tree monkey
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@wcorey
How are ya Bill. See you soon bud. Found this interesting pic on EBay. I'm still trying to understand these stratos. I guess the piston acts as the chamber and the port?
MS261
View attachment 63448
strato saws are complex, but the basic function is simple. fresh air comes in through the port on the lower right,(in the pic) through the channel in the piston and down the transfer ports to the crank case. the fuel charge enters through a conventional port to the crank case. on the down stroke, the fuel charge is pushed up the transfers, pushing the fresh air, trapped in the transfer tunnels, into the combustion chamber clearing the spent charge ahead of the fresh charge.
the transfers flow both ways.