Radial Bi Rotary Balanced Piston Combustion Engine

[frankydevaere]

I would like to bring this new engine under attention for discussion.



Wix.com Radial Bi Rotary created by RBRBPCE based on Minimal Shop

http://www.youtube.com/watch?v=1ZqCdNU8MlA

[Allch Chcar]

Weird but I was just thinking about that just two days ago.

[Frank Lee]

I couldn't see anything that explains wth is going on in there

[gone-ot]

...a real-world "working" model yet?

...bet, the constantly moving "center-of-gravity" will rival the gyroscopic problems of the WWI Gnome engines!

[Arragonis]

[QUOTE=Old Tele man;221909...bet, the constantly moving "center-of-gravity" will rival the gyroscopic problems of the WWI Gnome engines![/QUOTE]

Surely only if you are flying ?

And I'm not calling you Shirley

[frankydevaere]

Originally Posted by Old Tele man

...a real-world "working" model yet?

...bet, the constantly moving "center-of-gravity" will rival the gyroscopic problems of the WWI Gnome engines!

Gyroscopic, centrifugal and inertia forces are all three different things.

No, center of gravity stays in place, always on the main center line of the crankshaft. Pistons and conrods are moving symmetrically away and together, balancing inertial forces ( of the first and second order ) and centrifugal forces.

The gyroscopic force ( in case of flying or driving a motorcycle ) of the alu rotor, alu cylinder , torlon bearing houses and steel drive mechanism is not worse or better than of an conventional engine with a flywheel. The rotor is rotating 5 times slower than the crankshaft and has 12 ignitions per revolution. That is five times slower rpm than a "gnome" or a "rhone"

Nevertheless, all the rotating parts are heavier than a wankelrotor but still light and rotates 4 times slower than this wankel ( wankel 3 ignition per revolution )

real working ? , yes a spinning toy ( kind of RC )
this one ? 750 cc i'm working on.

[gone-ot]

• rotational dynamics 101: when the center of a rotating mass moves outward the spinning velocity decreases; while, conversely, when the center of rotating mass moves inward, the spinning velocity increases.

• gyroscopic dynamics 101: a spinning mass will process and attempt to resist directional changes.

[SoobieOut]

Looks like a great idea.
Was wondering about the bearing surfaces and how lubrication is handled.
Seems like a huge metal to metal contact area.

[frankydevaere]

Originally Posted by Old Tele man

• rotational dynamics 101: when the center of a rotating mass moves outward the spinning velocity decreases; while, conversely, when the center of rotating mass moves inward, the spinning velocity increases.

• gyroscopic dynamics 101: a spinning mass will process and attempt to resist directional changes.

the crankshaft and cylinderbank are counter-rotating.

In case of flying with it. Have a look at : Siemens-Halske Sh.III - Wikipedia, the free encyclopedia

"The advantages of the engine were increased propeller efficiency through the reduction gearing effect of having the engine effectively running at 1,800 rpm for only 900 rpm of the airscrew, and excellent high-altitude performance due to the high compression ratio achieved. A bonus was the counter-rotating masses tended to cancel out the gyroscopic forces of the engine. This was achieved by using bevel-gears housed in the rear of the crankcase."

[NeilBlanchard]

I was concentrated so much on the crankshaft and the connecting rods -- I completely missed the static "valves"! This would be a major challenge, would it not? Keeping the seal without excess friction, and all that...