Chainsaw Repair

maybe of benefit to help obtain port widths by tracing with paper and pencil.  probably the only way to get port corner radii, as well.

guide found over at macdizzy site: http://www.macdizzy.com/cylinder_map.htm

(widths and radii, will be necessary for program to compute port areas).

note:  the guide does not show how to get the port corner radius.  easiest way is to then lay the paper flat.  put a circle drawing template, on the port corner until one is found to match.  the circle drawing template sizes circles by the diameter.  so this number will need to be divided by 2 to get the radius.

you can buy circle templates for just a few bucks at office supply or sometimes at art/craft stores.

-joe