Best done info and explanation I have seen so far.

http://www.eng.ed.ac.uk/~jchick/Y5/thesis/FormulaStudent/public_html/p
t7.htm

Paul Lamar

Good discussion but what a lousy choice of engines to show the effect
of runner length on rpm (first chart on the link)  The D type Jag is
such an inherently low rpm design (drive one and see!) that the effect
of the runner length is mostly masked by basic engine characteristics.
The shorter runners are trying in veign to pull the HP curve upward.
If you tried to used this chart to choose a runner length for your
rotary, it would be a disaster.

In order to clearly see the effect of runner length on HP peak, the
test engine should be one capable of working well at the highest rpm
of interest, not an antique like the D Type Jag : )

Tracy

But of course. It is a piston engine. Poppet valves have their RPM
limitations. Particularly with a long stroke engine like the Jag six. Never
the less it does show trends and that is what I was after here. It also
explains well the interaction of long pipes and a large plenum chamber. It
is the principle and not the application to any particular type of engine we
are interested in here. Intermittent combustion engines suck intermittently
even the rotary.

Perhaps you will like this one better.

http://www.mecc.unipd.it/~cos/DINAMOTO/risuonatore/risuonatore.html

Paul Lamar

-Chuck Chappell wrote:

Paul was the intake manifold pictured with the start of this string your
product?  I would like to get information about it.  If not yours, then who?
I am new to this group and don't' yet know who does what.  I am trying to
put together a resource list for a rotary RV project I am starting.  Any
help appreciated.

Thank you,

Chuck Chappell

We made a batch of castings. I have some left out of the third batch
of manifolds. $175.  The manifolds are machined top and back but no
holes are drilled. Some material will need to be cut away depending 
on the year of the engine.  Intake runners with injector holders and bell mouths
are $50 each. The injector sockets are machined but no other finishing work
is done.  They come in two sizes 2 inch OD and 1.75 inches OD.
Four required per system. We are out of tube bends right at the moment and won't 
do another batch until we have about ten orders. Add $15 per shipping event.

Send check to:
Paul Lamar
830 East Santa Maria St.
Suite #303 <<<<<<<<<<< very important
Santa Paula CA
93060

Paul Lamar
 
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