Hi Paul and All

On the issue of TDC, where is it on a rotary?
At min chamber position (max compression)?

Steve Izett
Perth WA
Building Renesis 4 Port Glasair SIIRG

It is when the front rotor has minimum chamber volume
adjacent to the spark plugs.

It can be detected in several ways. If you fill the chamber with
oil and connect a transparent tube to the chamber through the spark
plug and slowly turn the e-shaft the oil in the tube will
rise and fall. When it is a minimum that is top dead center.

Here is another way of checking it if the engine is apart.


Paul Lamar