> Hello Paul,
>
> Thanks again for all of this info. Stuff is priceless. I contacted
a
> local rotary head and he is going to let me take one apart with
him
> to
> see all of the little passages and such I cant make out from the
> diagrams. This is getting fun.
>
> My idea is to mate two separate stock rx-8 shafts by sliding each
> end
> into a coupler that is also the gear that connects to the
> transmission.
> I havent decided on the method of
> attachment(splines,keyed,polygon,hirth) yet because I am looking
at
> which end to do it on. I am curious if the e shaft can be flipped
> 180
> and still work correctly in the region between the two lobes. It
> looks
> to be symmetric in that region. Once I have the two keyed sides or
> the
> two tapered sides facing each other I will figure out exactly what
> to
> do. I am leaning toward the straight key side right now because it
> has
> more options to be machined and I would be able to use modified
> balance
> weights.
>
> My second question is on the four rotor engine they commonly talk
> about
> a centralized cooling and oiling system. It is my understanding
that
> they treat the engine as two separate "convective" loops to
control
> the
> temp gradiant across the engine. Is this assumption correct or is
> that
> just BS and they flow coolant and oil from one end all the way to
the
> other.
>
> Rob Woods
>
> Yes that is true. A step towards real parallel cooling.
>
> Paul Lamar ...No rotor no motor.
Paul,
What is the reason for the oil groove in the tapered side of the
shaft?
It looks like the bearings are the same design in both of the
stationary
gear.
By joining the two shafts together on the straight side would most
likely eliminate the oil bleed off valve that is normally there. Do
you
think it would be possible/advisable to mount this to the tapered
side?
Just one side or both?
Rob Woods
I am not following you here.
Load this jpg into MS Paint and mark it up and send it back. The
groove
in the main bearing on the straight end (right side in this picture)
is how the oil gets to the E-shaft from the oil mains gallery
located
on the top of the engine.
Paul Lamar ...No rotor no motor.
Paul,
My mistake. I got my ends swapped. I guess I am confused of how the oil
flows in the engine after it leaves the oil filter. Does it go to the
front main bearing first then through the shaft, distributing to the
rotors and then the rear main bearing or do both main bearings get oiled
at the same time from the upper oil galley and the resulting pressure
bleeds out through the rotor holes and squirting jets?
Parts diagrams show the wex pellet regulator in the end of the e-shaft
on the straight end. If I join the two shafts by the straight ends I
will have to move that device somewhere else. Figure 3.49 and 3.50 on
page 40 of Yamamoto 1981 Rotary Engine book shows an alternative system.
I am curious if this would be as effective.
Rob Woods
Both main bearings get oiled from the upper gallery.
This enlargement should clarify it a bit.
From this diagram it looks like the shaft gallery gets fed
from front and rear mains. That appears (maybe) to be a change from
earlier years. However there is no groove in the rear main. Pic 2
The engine will function without the wax pellet. It is a device
designed to warm the rotors more rapidly for emission reasons.
I would not recommend joining them at the straight ends.
If you build your own end housings you may be able to swap the e-shaft
180 degrees and power the tx from the big ends. Or you could make
your own E-shaft with a bigger front end for one engine.
Fig 3.50 is built into the oil cooler.
If you can get a scanner that would be a big help. I have a $100 all in one
scanner/printer/copier that works well.
Another trick is hit the PrtScr key, load MS Paint and paste. Save as a
jpg and send that. This works well with pdf files.
Paul Lamar ...No rotor no motor.
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