> > > > billdunn wrote:
 > > > >
 > > > > Any ideas on the rand cam ?
 > > > >

bd

Large displace for its diameter. It was originally designed as a torpedo

engine. It's Achilles heel is the line contact between the piston roller

and the wobble plate.

Paul Lamar

DeBoer wrote:

 Are you sure you are not refering to the DynaCam?  Which is accually
 certified by the way.  -  Norm

Right Norm! Sorry. Brain fade. Yes I remember now. The RAND Cam.
Getting old :)

Here is what I have to say about that. Not to mention
50 years and untold billions invested in the wankel so far.
Snow balls chance in you know where..........

Paul Lamar

As Paul pointed out, all of the cam related engines suffer from the
high local stresses on the cam surfaces. Many of these are inspired
by the thought that added combustion time at TDC is a major
benifit (the infamous Bourke engine being a prime example with
an almost religous following). Any changes from this are miniscule
and the resulting engines are almost always heavier and more
expensive than conventional designs. Vance J

billdunn wrote:

No I wasn't refering to the Dynacam engine. I saw another rotary type engine
on the net. I don't they reference the same engine but I don't know.

bd

Bill,
If you go to Google and search for rand cam, there are two listings. The second
lets you download some info on it. I could not find a web site.

This engine is very different from the Dynacam, in that it is an axial sliding
vane machine where the vanes are sliding axially between two cam surfaces that,
simultaneously, form the combustion chamber. There is one four-cycle operation per
rotation, meaning two complete cams, and six vanes. Working chambers are on both
sides of the dividing wall or disc that rotates and slidingly supports the vanes.

I don't know the status of its development, but I do not think much of it. I
should know, as I had it patented in 1977. P# 4,004,556. They have changed the
side walls from sinusoidal curves to a modified curve with "bumps" in it. Rolf.

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