Quote from: HornetMaX on December 23, 2014, 10:30:25 PMQuote from: Furious on December 23, 2014, 09:35:49 PMOK. It's just that it looks much "thinner" (overall) and much less triangulated than anything else I've ever seen (on recent motorbikes).
Swing arm is calculated for stiffness so it's ok.Quote from: Furious on December 23, 2014, 09:35:49 PMYes, but I don't understand why you can do without that. Looking at the video (assuming I get the principles right) you should have the same efficiency boost (and associated emission reduction) from a properly tuned exhaust.
Exhaust is also proper for this (not conventional) type of 2 stroke engine, as there is no back air load from (exhaust boost) exhaust pipes.
But to be honest I'm not sure I do understand exactly how it works: in particular, the road followed by the fresh air+fuel in the video below. Is the air injection chamber on top like a torus with ports on 3 "sides" of the cylinder (back, front and right) while the exhaust is the one on the left ?
I'm really no expert on all this, but one thing that strikes me is that I see a lot of sliding surfaces (with holes, lubrication is tricky), much more than on a conventional engine (2 or 4 strokes).
Interesting project anyway, good luck and keep us posted !!
MaX.
Those big exhausts for old 2 strokes has one purpose. Using the reflected pressure effect to put back the air-fuel-oil mixture into cylinder. As we are rinsing the cylinder with the fresh air and after that inject fuel there is no purpose in those type of exhaust.