ESE's works engine tuner

[WilDun]

The square piston is so 1970's

Yes Husa, a 'windup' was really all I could have expected!! - at least I tried and I'm sure Luc will already be back on the drawing board feverishly working on the modifications!

[Pursang]

The square piston is so 1970's

And This is a Bad Thing?... because???:

[lucf]

The way you put it makes it sound like the max RPM can't be limited with the ignition. Am I right? Very interesting if that's true.

Right, its not allowed to change ignition !

Yes Husa, a 'windup' was really all I could have expected!! - at least I tried and I'm sure Luc will already be back on the drawing board feverishly working on the modifications!

No reason to change anything !

[Michael Moore]

I don't know when Jeff Henise will get time to reduce the size and post some photos of his killer TZ350 engine project (wobbly guided him on the design) here or on his highwaymanbikes.com website but those of you on FB can see some there

https://www.facebook.com/jhenise/pos...55500252306228

I've attached a sample photo.

cheers,
Michael

[Jannem]

70 hp without being dependent on the pipe?
Verzonden vanaf mijn iPhone met Tapatalk

Supersonic exhaust port.

[Flettner]

Yes Neil, we tried several portangles.
We still can change to the old concept of 70hp at 17.500rpm and max rpm of 30k.
But we don't want to sell an engine which runs to easy to 30k.
That we will leave that to anyone who want it.
This is the current Ryger https://www.youtube.com/watch?v=RJbxxdzhESA

So Luc you are saying there are two Ryger engine designs?
The new one is not just a de rated version of the original?

[2T Institute]

Yes Neil, we tried several portangles.
We still can change to the old concept of 70hp at 17.500rpm and max rpm of 30k.
But we don't want to sell an engine which runs to easy to 30k.
That we will leave that to anyone who want it.
This is the current Ryger https://www.youtube.com/watch?v=RJbxxdzhESA

Looks about as fast as a Clubman J motor

[jasonu]

Looks about as fast as a Clubman J motor

Any 2 stroke put up against a bunch of lawn mower engines will always look good.....

[Flettner]

The Ryger engine answer must lie in the free piston engine. How do these engines oscillate to such high frequencies with no where near enough blow down time area. Not pipe dependent AND I would image they would be a form of HCCI once up and running under load ??
I don't know enough about these engines apart from a few articles I've read over the years, but I understand they have a similar high pressure transfer system.
Husa will find pictures I imagine. (I hope)

https://youtu.be/OVWZFdb_AGc
http://www.google.com/patents/US8127544

[Jannem]

Supersonic exhaust port.

1. Not in the patent, as sonic nozzle is not patentable.
2. Small entry area-> longer effective working stroke.
3. Pressure ratio is there
4. Shapes common knowledge
5. Flow speed at contraction mach1, but mass flow increases. No blowdown issue.
6. Extracts heat from exhaust to accelerate flow. -> efficiency & no heat problems from exhaust. Can run it lean,
7. Eliminates reversion, making it insensitive to the pipe.
8. Requires an intake system that is separated from exhaust and can deliver.

Sounds exotic, but proven technology with no foil hats required.

Now, where is the flame suit.

[Flettner]

1. Not in the patent, as sonic nozzle is not patentable.
2. Small entry area-> longer effective working stroke.
3. Pressure ratio is there
4. Shapes common knowledge
5. Flow speed at contraction mach1, but mass flow increases. No blowdown issue.
6. Extracts heat from exhaust to accelerate flow. -> efficiency & no heat problems from exhaust.
7. Eliminates reversion, making it insensitive to the pipe.
8. Requires an intake system that is separated from exhaust and can deliver.

Sounds exotic, but proven technology with no foil hats required.

Now, where is the flame suit.

some examples?

[Jannem]

some examples?

Free design calculators all over the google. Area ratio defines exit velocity and shape is important not to have shock waves in the nozzle.

In the 4-stroke world an engine builder (who had worked for Lockheed-Martin) claimed to have used that approach (among others) in the Bob Glidden's engines for unbeatable row of pro-stock victories. Got a lot of suspicion from experts for that claim:

http://theoldone.com/boss429head/index.html

Saw years ago his design for an updated port, with 1.6" ex.valve for pro-stock engine. Might still have it somewhere on my computer...

Of course, anyone can claim anything over the internet, but what would be the reasons based in physics why it wouldn't work? It's been utilized in the aircrafts forever. Of course not applicable in the traditional 2-stroke with connected intake and exhaust.

edit: For the efficiency side, in addition of being able to run it lean without heat issues, the inertia from exhaust will pull a vacuum in the cylinder for reduced pumping losses.

[lucf]

Supersonic exhaust port.

Yes necessary in a normal twostroke, but Ryger is not a normal 2 stroke !

So Luc you are saying there are two Ryger engine designs?
The new one is not just a de rated version of the original?

If you have read it well than you know why it has to be changed last year.
Every user can change it back to 30k, but at his own risc.
Beside there will be like in a normal 2 stroke much more to change, but that we leave for the experts.
The homoligation has not been changed and ofcourse no HCCI

Looks about as fast as a Clubman J motor

If you are experienced enough, than you can eliminated what is not important.
https://www.youtube.com/watch?v=RJbxxdzhESA

[husaberg]

The Ryger engine answer must lie in the free piston engine. How do these engines oscillate to such high frequencies with no where near enough blow down time area. Not pipe dependent AND I would image they would be a form of HCCI once up and running under load ??
I don't know enough about these engines apart from a few articles I've read over the years, but I understand they have a similar high pressure transfer system.
Husa will find pictures I imagine. (I hope)

https://youtu.be/OVWZFdb_AGc
http://www.google.com/patents/US8127544

?

[Jannem]

Yes necessary in a normal twostroke, but Ryger is not a normal 2 stroke !

Nope, normal two stroke wouldn't work with supersonic port, because you would lose pulsing and extract intake charge to the pipe, without any way to return it. Close to sonic, yes.

Or maybe it could work timed right, but without the pipe supercharging effect. So, if you are not doing it, maybe you should give it a thought.