more attractive in balsa, as a monocoque fuselage may be employed.

While not exactly a beginner's model, it is one that may be attempted with confidence by any model-maker who has built a sailplane of equal span, as there is nothing tricky in assembly, wing fixing, or trim.

The Fuselage: Cut out formers of materials specified, notching for longerons with the side of a fine file. Fix top and bottom longerons first, holding them in place with rubber bands until cement is dry ; then add the remainder in twos to avoid distorting the shape. This can safely be judged by eye, though there will be some who prefer to build on a jig..."

Update 15/12/2017: Replaced this plan with a clearer copy thanks to Circlip, along with article thanks to RFJ.

Supplementary file notes

Previous scan version.
Article pages, thanks to RFJ.


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

Kapitan (oz871) by B Pilar 1946 - model pic


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

User comments

No comments yet for this plan. Got something to say about this one?
Add a comment



Download File(s):
  • Kapitan (oz871)
  • Plan File Filesize: 522KB Filename: Kapitan_FF_49in_oz871.pdf
  • Supplement Filesize: 444KB Filename: Kapitan_FF_49in_oz871_article.pdf
  • Supplement Filesize: 847KB Filename: Kapitan_FF_49in_oz871_previous.pdf
  • help with downloads


* 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.