[2stroke] Ryger engine

Dan42 a écrit:

Does a video whith a Ryger engine in running conditions exist?
Dan

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I've seen a video of that ride somewhere, but can't seem to find it.

JanBros a écrit:

Dan42 a écrit:

Does a video whith a Ryger engine in running conditions exist?
Dan

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I've seen a video of that ride somewhere, but can't seem to find it.

I don't like to register on this forum, thanks for the information.
Dan

Dan, at the top of the page you were speculating about those cast bulges on either side of the Ryger exhaust. You were wondering if they were auxiliary exhaust ports, or merely water jacketing. Phytus then reminded us that the tech sheet says there is only one exhaust port. I'm curious about those bulges, too. Somewhere during all of this fun speculation, Frits alluded to the spacer-plate under the cylinder as a spacer/VALVE-plate (my emphasis); at least, I think I have that right. If so  .  .  .  valve(s) for WHAT? My first guess was that since those cast bulges on the cylinder appear to possibly overlap part of the spacer/valve-plate, maybe they house an extra set of transfer passages. But now I'm thinking that maybe they actually ARE exhaust ports, but instead of auxiliary ports exiting the cylinder, I'm guessing they are passages from the exhaust stub that are for EGR, which I understand is commonly employed in HCCI experiments for controlling the burn, for tuning. Now .  .  . how? And IS there a connection between the spacer/valve-plate and whatever is beneath those bulges?  What a puzzle, what a lot of fun we're getting out of this waiting period thanks to Mr Ryger (and the kart association officials)!!

(Typical culturally-ignorant Yank, I don't read French, and apologize if someone has already said all of this).

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A similar design whith a "steam machine" piston look
Dan

Dan42 a écrit:

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A similar design whith a "steam machine" piston look
Dan

That's a CITS sketch from 2012

Here's a recent animation of their V twin:

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Dan42 a écrit:

JanBros a écrit:

Dan42 a écrit:

Does a video whith a Ryger engine in running conditions exist?
Dan

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I've seen a video of that ride somewhere, but can't seem to find it.

I don't like to register on this forum, thanks for the information.
Dan

it's worth it though. That topic is like this one, but like 10 times bigger. Frits posts there to and there is lots and lots more info. About the Ryger, there must be about 50 pages talking about it, with some weird ideas about it

anyway : this is what Frits said in may about his first ride in a Ryger kart :

Took the Ryger-kart for a little spin today.
God Almighty!
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!

Kiwibiker forums is very interesting as well, with the difference that everything is mixed in the same topic, impossible to follow! What a mess !!!
Alas on Pit-Lane, the same thing is happening now in this topic dedicated to the Aprilia RSA 125.
It is urgent to create a special topic on Ryger engine if you do not want Pit-Lane become another kiwibiker.

Fpayart,
You're right though, as a contributor to kiwibiker, I have seen many intelligent contributions on  the Ryger. However you are correct, it is mixed with many other topics so would be very hard to follow, especially if one was trying to catch up from when it all publicly started in May. Can't blame kiwibiker for that, it's a new ballgame. Frits has been contributing on kiwibiker, just as he has been on deracehelden and twostroketech (and others?), but clearly his hands are tied.
53 days to go.

Instead of talking about crazy ideas and imaginary powers, why do not we talk about the RSA and real engines with high specific power?

Luca, exactly, that's why we're talking about the Ryger. I don't know, the same as many don't know, whether it is real or not, but with very creditable people such as Frits supporting it, it is very hard to not ignore. The benefit is that we exercise the brain to think about how we can do it differently and better. If it's a goer, then many will be affected.

this topic isn't about the RSA anymore for a long time, just as the ESE topic isn't about a bucket alone anymore. both turned into general topics about 2-sroke tuning in general. You can see this as a pitty, but I think one should embrace them, especialy the fact that people with far more knowledge take the time (lot's of time in the case of some) to share it with anybody.

Totally agree with you, but do why not so in a separate section.
Would not that for any future research.
A little rigor can not do any harm.

Respect!

Dan42 a écrit:

I understand that piston has 2 rings ( one on the upper piston part and one on the lower skirt) and 2 lubricating grooves on each piston parts ( oil distributors). Concerning the 11 tranferts it seems there are 8 in the main base flange ( controled by ring valves) and probably 3 in the cylinder ( 8+3=11).
The exhaust port appears in very high location in the cylinder, but the drawings are certainely not at the good scale. This good subject will be in a better Post: "a better two stroke" yes or not?
Dan  

fpayart +1, I also suggested that .
Dan

Il n'y a plus que janpol84 qui peut nous arranger ça.
Parce qu'il y a du taf maintenant !
Janpol est demandé au parloir.

Ken Seeber a écrit:

Fpayart,

53 days to go.

Does it mean we are supposed to get all we are looking for on the first of january 216 ?
I have never read anything from mister Frits concerning this information ; on the contrary, I remember having read, it could take years before getting it.

The 53 days to go is based on the fact that the Ryger will, or could, be on sale from Jan 1, as part of the new 3 year CIK homologation period. That's all dependent though, on the CIK accepting the technology and its possible ramifications. If it is accepted, then the homologation documentation would be publicly accessible, possibly even earlier than Jan 1.
48 days to go.

if your relatives don't know what to give you for christmas this year, you can give them this ebay-link :

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There you go Howard

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Best Regards

Ian

Well-made, with a very good cooled exhaust duct.
I like them a lot!

Thank you Jan

That is praise indeed coming from the "Maestro"

The 11 cylinders at the top are conventional castings, the one on the engine was our prototype which was 3D printed using the DMLS technique in GAlSi9 and is still running fine after 2 years of racing use.

Best Regards

Ian

Hi Jan, carburation question please:

Did you ever try a Keihin SPJ carb on the RSW/A? I have performed various bench tests on both carbs and can match fuel flow reasonably well for both.

I am tempted to try the Keihin on my RSW, but I worry that it won't have the sensitivity of the Dellorto in the midrange fuel delivery circuit. I know that the Aprilia engine is very sensitive to fueling in the midrange. Is this a function of the engine design (disc valve timing) or the Dellorto VHSD/G carburettor?

Thanks,

Paul.

No, we never tried a Keihin.
Strictly forbidden.
But I would have liked to try one!
The very long inlet timing made carburation very difficult indeed.
But we used a Keihin powerjet.
Without it the Dell'Orto did not work.....

Thanks Jan.

Did you ever run different disc valve timing to suit different circuits? Did you ever close the valve a few degrees earlier to make the power smoother at places like Sachsenring where you are on the edge of the tyre for most of the lap?

Paul

I think this was done sometimes Paul, but I don't know much about this.
I never went to the races, my job was developing the engines on the dyno.
After many years of travelling I did'nt want to go anymore to the races!

Jan, If I were to grind some discs to change the timing, what (from your experience) should I try without restricting the engine too much? 5 to 10 degrees off the closing? I could sacrifice a couple of HP at the top for an easier jetting experience!!