The trick is different adapters from the oval shaped or double
circle ports to round tubes. Fortunately help is on the way.
Rhino has a command called "unroll developed surfaces" that generates
a pattern that is then cut out of soft .063 6061-O and rolled up
and welded along the seam. That gives you an adapter that can then
be shaped into what you need without any stretching of metal.

Paul Lamar

Paul -

I have long thought that simple intake adapters for the various rotary
engines were the way to go.  The adapters would have a flange at each
end - one bolts to the engine and another bolts to the round intake pipe
flange.

My concern was the number of variations required:
        1) Multiple rotary engines
        2) Multiple intake pipe diameters
        3) Multiple intake configurations
                a) Separate pri & sec runners
                b) Combined pri & sec runners
        4) Multiple porting variations
        5) Multiple angle adaptations
                a) straight through
                b) built in 90 degree turn

Once these adapters became available, we could simply weld flanges to
the intake runners and bolt everything together.  It should make for a
very light induction system.

I think this is worth pursuing.  I'd be more interested in these
adapters than your previous manifold casting.  (Good job, by the way.)

I'd vote for a straight through combined pri & sec into a single runner
of the same intake area (2"?).  This would be the simplest for the
builder.

Ideas?

--
Thanks,
-Vince Orton

I have a pattern already for the second gen four port. Maybe I will get a bunch cast up.

Paul Lamar

It is right in here where most people run into fabrications problems.
You can't just squash the pipe flat. The area becomes less than the round
part of the pipe.

Yes the intake manifold flange is not shown.

Paul Lamar

I was kind of curious what a straight manifold would look like. Not likely
to fit in the average Long EZ. Might fit in the wing of a twin with partially
buried engines. The firewall is only 24 inches in diameter. No cooling rads or
muffler.

Paul Lamar
 
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