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 [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)

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Frits Overmars

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Nombre de messages : 2007
Age : 69
Localisation : Raalte, Holland
Date d'inscription : 12/10/2010

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Sam 8 Aoû 2015 - 16:15

I'm sorry; I am not yet at liberty to answer specific questions like these, guys.
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desmofr16

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Nombre de messages : 313
Age : 60
Localisation : 16 LA ROCHEFOUCAULD
Date d'inscription : 23/11/2013

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Sam 8 Aoû 2015 - 16:47

ça doit bien être lié à la précompression;
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ambike



Nombre de messages : 56
Localisation : DFW,Texas
Date d'inscription : 15/11/2013

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Sam 8 Aoû 2015 - 16:53

" some things happen in the engine cases "

That's a lot better than some things happening TO the cases !

I say the some things are a type of supercharging.

A rose by any other name & all that.

....and a bit of trickery for the exh port ?
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ktuningteam



Nombre de messages : 38
Localisation : valencia
Date d'inscription : 03/03/2015

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Dim 9 Aoû 2015 - 23:22

as I responded to the facebook photo Ryger engine, the reed valve communicates directly with the transfers from the top of the piston at bottom dead center without going through the crankcase, this tour so short, and short exhaust pipe large diameter, accompanied by low compression engine operated at high rpm. The part that separates the cylinder base, seems to have something to do with the transfer of the crankcase pressures and hence announce 11 transfer duct... that's what I think, maybe this totally wrong!
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Lef16



Nombre de messages : 12
Localisation : Hellas
Date d'inscription : 02/03/2014

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Lun 10 Aoû 2015 - 2:08

What type of stainless steel do you use for making exhaust pipes?
About a year ago I bought a TIG but I couldn't make it work and I gave it up.
My problem was that it was letting very small holes(ivisible for eyes) in the start and ending of every welding.I figured it out when I leak tested...disaster....  
I think because of wrong type,or cause of wrong thickness of the rod,or because of the wrong setting...I couldn't understand.
Cheers
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uniflow



Nombre de messages : 47
Localisation : Eureka
Date d'inscription : 19/01/2013

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Lun 10 Aoû 2015 - 4:45

ktuningteam a écrit:
as I responded to the facebook photo Ryger engine, the reed valve communicates directly with the transfers from the top of the piston at bottom dead center without going through the crankcase, this tour so short, and short exhaust pipe large diameter, accompanied by low compression engine operated at high rpm. The part that separates the cylinder base, seems to have something to do with the transfer of the crankcase pressures and hence announce 11 transfer duct... that's what I think, maybe this totally wrong!

I think you are on the money.
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Dan42



Nombre de messages : 4408
Localisation : Margerie-Chantagret 42
Date d'inscription : 06/04/2014

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Lun 10 Aoû 2015 - 10:23

ridley a écrit:
What is the utility of the tank topped of a filter that we can see near the carburetor?


Oil feeding to lubricate , because the engine don't use mix, only standard fuel ??????
Dan
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hervefaure



Nombre de messages : 128
Age : 70
Localisation : paris
Date d'inscription : 19/12/2013

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Mer 12 Aoû 2015 - 19:03

Some kind of "effect Kadenacy" ???
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Frits Overmars

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Nombre de messages : 2007
Age : 69
Localisation : Raalte, Holland
Date d'inscription : 12/10/2010

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Mer 12 Aoû 2015 - 19:20

hervefaure a écrit:
Some kind of "effect Kadenacy" ???
That effect occurs in every situation where a duct is connecting two vessels with different pressure levels.
It is found in any pulsating flow, so this includes the Ryger engine (and all other two-stroke and four-stroke engines).
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barbazan



Nombre de messages : 42
Age : 55
Localisation : Lyon
Date d'inscription : 18/12/2011

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Jeu 13 Aoû 2015 - 21:31

Hummmmm! Pulsating engine, such as V1 and V2 rocket engines Nazis of the Third Reich.
This is the exhaust system creates a sufficient vacuum for the filling, it requires to operate at the proper frequency.
But starting the engine must be difficult .....
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hervefaure



Nombre de messages : 128
Age : 70
Localisation : paris
Date d'inscription : 19/12/2013

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Jeu 13 Aoû 2015 - 22:50

Je pensai effectivement à ce genre de dispositif, tel le dessin de Kadenacy ci dessous..

