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Ken-ichi Tsuzuki    Tokyo, Japan      7/8/2006  

1/4 scale Kinner K5 radial aero engine

 bore: 27mm, stroke: 33.4mm, compression ratio: 9

displacement: 95.6cc

lubrication: dry sump, oil tank volume: 28ml oil pressure: 0.15 to 0.2MPa (with relief valve) 1000 to 4500rpm with diameter 22inch pitch 10 inch props.


The drawings of this engine can be found in SIC Issue: #36,37,38,39 & 40.

 This engine was designed by Merritt Zimmerman.   I built it according to the articles by Pieter Dekker.   It took 2 years and 5 months to build it.

 This engine needs rich gas condition at cold start probably because of wide space after the carburetor. So I made choke valve.  It works well.


And this engine has very small distributor and Peter Dekker wrote that it caused ignition trouble.

So I used direct ignition system.  For direct ignition system, it needs 5 ignition coils.  I made ignition coils according to Bob Shores "Ignition coils and magnetos in miniature"  This book is very interesting  and my coils works well.


my web site is

 and you can see the video of my engines here





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