RandyMac
Stiff Member
If you were paying attention, you would have noticed, that I was talking to your mule. I thought that was you I kicked.
design of modern chain saws.
- Thread starter sodbreaker
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If you were paying attention, you would have noticed, that I was talking to your mule. I thought that was you I kicked.
sodbreaker
ArboristSite Operative
Or more effeciently designed cooling fins to channel air flow better, bigger/ taller fins on the flywheel or even a cooling fan seperate from the flywheel for that matter, any number of solutions
Actauly what I am talking about is this attitude that saws are "good enough" and how that hinders our ability to get out of the fore mentioned rut that we are in, in terms of chainsaw design.
Sod breaker
ckelp
just being myself
there coming out with a saw that has a monkey with a chromed 1911 on board constantly tuning the carb:msp_rolleyes:
woops i forget there switching to FI so a monkey with a chromed 1911 on board at a computer tuning the mixture
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RandyMac
Stiff Member
There is only so far you can go with any design, a new type of power is needed, the two stroke is near the end of it's design life. Look at the added garbage already, due to EPA and stuff. However it goes, the premix fueled, piston motors are on the way out.
Mastermind
Work Saw Specialist
Forced induction won't really work on a two stroke. It would just blow fuel outta the exhaust. EPA would have a #### fit......
Tuned expansion chambers.........oh yeah that been done. Hell it's all been done.
If it's new tech you want check under the hood of the M-Tronic and the Autotune saws. What about Stratified two strokes???? Hell man pay attention......lots of new and exciting stuff is happening right now.
Tuned expansion chambers.........oh yeah that been done. Hell it's all been done.
If it's new tech you want check under the hood of the M-Tronic and the Autotune saws. What about Stratified two strokes???? Hell man pay attention......lots of new and exciting stuff is happening right now.
WHERE IN THE #### , Do you think your going to get a turbo and a pressurized Air induction system THAT small. And have you done any BLOWTHROUGH carb tuning (electric fuel pumps, check valves, pressure sensors...) and how are you going to channel the exhaust into the turbo? Oil the Turbo? Heck, where would you put the turbo to start with?!
I have turboed sleds before, and it is NO EASY TASK! there is barely room to fit a system on a 500lb sled more or less a 15 lb chainsaw. I mean come on. If you can do it, I will SERIOUSLY pay you 100 bucks, just to say sorry. But Im calling you out. It is not possible. Like previously mentioned, Two stroke engines, are not advancing ANY farther. Unless someone creates a lubricant that can replace bearings, a crank that can support 300 psi cylinder pressures, and a rod that is stronger than diamond. It WONT HAPPEN! there are one thing that is booming with Two stroke engines nowadays, and that is Coated cylinders and pistons (Moly), there is a company in town that fuses nanotechnology particles to metal surfaces, reducing friction by half, and strengthening parts. It costed 3 grand to coat a 1/4 inch drill bit to test it. NOT CHEAP! give it 20 years, then you may be able to afford it. Thanks sir!
And forced induction can work on a larger two stroke, but i will not work on a below 200 CC open port(no reed valves) engine. WILL NOT WORK!r
I have turboed sleds before, and it is NO EASY TASK! there is barely room to fit a system on a 500lb sled more or less a 15 lb chainsaw. I mean come on. If you can do it, I will SERIOUSLY pay you 100 bucks, just to say sorry. But Im calling you out. It is not possible. Like previously mentioned, Two stroke engines, are not advancing ANY farther. Unless someone creates a lubricant that can replace bearings, a crank that can support 300 psi cylinder pressures, and a rod that is stronger than diamond. It WONT HAPPEN! there are one thing that is booming with Two stroke engines nowadays, and that is Coated cylinders and pistons (Moly), there is a company in town that fuses nanotechnology particles to metal surfaces, reducing friction by half, and strengthening parts. It costed 3 grand to coat a 1/4 inch drill bit to test it. NOT CHEAP! give it 20 years, then you may be able to afford it. Thanks sir!
And forced induction can work on a larger two stroke, but i will not work on a below 200 CC open port(no reed valves) engine. WILL NOT WORK!r
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ozflea
Good ol' BP Zoom 25-1
What about reed valve mufflers like on the 10 series Mac's
RandyMac
Stiff Member
There is a big inch Remington, don't remember which model, it used air off the fan to pressurize the airbox. That was probably over 40 years ago.
BTW that Remington uses that new fangled horizontal cylinder.
BTW that Remington uses that new fangled horizontal cylinder.
ckelp
just being myself
husky air injection?
RandyMac
Stiff Member
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sodbreaker
ArboristSite Operative
Jonsered, husky and the newer Stihls have what for pratical purposes is a primitave supercharger. That increases presure. so it can be done a turbo is just a different way of doing the same.
I've seen those RC cars with turbos, the size of those engines would be similar to a chainsaw engine.
"The ability to improve is only limited by one's ability to dream."
To the above I'd add that we must be limited in our ability to dream
Sod breaker
I've seen those RC cars with turbos, the size of those engines would be similar to a chainsaw engine.
"The ability to improve is only limited by one's ability to dream."
To the above I'd add that we must be limited in our ability to dream
Sod breaker
Been many changes updates, mostly stupid ones. Eg flippy caps, fitted lazer guide beams, anti kick back bar tips, trio brake, no tool adjustment, the basic design will works well enough, I just wish they just leave it be. Still I.m hopin for a 4 stroke honda type power plant.
go on lad, dare you to dream sodbreaker
go on lad, dare you to dream sodbreaker
Sapo_feo
...
The guy who first talked about using piston porting instead of reed valves probably took some abuse too. All these years later it still seems to work. All it takes to change an industry is one good idea, and all it takes to go broke is a few bad ones. Or a good one without a great lawyer.
RandyMac
Stiff Member
Piston porting is older than reed valves.
MtnHermit
ArboristSite Operative
Seems to me you'd have to go 4-stroke, because all 2-strokes depend on the scavenging effect of the tuned exhaust to clear the combustion chamber, a turbo would add back pressure defeating the exhaust scavenging.
Light weight is the driving force behind selecting 2-stroke over 4-stroke for a chainsaw. Formula I race cars probably put out more power per pound, but they spin much faster and are very sophisticated 4-stroke engines. Besides, a F I engine only has to last a few hundred hours.
Sapo_feo
...
That is one of the many things I didn't know. All the old 2 man saws I've seen had reed valves, not that I've seen many. I knew of 1930's industrial engines that were piston ported, but not saws.
sodbreaker
ArboristSite Operative
While were at just put a rotary engine on it and be done with it.
BTW does anyone else rememer the saws years ago that had a blade that moved back and forth instead of a chain?
RandyMac
Stiff Member
I really think, sadly due to emission laws, that one day all chainsaw's will be battery powered and we will all be in the woods whirring away like we are using a rampant rabbit vibrator :hmm3grin2orange:
Stihl have a battery powered one for sale now, anybody tried it out ?
Stihl have a battery powered one for sale now, anybody tried it out ?
