Rusty,
I’m glad
to hear you on line. At least
someone in Florida apparently came through the storm OK. I assume since we haven’t heard from
John or Bulent for awhile, that they are without power.
I also wonder
if they know about the other hurricane that is headed their way.
On your
temperature issue, I’ve been fighting a similar issue on my new cooling set
up. What I’ve discovered is that
my evaporator cores are not allowing coolant to flow evenly through them. At least at lower power levels. Only the top ¼ is getting hot.
Originally
there were tubes on one side that extended down into the side tank to force the
coolant (freon originally) down to the bottom of the core. When I drilled out the cores to install
the AN-16 bungs, those tubes went away along with the top plate material.
Now, I
have some ¾” aluminum tubing on order, and I’m going to drill big holes in the
bottom 2”, and insert it into the core to perform the same function.
I also had
a devil of a time getting the air to bleed out. It would circulate coolant when it was parked on its nose,
but not when upright when I would taxi.
That drove me nuts (not a long trip anyways).
You might
want to check to see that you are using the entire core for ground cooling, and
not just 1/4th of it, like I am.
Regards,
Steve Brooks
-----Original
Message-----
From: Rotary motors in aircraft
[mailto:flyrotary@lancaironline.net]On Behalf
Of Russell Duffy
Sent: Sunday, September 05, 2004
10:26 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Rev 3.1
static tests
Greetings,
Well,
my week of fiberglass hell seems to have paid off. As you may recall, I
got 5500 rpm with my old inlet ducting, 5700 with the ducting removed, 5820
with the ducting removed, and short air horns on the TB. Today, with all
the new inlet installed, I got 6000 static. I'm pretty happy about
this. Tracy reported 6200 at 120-130mph in climb, and I'm sure I can top
that now.
I only
saw 27 MAP at full throttle static though, but I can't say I ever tried this
when I thought all was well (and was NA). Has anyone tied their plane
down, and run full throttle to see what the MAP actually reads? 27 still
sounds low, but I just don't think it can be improved in the current
configuration, and may just be a reporting error from the way the ports are
mounted in the TB.
The
downside to all this success is cooling.
I used to be able to run on the ground for minutes at full throttle without
overheating. Not anymore. I exceed 200 in seconds at full
throttle, and I saw a max of about 220 degrees for both water and oil during my
brief-as-possible runs today. The
water might be OK on climb with some airflow, but the oil is going to overheat
quickly. It doesn’t make sense to
have more power, and not be able to use it, so I’m sure my next big project is
to improve the oil cooling.
Fortunately,
after next weekend, I'll have a SlingShot to fly, while I fiddle with the RV-3
for the rest of my life :-)
Cheers,
Rusty
(one solution, leads to a new problem)