Decker, Michael

these sections show the approximate opening area through the rotor housings
to the oposite side in white all other layers are to scale. The pink
openings are the open areas of the faces of the mazda rotor housings which
in the solid model will be .375 deep into the side housings. The blue shapes
are water passages to the parting line of the cast iron facing of the side
housing which is less than 1" and mostly hollow. the thickness varies by
location used which varies the depth of the blue areas. The parting line
splits at the center of the stock port opening which is rotated up 23
degrees similar to the P-port entry angle which I borrowed from a
conversation wih Paul Lamar as sun-n-fun.The rest of the side housings are
currenly  356-T6 cast aluminum, although I have specs on two suitable
magnesium alloys somewhere in the laptop.

the aluminum part of the side
housings constitute the outer surface of he side housing with  flanged
bellhousing extensions  which connect together to join  the 2 rotor engines.
The interface of all bellhousings fits Tracy Crook'  2.8/1 drive plate.  The
inner face of the aluminum housing has a curved almost bannana shaped
hollow area i  would describe as a manifold shown in purple in the above
snapshot which connects all the blue water transfer passages. The blue
passages force flow across the end housing face(since the opening to the
rotor housing are only .375 deep).


Not in this snapshot are the tension rod
bolt holes, four tie rods through the entire engine stack an a ring of bolts
holding the iron and aluminum side housing sections together. The iron side
housing section has the four motor mount tabs cast in for the thickness of
the iron plate on the accessory end of the last engine. This plate is not
interchangable with the center housing side plate irons because the water
outlets are in the center for a parallel flow cooling(still axial flow
through the individual roto housings).It seems lke a better mounting
location  at the bellhousings that connect the engines, however the intake
and exhaust plumbing make trangulation of the motor mount tubing difficult.


The use of rubber bushings to the engine eliminate the engine from being a
structural member as is done on F1 cars,Top fuel cars etc. The remaining
structure on a four or six rotor  would be tall with a narrow base and a lot
of tube joints behind the accessory case. On my to do list  are two more
mounting bushing locations on the drive end bellhousing which will be
tension/ compression rods back to the top corners of the fusaloge. All six
of the mounting points start out conical in nature. Round wedge shaped
aluminum blocks front and back of the iron tabs will allow aiming the load
vectors at 18, 30,prop, or engine cg. I plan on engine cg . The outer shape
of the part incorporates intake, exhaust,and water manifold flanges and some
concessions to be able to pull the pattern out of the sand for foundary
moulding using a 3 degree draft. Any questions on any other sections? just
slap in image in here.

george grimes