ESE's works engine tuner

[Frits Overmars]

Is the 2 stroke a the stage when there is nothing new to discover with the two stroke...

The man should know...

[Frits Overmars]

Has Frits said that the piston rpm is 30,000?

Certainly not . The piston makes zero revolutions per minute, hopefully. It should only go up and down. A two-stroke piston that rotates, will break its rings.

[husaberg]

Certainly not . The piston makes zero revolutions per minute, hopefully. It should only go up and down. A two-stroke piston that rotates, will break its rings.

Frits surely they must make at least one per day

The man should know...

Nature abhors a vacuum.
Francois Rabelais

The American people abhor a vacuum.
Theodore Roosevelt


Those still out in the empires colonies are still trying to re-invent the wheel though.

[ken seeber]

Etec is direct injection, so skipping would be quite simple. Can you be sure that this is not the case?
Injecting a tiny amount of fuel at each revolution does not guarantee combustion at every revolution. For example, if it fails every second cycle, the engine will still sound like it is two-stroking. Failed combustion cycles can occur in an idling four-stroke too, so a HC-comparison must not necessarily lead to the conclusion that the two-stroke does not miss a single beat. And are these HC-data split up in idling, cruising and WOT, or do they just cover over-all usage?

Frits,
Checked with a few long lasting Orbital cronies today and they confirmed that they have never deployed a skip cycle operation in any application. They were also 98% sure that the E-Tec is the same, but certainly wasn't used in the earlier Ficht days. Because electronic systems can be well controlled from cycle to cycle, this allows them to lower the idle speed, both for fuel consumption and customer perception.
The ice cream is still here, we just call it rum and raisins, however I am not sure if it is starting to melt though.

[breezy]

Took the Ryger-kart for a little spin today.
God Almighty!
Attachment 312179 Attachment 312180 Attachment 312181

I've got a fairly good idea of what to expect from a 125 cc kart. But this....
The revcounter could hardly keep up with the crankshaft but in any case it revved much higher than a normal 125 and I reached the end of the straight-away much quicker. What a rocketship!

ok..." the rev counter could hardly keep up with the crankshaft" (not the piston going up and down) ... or semantics?

[speedpro]

This is getting boring.

30,000rpm is interesting, but only in so much as it is way out there for regular size engines. Keep the BMEP up and stop it melting and the horsepower doesn't seem unachievable, so is not particularly astounding to me. That rpm though, hmmmm!

[Frits Overmars]

The piston makes zero revolutions per minute, hopefully. It should only go up and down.

Frits surely they must make at least one per day

You mean, when you turn the whole bike around in order to ride back home, or what? Enlighten me, please.
And while you're at it: how do you attach a PDF here? I have several papers that would have looked good here; I just saw no way of posting them.

[Frits Overmars]

Checked with a few long lasting Orbital cronies today and they confirmed that they have never deployed a skip cycle operation....
The ice cream is still here, we just call it rum and raisins, however I am not sure if it is starting to melt though.

I stand corrected; you can have my ice cream, Ken.

[husaberg]

You mean, when you turn the hole bike around in order to ride home, or what? Enlighten me, please. And while you're at it: how do you attach a PDF here?

They have to be a below a certain size 2mb I think. Otherwise it is the same as added any file off your computer.
http://www.kiwibiker.co.nz/forums/at...0&d=1424068367

Sometimes if it has stuff that Is to irrelevant or just too large I will copy the text out of one or down load it as the HTML or I will screenshot it and glue it back together as a JPEG or GIF.
I sometimes add the odd irrelevant pic in there to see if anyone is paying attention.
Pretty sure TZ go his ear tugged for studying one about TZ750 intake diffusers.

Did you read the PDF? I had never heard of the Kiwi one.
As for the piston revolutions, The earth as far as I know still does a full revolution every 24 hours or so.
Sneaky I know.

[Frits Overmars]

They have to be a below a certain size 2mb I think. Otherwise it is the same as added any file off your computer.

OK, let's try (could not find a paper on TZ750 intake restrictors (I assume that's what you meant by diffusers) so I picked something about a dutch piston alloy:

Did you read the PDF? I had never heard of the Kiwi one. As for the piston revolutions, The earth as far as I know still does a full revolution every 24 hours or so. Sneaky I know.

Sneaky indeed, Pete Husa. But to show you there's no hard feelings, let me enlighten you on the Kiwi Pivotal Engineering engine.
Did I hear of it? I discussed it with its builders (they were particularly fond of the liquid-cooled inside of the piston) and took pictures, in 2005. Here they are.
(keep klicking on them for details).

[breezy]

They have to be a below a certain size 2mb I think. Otherwise it is the same as added any file off your computer.
http://www.kiwibiker.co.nz/forums/at...0&d=1424068367

Sometimes if it has stuff that Is to irrelevant or just too large I will copy the text out of one or down load it as the HTML or I will screenshot it and glue it back together as a JPEG or GIF.
I sometimes add the odd irrelevant pic in there to see if anyone is paying attention.
Pretty sure TZ go his ear tugged for studying one about TZ750 intake diffusers.

Did you read the PDF? I had never heard of the Kiwi one.
As for the piston revolutions, The earth as far as I know still does a full revolution every 24 hours or so.
Sneaky I know.

"I stand corrected; you can have my ice cream, Ken"

i think maybe the ice creams already spoken for pete....

[Larry Wiechman]

It's hard for me to believe the combustion process enjoys square corners.

[Grumph]

It's hard for me to believe the combustion process enjoys square corners.

It's hard for me to believe anyone took that motor seriously...
In about 2002 I went in the wrong door at Mace engineering in ChCh, looking for someone. Lo and behold there was my old race opponent, Paul Mclauchlan playing with some kind of motor. He was kind enough to show me what he was doing - the Pivotal.

Pretty sure nothing has been done on the project for some years now. Post quakes, Mace is still standing and functioning but their core business has gone crazy. They are specialists in repair of large engines - from earthmoving diesels to marine prime movers.

Bill Mace I'm confident was in it for the potential concept sales and licence fees. A short time before Paul approached them, another ChCh identity Ricky Main had gone public in Australia with his Geneva wheel motor - and it was apparent he'd pulled in the cash big time...Sadly for Bill, it doesn't seem to have happened here.

[wobbly]

Square corners isnt really an issue - the rotary that powers your vanilla RX7 has had them forever, and that seal is reliable.
What was ,and still is the issue, as is the case with so many of these ideas, is that although the "different " technology may in fact
be an advantage that could be used in a certain application,completely ignoring what is accepted port STA for that application hamstrings the
project at the outset.
If the designers couldn't design a normal 2T correctly, what chance has the new variant got in reality.

[Martin1981]

Frits is a Ryger Guy now


Frits, did you have the Ryger Technology in your head already some time ago? if so, did you expect it to work in real? if not, why not?