[Vous devez être inscrit et connecté pour voir ce lien]

PS Les V1 étaient bien des pulso reacteurs pas les V2 qui avaient des moteurs fusées
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Adam Armstrong



Nombre de messages : 11
Localisation : Newcastle upon Tyne
Date d'inscription : 31/01/2013

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Ven 14 Aoû 2015 - 15:57

Hi Frits, do you know when the Ryger motor will be available?
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Frits Overmars

avatar

Nombre de messages : 2007
Age : 69
Localisation : Raalte, Holland
Date d'inscription : 12/10/2010

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Ven 14 Aoû 2015 - 16:14

Adam Armstrong a écrit:
Hi Frits, do you know when the Ryger motor will be available?
As I keep saying, I try to stay away from commercial matters as much as I can, but to the best of my knowledge the Ryger kart engines are for sale right now. Try [Vous devez être inscrit et connecté pour voir ce lien] or [Vous devez être inscrit et connecté pour voir ce lien].
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Frits Overmars

avatar

Nombre de messages : 2007
Age : 69
Localisation : Raalte, Holland
Date d'inscription : 12/10/2010

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Lun 17 Aoû 2015 - 13:35

I just received the following email, to be made public:
==========================================
Dear (two-stroke) friends,

Thank you for all the attention you have given the Ryger engine.
My name is Harry and I have been working on two-strokes for about 45 years now.
Back in the year 2000 I was convinced that a clean two-stroke would be possible and I started thinking .. five years before the idea was finally there in the middle of the night, April 2005.
Then it all started… It took me 10 years of development and it was not much of an easy ride.
Nobody believed at first and there I was.. alone with some bits and pieces building the perfect engine.
Honestly I didn’t expect it was that good, I knew it was clean but the power was a nice present that came along with it !
The reason we introduce the Ryger step by step is simple: it is not meant for the big guys but for everybody.
Upgrading a conventional two stroke must be available to everyone before it is to late because of inescapable new emission regulations.

A few things to think about :
30.000 rpm ? easy….. it could do a lot more. How ? don’t let the piston touch the rings !
Port timing ? …not important !
Crankcase volume ? not important !

At last a big thank you to my dear friends Frits, Luc, Thijs and the lot from the Ryger team !

P.S. now and then I answer some questions but within my limitations, on my facebook via pm…Mcd Twist Ryger Engine.

Kind regards
Harry Ryger
=================================================
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Dan42



Nombre de messages : 4408
Localisation : Margerie-Chantagret 42
Date d'inscription : 06/04/2014

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Lun 17 Aoû 2015 - 18:49

30000rpm for a single cylinder 125cc with 54 bore and stroke ????? incredible scratch
Dan
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Paul Gane



Nombre de messages : 14
Age : 58
Localisation : London, England
Date d'inscription : 07/03/2013

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Lun 17 Aoû 2015 - 19:57

How about a Ryger 250, or even a 500
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ktuningteam



Nombre de messages : 38
Localisation : valencia
Date d'inscription : 03/03/2015

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Lun 17 Aoû 2015 - 22:25

A v4 500 Ryger with 280cv to 30000rpm ... anyone can imagine who could drive this?
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Phytus

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Nombre de messages : 636
Localisation : Monségur
Date d'inscription : 22/06/2012

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Mar 18 Aoû 2015 - 10:51

Stoner should back for less ...
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http://phytus.skyrock.com/
Sabijator

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Nombre de messages : 12
Age : 34
Localisation : Croatia, Trogir
Date d'inscription : 01/07/2011

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Mer 19 Aoû 2015 - 6:01

Interesting design, congratulations  

Probably those 30 000 rpm that are mentioned are possible for this type of engine but in multi cylinder or smaller capacity 50, 70 cc ? As they say 125 engine has max power at 17500 rpm which is ok for 54 mm stroke.

