Different designs for 2-strokes? Didn't know about this.

[ANewSawyer]

http://www.pattakon.com/pattakonPatAT.htm

Was googling for variable exhaust port timing thanks to the pipe building theroy thread below. Found this link, it is a windowed piston design two stroke where the connecting rod covers a window in the piston to keep mix from passing into the transfers. Cool. But I still don't know what variable exhaust port timing is!

 

[Stihlbro]

Very interesting read. Thank you for sharing. The concept seems to apply more to a longer stroke 2 stroke than what a chain saw offers. Myself, I will have to read again and believe I may have a different view. Thanks again!

Variable exhaust timing for what I know is like the power valve in a motor cycle. Google that and it should answer your question.

Joey

 

[Adirondackstihl]

Or an exhaust/power valve on a modern 2 smoke motoX bike

 

[Chainsaw Jim]

So x-torq and m-tronic are ideas based on airplane cylinder designs?