<<  How about when the engine is together? Could you do it by seeing when the
volume of the combustion chamber is neither decreasing or increasing? Not as
exact, but what other measurement would you use?
 >
 > Brian Trubee
 
If the engine can be on its side with plugs up (sorry):
Pour some gear oil into the front rotor housing. Turn the engine over a few
times and stop it at indicated TDC. Make a spark plug hollow with a hammer and
a punch. Solder in a length of brake line tubing into the plug. Connect a
length of clear plastic tubing to the plug. Pour water with food coloring into the
chamber. Fill the tubing with the same. Screw in the plug. rock the engine
back and forth over TDC. When the water in the tube is at the highest point,
that is TDC.

Same for right side up, just leave in the bottom plug and fill the chamber as
high as possible, then install the special plug and continue.

Spin up the engine with the plugs out, to clear the water. It won't hurt
anything.

Lynn E. Hanover

Put a 90 degree bend in the brake line tubing and you can do it with the engine
right side up. Use ATF and you won't have to worry about the water rusting
the inside of the engine.

Paul Lamar
 
The AirCraft Rotary Engine NewsLetter.  Powered by Linux.
ACRE NL web site. http://home.earthlink.net/~rotaryeng/            
Copyright 1998-2003 All world wide rights reserved.