What's This Called

[Ken I]

What is the name of this type of engine.

I've looked on the net and the nearest I can find is Comber - but I don't think that's it.
I'm busy making something along these lines and will post plans etc. when completed.
But I'd like to get the name right.
Regards, Ken

 

[larryg]

I have no idea of the name but it is neat and would make Rube Goldberg proud.

lg
no neat sig line

 

[kvom]

Not a comber, where the cylinder spins completely. This looks like one of the multiplicity of oscillators.

 

[deverett]

Bill Reichart describes his design as a Gyro Engine.
https://www.billreichart.com/gyro-engine
The plans were modified by Ernie Weinberg and he calls his simply Ernie's Easi-Spin.

Dave
The Emerald Isle

 

[Ken I]

O.K. - This is what I'm building :-

The cylinder rotates within the main flywheel (on a different centre) it is 16mm bore x 30mm stroke.
The main flywheel rotates in a cradle of ball bearings and held into that cradle by a pair of inclined ball bearings - running at 45° - the middle of the flywheel is thence a void.
There is a smaller auxiliary takeoff flywheel running on the cylinder axle.
kvom - the cylinder spins completely - it's not an oscillator.
The drawing is horribly busy with all the details on - I'll post more as it progresses.

I'm about half way through the build - but I still need a name for it. Any suggestions ?

Regards, Ken

 

[johnmcc69]

Very cool!
Looking forward to some more!

John

 

[Ken I]

Here's the primary flywheel - machined from a CI castor wheel - Brass piston rod clevis is mounted.

Regards - Ken

 

[Peter Twissell]

Mad as a box of frogs - I like it!

 

[fcheslop]

Some good animations on this site including the rotary cylinder engine
Im on building a Ringbom engine version.Well Im onto Mark2
Animated Engines - Home

 

[Ken I]

fcheslop - thanks for the link - useful.
O.K. So a "Box Of Frogs Rotary Cylinder Engine" it is !
Good luck with the Ringbom.
I just recently completed the Jonkman 60 Stirling

Here it is standing next to my elbow engine.
I like it because I can run it on the bar - I modified the burner to run on alcohol.
Regards, Ken

 

[fcheslop]

Hi Ken, good luck with the build
Im basing the Ringbom on one Iv already made designed by Renee Schaffer the spelling maybe wrong but you can see it here. Iv also recieved some info from Huib Vissor so with a bit of luck it should run this time

 

[mirek111]

The cylinder rotates within the main flywheel (on a different centre) it is 16mm bore x 30mm stroke.

I like it damn well

 

[vederstein]

I've seem videos of similar engines. I believe it's a type of oscilator that would have been used on a small marine vessel. (But then I could be completely wrong.

...Ved,

 

[Ken I]

Here's the cylinder assembly :-

Note transfer pipes from distributor axle to cylinder heads.

The distributor axle was a SOB to make - but no scrap thus far. For scale that's an M6 thread.
The anulus grooves provide the inlet/exhaust timing.

This is mostly going to be hidden in a wooden barrel "insulator" with hoops.

Regards, Ken

 

[Ken I]

O.K. it's finished and it runs.

Still got to make a base.

Will do a build log and post video, plans & more in due course.

I still don't have a name for it.

Otherwise I'm calling it a "Crankless Rotary Cylinder Engine".

Any suggestions for a name ?

Regards, Ken

 

[johnmcc69]

Great job! Looking forward to seeing it run!
I think the lagging on the cylinder adds the perfect touch.

John

 

[Cogsy]

That is a very impressive looking engine, I'm eager for the video too. Looks very steam-punk-ish to me (which I very much enjoy).

 

[stanstocker]

Crankless Rotary Cylinder Engine - how about CiRClE? Probably more an indicator of my years playing acronym soup around the DC area than a decent name, but sort of descriptive / self referential.

Heck of a fine looking engine no matter what it's called! Did you need to play around with the piston mass to avoid vibration as the rod/piston/rod end mass moves around or is the flywheel massive enough that the variation of mass position during rotation just doesn't have much effect?

Thanks, Stan

 

[Ken I]

As you spotted only the piston / rod / clevis are the only things out of balance and while it does generate some vibration it does not appear significant.
I could add mass to the opposite side of the primary flywheel (crankwheel ?) which would counter some (but not all) of the out of balance forces.
It seems to smooth out with more revs which leads me to conclude that much of the vibration is due to the cyclic nature of the applied torque rather than mass issues.
Regards, Ken

 

[JohnBDownunder]

Congratulations,
I reckon it looks great plus I too want to see it running. Video soon, Pretty please Sir Ken!