What is minimum working idle speed of this engine, is it posible that it is not below 5000 rpm, and is there something more provided to go on the front side of the engine under the intake?
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LucF



Nombre de messages : 89
Age : 74
Localisation : Pays Bas
Date d'inscription : 25/05/2011

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Ven 21 Aoû 2015 - 17:21

Sabijator a écrit:
Interesting design, congratulations  

Probably those 30 000 rpm that are mentioned are possible for this type of engine but in multi cylinder or smaller capacity 50, 70 cc ? As they say 125 engine has max power at 17500 rpm which is ok for 54 mm stroke.

What is minimum working idle speed of this engine, is it posible that it is not below 5000 rpm, and is there something more provided to go on the front side of the engine under the intake?

The goal is not that 30.000rpm, because the max power is between 17-18k.
But the princple can go far more than 30k that is a typical Ryger property, which is completely different with the current 2t principle we already used for more than 100 years. So today 2stroke laws you can forget for a very big part, with the Ryger engine it starts all over again.
The mechanical construction determine what is the maximum possible. So see that 30k more as a test that the engine can handle it.
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http://www.geocities.ws/lucfoekema/indexNL.html
Dan42



Nombre de messages : 4408
Localisation : Margerie-Chantagret 42
Date d'inscription : 06/04/2014

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Ven 21 Aoû 2015 - 18:34

Some RC car racing engines revs from 30 to 38000 rpm whith the "standard" 2T mode, capacity 3 to 3,5cc with a max power of 1,8 to 2,8 HP. Generally the stroke and bore are around 16mm. Of course, they don't run with standard fuel, but on spécial mix and glow plug ignition.
Dan
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LucF



Nombre de messages : 89
Age : 74
Localisation : Pays Bas
Date d'inscription : 25/05/2011

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Ven 21 Aoû 2015 - 19:15

Dan42 a écrit:
Some RC car racing engines revs from 30 to 38000 rpm whith the "standard" 2T mode, capacity 3 to 3,5cc with a max power of 1,8 to 2,8 HP. Generally the stroke and bore are around 16mm. Of course, they don't run with standard fuel, but on spécial mix and glow plug ignition.
Dan

Yes Dan, thats normal for that kind of engines. We also did have racing with them. In comparison with 13k for the RSA, 3,5cc should run over 42k. Have a look at this: HP-CC-comparison for a current 2stroke engine for the Ryger it will be far different.  https://www.facebook.com/notes/luc-foekema/hp-cc-comparison/4063702169994
[Vous devez être inscrit et connecté pour voir cette image]


Dernière édition par LucF le Sam 22 Aoû 2015 - 15:23, édité 1 fois
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Dan42



Nombre de messages : 4408
Localisation : Margerie-Chantagret 42
Date d'inscription : 06/04/2014

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Sam 22 Aoû 2015 - 11:44

Do we can consider that the "Ryger Design" is a revolution like Schnurle, Zimmerman and Kaaden developments ? a very mysterious engine
Dan
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yesyes



Nombre de messages : 27
Localisation : nancy
Date d'inscription : 25/06/2014

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Sam 22 Aoû 2015 - 13:52

Frits OVERMARS wrote
The reason we introduce the Ryger step by step is simple: it is not meant for the big guys but for everybody.
Upgrading a conventional two stroke must be available to everyone before it is to late because of inescapable new emission regulations.

That definitely sounds like a Revolution for 2stroke lovers and a finger given to the world company.
Mind the step !
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LucF



Nombre de messages : 89
Age : 74
Localisation : Pays Bas
Date d'inscription : 25/05/2011

MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   Dim 23 Aoû 2015 - 1:29

Yesyes, Yes
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MessageSujet: Re: [GP125] All that you wanted to know on Aprilia RSA 125, and more, by Mr Jan Thiel and Mr Frits Overmars (PART 4)   

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