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Actual, only one.  Do real radials turn with the prop?  On the Caudron I just got for fs, the engine rotates.  It just doesn't seem right to me.

The Caudron you got - probably a WW1 - is not a "radial" per se.

Through WW1, rotary engines were used in which the crankshft was stationary while the engine block rotated around it.  The propeller was bolted directly to the engine block.

Examples were the Gnome, LeRhone, Oberursel and a few others, including the Bristol Rotary (BR) that powered the Sopwith Camel.

Radial engines, while developed in that time, didn't come into the forefront until after the first World War.

In essence, your model is "right".

The rotary engine's torque is what gave the Camel (to name one airplane) it's legendary turning maneouverability - it could turn like a bat in hell to the right, but slightly sluggish to the left......  Rotary engines though had two speeds - full on, or full off, (fuel flow)...  plus the pilots of single seaters probably never suffered from constipation - the l;ubricatin system was a total loss system, and so the exhaust included the spent CASTOR oil...

As an aside, Siemens Schukert developed a contra rotating rotary engine in which the prop spun opposite the engine block.

oh.  I thought that's what it was.  Thanks

ido believe it but i dont.
does this stuf happen in fs?

ido believe it but i dont.
does this stuf happen in fs?

I don't understand the question?  If the question is can rotary engines be animated in FS, of course.  For flightsim modelling purposes they're just another propeller!

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I don't understand the question?

the question isn't really about fs.  It's about the engines in general

"Radial" refers to the geometry of the engine- the cyinders are arranged around the crankshaft like spokes on a wheel (a line between the center and edge of a circle is called a "radius", so...).
Not all radials are rotaries, but all rotaries are radials.
Even a Wankel rotary, but that's a whole 'nother thing...

To avoid confusion, early aero engines with the propeller bolted direct to the engine & the whole caboodle rotating around a fixed crankshaft are referred to as Rotary type. The later & more familiar type with a stationary crankcase & cylinder assembly fixed to the airframe with the prop attached to a rotating crankshaft are called Radials.

[quote]Rotary engines though had two speeds - full on, or full off, (fuel flow)...