ESE's works engine tuner

[JanBros]

couldn't sleep last night so the Ryger popped up in my head again.

so let's presume it has a rod that goes only up and down, has no piston rings and can be put on any excisting botom-end.
mixture probably does not go through the crankcase, but even if it did, as it is very clean obvious no oil is burnt in the process so no oil in the mixture.
how the hell do you lubricate a crank spinning at 30.000rpm's ?
I supose one could use sealed bearrings for the crank itself, but that still leaves the big-end bearring and whatever bearrings nescesary for the conversion of rotating into up/down movement.

anybody idea's how to solve this ?

[F5 Dave]

looks like this one https://www.google.com/search?q=Malo...RWZoDu09ITM%3A

What does MHR stand for?

[sonic_v]

What does MHR stand for?

Malossi Hyper Racing

[breezy]

[QUOTE=chrisc;1130892655]"Don't let the piston touch the rings"


didnt the message say if you wanted to go " above 30.000 rpm dont let the piston touch the rings" ...
seems to me their is some piston to ring contact at the 30,000 rpm quoted.


inside out piston rings recessed into the cylinder sleeve and pressure placed on them from behind through small bleed holes just like wobbly explained about a piston mod. maybe the bleed holes come from a link to holes above the rings and the pressure forcing them out from the fuel being compressed as the piston moves up the bore. only when the returning wave from the exhaust has stuffed back fuel from the exhaust port would you need a good seal around the piston as with the conventional 2 stroke. maybe the piston has a small taper at the fop to ease the piston through the ring.

[Frits Overmars]

Tell him to clear out the cookies in his browser and try again. What's his login name?

He did, tried again, and got this reaction:

ryger, you do not have permission to access this page. This could be due to one of several reasons:

1. Your user account may not have sufficient privileges to access this page. Are you trying to edit someone else's post, access administrative features or some other privileged system?
2. If you are trying to post, the administrator may have disabled your account, or it may be awaiting activation.

Log Out Home

[Mental Trousers]

Tell him to clear out the cookies in his browser and try again. What's his login name?

He did, tried again, and got this reaction:

ryger, you do not have permission to access this page. This could be due to one of several reasons:

1. Your user account may not have sufficient privileges to access this page. Are you trying to edit someone else's post, access administrative features or some other privileged system?
2. If you are trying to post, the administrator may have disabled your account, or it may be awaiting activation.

Log Out Home

Bumped him up to a different user group. Try again.

[wobbly]

In the days of ELF 124 leaded race gas the norm was 19:1 com ratio.
The MITS unleaded race gas used after lead was banned isnt your "normal" fuel at all, needing rubber gloves
and a respirator to mix and pour into the tank, so much for the "green" approach.
But as Frits says this stuff is good for mid 15 coms.
Your average LL100 avgas is good for 16 as long as attention is payed to chamber and plug cooling.

[Flettner]

couldn't sleep last night so the Ryger popped up in my head again.

so let's presume it has a rod that goes only up and down, has no piston rings and can be put on any excisting botom-end.
mixture probably does not go through the crankcase, but even if it did, as it is very clean obvious no oil is burnt in the process so no oil in the mixture.
how the hell do you lubricate a crank spinning at 30.000rpm's ?
I supose one could use sealed bearrings for the crank itself, but that still leaves the big-end bearring and whatever bearrings nescesary for the conversion of rotating into up/down movement.

anybody idea's how to solve this ?

Connecting rod connects to the "large valve guide" mounted in the plate. This seals off bottom from top. Bottom is now free to have it's case machined out to accept gearbox oil, splash feed. 30,000 rpm with a standard rod? not so sure about that.

[lodgernz]

Connecting rod connects to the "large valve guide" mounted in the plate. This seals off bottom from top. Bottom is now free to have it's case machined out to accept gearbox oil, splash feed. 30,000 rpm with a standard rod? not so sure about that.

Could be dry or wet sump with oil pump like foul strokes. Great. That means 2-strokes will be able to dump oil all over the race track too.

[Frits Overmars]

Could be dry or wet sump with oil pump like foul strokes. Great. That means 2-strokes will be able to dump oil all over the race track too.

Nothing new there. If a foul-stroke dumps its oil, it's usually caused by a con rod taking a look at the outside world.
If a two-stroke con rod snaps, it often penetrates the gearbox, with the same result.

[Grumph]

Nothing new there. If a foul-stroke dumps its oil, it's usually caused by a con rod taking a look at the outside world.
If a two-stroke con rod snaps, it often penetrates the gearbox, with the same result.

Or as Breezy will probably confirm, get too much HP out of a 50's 2 stroke and you exceed the design limits of the gearbox which can do the same thing...

I had a Villiers 3 speed box split the case through the layshaft bearings. Messy - and I had to pick up all the pieces personally.

[ken seeber]

Ken, you might like to know that you gave Harry a good scare! For some reason, although he is logged in, he can't see the pictures here. So he could not see the way you were pulling his leg; all he saw was your disturbing text about another competitor.

Frits, please tell Harry that no scare was intended and to keep up the good work. Just thought he’d be impressed with our port count.

OK fellers, as a spin off from the Random Ryger Research, I did a spreadsheet to understand the possible benefits of dampening the piston inertia as I thought it might be useful to visualize the changes with inputs of: piston mass, piston diameter, stroke, rod length and RPM. Gas forces are based on an SAE paper by QUB that studied a Honda RS125. No allowances for friction etc have been included. Well above my head.

Consider it to be an alpha version, so it might be out be factors of 2, 10 or 100, have a plus instead of a minus etc. However, despite this, it is interesting to observe the forces change as one changes the variables.

As I seemingly couldn't paste it into KB, I have put it into dropbox, as below:

https://www.dropbox.com/s/15d6shlkqr...0815.xlsx?dl=0

[husaberg]

How to search within ESE thread of KB in general


Seriously consider the search words choosen
Also if you know who posted it it will be far far easier.
Click on it three times.
If you don't the kitten dies.

[Flettner]

This was written by Luc F on another forum. Quote;

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.


"Mechanical construction" Guided piston, ringless piston, dampened piston?
Still uses piston, cylinder, petrol, ignition system, carburetor, ports, cylinderhead, much is still the same.
I think the two key areas are the ring (or at least sealing the combustion ) and the guided piston sealing bottom end from top end.
And I'm of the opinion that the trasnfers are high up in the cylinder, higher than normal.
I would imagine 30,000 RPM was what was seen for a split second before it's internals became externals.

[adegnes]

Eleven late opening smallish (for high velocity) transfers are delivering the mixture under extreme pressure from the very high primary compression, forcing the spent gases out. The high primary compression does the needed cushioning. The pipe is no longer the one swinging the bat.

Man I just can't think outside the box...