This is a rig to find TDC firing number one rotor. This must be known to
compare any porting figures from known engines or published tables.

The angle stock pivots on a piece off a cut off case bolt. At TDC the

edge of

the angle stock must be exactly parallel with the vertical. I used the

water

seal marks to measure from to establish that relationship. The distance

from

the crank throw to the dial indicator doubles the amount of movement and

makes

resolution inside of one degree possible. Once you establish TDC, rotate

the

degree wheel, so that TDC is directly under your pointer. Lock down the

crank

nut, and the pointer mounting system. Remove the crank being careful not

to

disturb the degree wheel. Assemble the rotor housing and dowels and a

rotor.

Reinstall the crank and begin to investigate various timing events.

Lynn E. Hanover

Lynn,
Thanks Mate!!
I was hoping for something easier, but I've got to sort this out as it is
bugging me and the timing has always been a mystery to me.

So when I get to this stage, what are we looking for?
Do I have to put in the rotor to see that the side seals are doing or do I
work off the apex seal location.

Excuse the ignorance here mate - I am at a complete loss with all this stuff
on timing.

If you have any good stuff on timing (other than what we have), feel free to
send it to me direct lendich@hypermax.net.au  I need all I can get.
George (down under)

 
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.