S-4 Kania (oz2548)

About this Plan

S-4 Kania. Trevor Faulkners delightful scale rubber S-4 Kania posted by Algy2.

Quote: "I started looking for high-wing, swept back prototypes with reasonable tail areas and moment arms. The Polish Kania didn't seem to have caught anyone's eye, and so the Aeromodeller scale drawing no 2927 was purchased. After a bit of debate between ambition and common sense it was decided that:

1. The scale would be a multiple of the 1/16th scale drawing.
2. A reasonably tough construction would be used.
3. Motor run would have a fair amount of punch, to avoid the prolonged glide type of flight to which Mr Coates refers.
4. A step-up gear would be use to carry the rubber without tensioning turns and allow a smaller blade prop to be fitted.
5. Wings to be detachable.
6. Undercarriage to be sprung.
7. Model would be made to fly (if at all possible) before detail finishing.
8. Tailplane and rudder would be variable for trim, then secured.
9. The entire project was aimed at the production of a flying model.
10. The model would not use exotic materials (ie Jap tissue, 1/16 in square rubber or expensive bought-in parts), nor would finishes other than those applied by brush be used.

Eventually the drawings were redrawn twice full size, giving a span of just over 2 ft. Consideration of the fuselage sections showed a close approximation to circular sections, or semi-circular linked by straight parallel sides. The draughting of the fuselage was in fact very easy...

Update 05/01/2017: added article, thanks to RFJ.

Supplementary file notes

Article.

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