|
Perhaps one day I will post with good news.
However, today is not the day. I have really been having some fun as I move my
project from "proof of concept mode" to "flight prep mode". The engine and
wires have been my focus since I had to rebuild the strakes in my Velocity
following my Jeffco failure. (BTW, I may have discovered the reason for my
Jeffco failure...more on that later).
Since I have seemingly gotten most my
electrical gremlins tamed as in the engine running, the alternators charging and
lights working properly, I was gonna start to actually hook up my Dynon D-100,
radios, GPS's and audio panel today. I was also gonna take out my EC2 and
EM2 to send to Tracy to check out one last time (my EM2 backlight stopped
working so I figured I would send it all in now while I tied up loose
ends).
Since I was about to send my computers in and would
not be able to run the engine for a while I couldn't resist pushing the plane
out of the hangar and crank her up. She started up as expected. I
taxied around a bit making my "airplane" into a loud and expensive
"go-kart". I shut down after a few minutes as the temps started to
rise.
I let the bird sit for a bit and wanted to restart
it. Hmmm, not starting. Hmmmm. Let is sit a bit more.
Try again. Still no joy. I sat there for a minute and remembered it was a
bit difficult to start a second time the last couple of times I ran the
engine. UHOH! When I had to build this engine it was premised by the
old engine not wanting to start after an initial run. The first engine got
too hot and was leaking coolant into the rotor housings.
I took a big breath and went back to the
exhaust.....there was a bit of dirty liquid at the exhaust tip.
Damn. Ok, take a deeper breath and be a man (no offense Chrissi...I am a
man<g>) and go remove a sparkplug and take a look. Sure enough I
removed the leading plug of rotor two and it had a bit of liquid. I hand
turned the prop and steamy liquid blew out the hole. Damn-it, damn-it
damn-it! Coolant in the housing. Checked the front rotor and same
thing, but less liquid. Damn.
Ok, when this happened to my rebuilt first engine I
blamed myself as I was in a serious learning curve. I ran it hot without a
prop, too hot with a prop and without proper sensors. I really should
have been surprised if I didn't fry it. So, when it failed it gave me an
excuse to buy new housings, end and center plates etc and build what was/is
essentially a new engine. I TOOK EXTREME care as to not to ever let it get
too hot. I would shut it down if it got between 210 and 220. ONE
TIME it got to about 225 degrees before I shut it down and that was only for a
matter of couple of seconds. None the less something has happened to cause
coolant to enter the rotor housings again. I used what were advertised as
"beefed up" O rings purchased from Pineapple racing (kinda as a thanks to
their rotaryengine illustrated website). It is my understanding if that if
the engine gets too hot these "O" rings fail and let coolant seep through.
Oh, I sooooooo hope it is just the "O" rings and the hardware was spared.
All the hardware is new and professionally ported by Mazdatrix to a medium
street port...I really was developing some power.....
I spoke with my engineer friend, Blaine, who owns a
couple of aviation business with R&D as a major factor as well as building a
Soob/Eggenfielder RV-7 and he and I are gonna look into what I
missed. Verify that my sensors are working properly, check the cooling
system for proper flow again among other things. Very frustrating
though. I am, however, getting very good at removing my engine from
the plane. I had it off and sitting on the work table in only about an
hour. I am not gonna crack the engine open yet until I can get Blaine over
for some joint brain duty. On a positive note, there are a number of
things at the "firewall aft" that I need to address, this is giving me the
perfect opportunity to do so. They will be much easier to improve with the
engine off.
Now to resign myself to yet another engine build as
we determine the why.
And, as to another "why". I may have
determined why my Jeffco failed in my fuel strakes. As loyal fans may
remember I had to remove all the old epoxy/Jeffco from my strakes and redo them
completely a couple of months ago due to the Jeffco peeling away. Well, as
I was poking around the hangar looking for something I had placed as to be able
to find it easy later......yeah, right, I came across my old Jeffco
bottles. Hmmmm, the Hardener is labeled 3191 and the Resin is labeled
9700. Now, I remember that when I ordered it a few years ago it was
9700. I remember specifically as when I first ordered from AS&S they
sent the wrong stuff and I returned it for the 9700. THIS time I ordered
new Jeffco, but choose not to use it and just use straight EZpoxy for my
strakes, however, in the new order BOTH the Hardener AND the Resin were
labeled 9700. My current thought is that I used the Hardener that AS&S
supplied with the kit assuming (yeah, bad Chris for assuming) that it was the
correct one to use with the 9700 Resin....which is what I knew to be the proper
number. It was not until the new order arrived a few months ago and I saw
both the hardener and resin are both 9700 and finding the original bottles from
a few years ago that I would have ever discovered a problem.
I intend to send a email to the company that bought
Jeffco and see if they can verify this conclusion.
As always y'all's insight, commentary, Wild ass
guesses and demeaning remarks are anticipated and relished. Please though,
no gee Chris, you sure seem to be having a lot of problems. Yes and No...I
just like to share more <g>. In the tradition of John Slade, share
it all, it can only help. Heck, this is the time to break things. Much
easier to deal with now in my own hangar and not on some deserted strip or worse
yet, in the air....even if my wallet is screaming.
So, the fun starts when???????? :-)
All the best,
Chris Barber
Houston
|