I have a (very) basic question about rotary engine construction, hoping for some insight.

I'm familiar with rotary engine theory/operation, I've watched rebuild videos, and subscribed to several build threads--but I've never actually taken a rotary apart, or held the components in my hands.

My question is: how do the rotors fit to the lobes on the e-shaft? I assume there is a circular bearing of some kind, but I've not seen this part of a rotor in the sources I've examined.

Sorry for the silly question; can anyone please clarify? Or even point me to some relevant images?

Thanks!

 

It is called a rotor bearing.
Look in some parts manuals,Factory service manuals,or see some videos of Rebuilds.
that will give you an idea as to what is involved inside the engine.
My Favorite "show me what" is videos by AaronCake
try his site Aaron's Homepage Or look up his rebuild videos on YouTube.they are very informative.

 

Aaron Cake's 13B Rebuild Video

Foxed.ca - FREE Factory Service Manuals

Criteria for Replacement of Rotary Engine Parts <- At the bottom. (Bearing clearances.)

 

Triple-R: Engine Rebuild - A First Attempt

Rotor Bearings, Eccentrics, Stationary Gears, Oil Pumps

 

im also new in for more info. thanks

 

Thanks to all for the links to the detailed videos and documents! Much appreciated.

I guess my biggest surprise was that these are fluid bearings; I had just assumed they were ball bearings.

 

When you say "fluid bearing", do you mean plain bearing? Most engines made use the plain bearing design. It's a reliable, simple bearing that offers a larger support area per given space than a ball bearing. Plain bearings are uber reliable if they are lubed with clean oil and the oil pump maintains good flow and pressure.

 

Yes, a plain bearing.

"Fluid bearing" in the sense that a fluid (oil) provides the actual support for the bearing as it rotates.

 

I bought this video Overhaul Video and found it very helpful. Also got Bruce's Second Gen Remove and Replace engine video.