Love the analogy to the gunJ.A.W. wrote: ↑Wed Mar 28, 2018 1:52 pm"Most important" Manolis?
Important, to be sure, but really only an important parameter among many in the internal combustion mill..
Gas turbines for example, have had their combustion process worked out for decades, but the gas-pumping
/fluid work part of their function - has been a real struggle to achieve overall "efficiency" in fuel use terms.
The 'simple' 2T has, for over 60 years, been seen as an inexpensive method to harness a pulse-jet to shaft work.
& it is the overall cost-benefit ( notwithstanding the dreaded 'marketing' dept) which keeps interest going.
After all, automatic firearms have, for well over a century now, been an example of practicable 2T function.
A firing stroke does the 'work' & vents waste - while the recoil ( recip') recharges on the upstroke..
No one would now consider having an extra two non-productive strokes in a gun - to be anything but a waste.
Seems you are still not getting it Mudflap..
Sure do, Johnny - if only as a cogent example of why a practicable performance 4T chainsaw is a non-event..
Its amazing isnt it, as they say "only in America" but these days Scandinavia too -https://www.youtube.com/watch?v=tdIB-jUa6-E
on the 750 a good example of when the pulses sync and notJ.A.W. wrote: ↑Wed Apr 11, 2018 5:06 amThis dyno chart shows what a 'backyard tuner' has obtained from a real basic ( 45 y/o!) Kawasaki 750cc 2T roadbike engine..
https://www.tapatalk.com/groups/kawasak ... C-0776.JPG
& for contrast, this - 'Ronax VS Suter' - vid shows a pair of 'big bucks' 2T G.P. race-replica track bikes doin' their stuff..
J.A.W. - the last of the above, 4T running on fuel/oil mix - presumably that is the Stihl 4mix and similar you are referring to. Where? In your home country (Australia?)?
Yeah P, its about 'good lugging power' apparently, but that's not much good for a chainsaw.. strat charge is..Pinger wrote: ↑Wed Apr 11, 2018 10:46 amJ.A.W. - the last of the above, 4T running on fuel/oil mix - presumably that is the Stihl 4mix and similar you are referring to. Where? In your home country (Australia?)?
I've read about their development in American documents but no one in the UK knows anything about them. I suspect they weren't marketed in Europe (strat charge being the preference). Other than the USA, where were they sold? Why not in UK (Europe?) and why chosen rather than strat charge? Any ideas anyone?
Is there an echo here J.A.W.?J.A.W. wrote: ↑Wed Apr 11, 2018 12:41 pm
Yeah P, its about 'good lugging power' apparently, but that's not much good for a chainsaw.. strat charge is..
https://www.stihl.com.au/4-mix-engine-l ... power.aspx