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Tom,
Your on the right track!
Exhaust contamination of the inlet charge,
affects idle ( only) as the exhaust become self evacuating at higher velocity
(RPM).
Cause larger Ports and PP
Backpressure on the inlet charge also affects
idle as the backpressure cause fuel droplets to drop out of suspension, which
causes surging, one inlet charge lean the next rich etc.
Cause larger ports and PP.
The close to housing butterfly, helps to
minimize both, before too much ( of either)
enters the inlet manifold tube.
The RX 8 eliminates the first problem
i.e. overlap. No problem with the second.
PP can cause the second problem.
DI will eliminate both problems!
George ( down under)
Sorry. Ok, it's not the residue that would be a problem, it's the
back pressure in a combined intake system. Tom <tomtugan@yahoo.com> wrote:
That is interesting Ed. Just thinking about it and now it
would seem that the expelled residue would be the first thing that got
sucked back thru a dedicated runner, also having a negative effect.
Ed Anderson <eanderson@carolina.rr.com> wrote:
Tom,
One reason that Jerry would not want to do
that is that there is overlap between intake and exhaust. That means
while one rotor is trying to suck air in its intake port - the intake port
of the other rotor may be expelling some residue exhaust gas out its
intake and opposing any incoming air. I think the engine would
certainly run but I don't think you would develop best power.
Now it would probably be a different story with the Renesis
which by moving the exhaust ports to the side housings has eliminate the
exhaust/intake overlap.
FWIW
Ed A
----- Original Message -----
Sent: Wednesday, February 09, 2005
8:58 PM
Subject: [FlyRotary] Re: P port
intake
Jerry,
Since only one rotor chamber is drawing fuel/air at any given time,
why would you not feed them both from a single throttle body?
George,
originally I was going to hook up with a piece of hose over the
butted pieces with a couple of hose clamps. That is how I will
attach
the other end at the throttle bodies. But, we have been
considering
welding and also building some type of flange.
Certainly, for starters
I will use the hose and clamp method.
Jerry
On Wednesday, February 9, 2005, at 08:43
PM, George Lendich wrote:
> Jerry,
> Is that a but
weld, OR does the tube go into the bellmouth end OR a
> flange that they both go into.
> George ( down
under)
>
> ----- Original Message -----
>
From: Jerry Hey
> To: Rotary motors in aircraft
> Sent:
Thursday, February 10, 2005 9:35 AM
> Subject: [FlyRotary] Re: P
port intake
>
> Yes, it is 1.61
inches.
>
>
> On Wednesday, February 9, 2005, at
05:39 PM, Tom wrote:
>
> Jerry,
> Do you have an
i.d. measurement for the narrow end?
>
>
TIA
> Tom
>
> Jerry Hey
wrote:
>
> Today UPS brought the
bell mouths for the P port intake. They are
> three inches o.d.
across and have a smooth gradual taper down to the
> runner size
...
>
>
>
>
>
>
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