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Chris, without a load on the engine it is very difficult
to diagnose your problem or even know if you really have a problem.
Without a prop my engine would hit 5000 rpm at my idle setting. So in
effect you are probably still in the "idle" region - but, not knowing the
manifold pressure you are reading its difficult to say.
I do know that without a prop load any tuning of the fuel
map you do is not only useless, but probably counter productive. You must
have a load to properly tune the EC2 fuel map.
My concern is that without a load and you "playing" with
the engine - you already speak of hitting 8000 rpm - with no load that probably
doesn't hurt the engine - but just crack the throttle a bit more and you
could.
If you don't have a prop and have a 2.17:1 gear box, I'll
ship you my old prop to test with - just don't want to see your efforts get
spoiled by a possible mishap on the throttle {:>)
Best Regards
Ed
----- Original Message -----
Sent: Tuesday, June 26, 2007 12:53
AM
Subject: [FlyRotary] Chris' Engine
Saga......
I got the EM working on Sunday after work. As I
said, I ran out of time in the hangar the other day, so when I was able to get
back out there after work yesterday, I was able to hook the dimmer knob to the
EM. Turned it up and I got a visual on the instrument. Whew.
I am
having VERY inconsistant readings for RPM. it will "bounce" from the 3000 rpm
range to 8000, then 6000 ish, then back down to 3000. Mostly in the 3000 ish
range, but still VERY eratic. Don't know what is causing this yet. Maybe due
to no load? (as was stated somewhere, I prefer to look for leaks and finish
running wires (now that basic wire run routing seem to be ok) withOUT a prop
turning next to my ear....and neck at 3000 rpm. Also, it seems to start great
one time and then not really want to start at all the next time I try.
Geeesh.
Well to follow up, today was one of those good bad days....or
bad good days. I feel like I got stuff done, but in the end it was
unsatisfying.
When I first got to the hangar, I kinda went "what the
hell" and decided to start the engine. I pushed in all the C/B, all switches
up (except for the "A" ECU switch and the cold start switch), primary pump on,
mixture knob rich, hit the start button and immediate start. Loud as hell, but
it was running. Kewl. Only let it run for a very short time as I didn't want
it to get too hot to work on. The RPM' readings on the EM were still very
eradic, but other sensors that I have now connected (oil temp, oil pressure,
water temp, water pressure) at least were reading SOMETHING.....thats a
start.
I went about the day making things a bit more secure in the
engine area running a few more sensor wires a bit more properly, chasing down
and hopefully securing a couple of known leaks etc and, DAMN IT, before I
knew what happened, most of the day was gone and Jana was telling me it was
getting late and we needed to go home to eat (she had been watching TV
patiently.....uh, this time  , on the big screen we have in the hangar ever since she had arrived
with our dogs after she got off work earlier in the afternoon). "Oh, OK, let
me finish up a couple of things (always) and then let me start it
again before we go........here baby put on these ear gaurds". Yep, it
started, did not run great, but it ran, then it seem to run out of gas and
stalled. Hmmm, I think I really ran out of gas (I only had a few gallons in
the sump tank). So, we put more gas in, but for the life of me I could not get
it to start again........seemed to want to start a couple of times, but a few
times it didn't seem as if it had ever started . Jana left to go start dinner......I stayed for more of the same. Gee, another hour past already, geeezsh, I gotta go, it is getting
dark .
Oh well, at least I get two days off a week, so
back again in the morning and see what I can do to get it running again and
maybe, hopefully to consistantly start. <sigh>
Thoughts and
comments are welcome.
All the best,
Chris
<Cross posted at the Canard Aviation
forum>
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