Today's Message Index:
----------------------
1. 04:34 AM - Re: Firefly/447 RPM question (Richard Pike)
2. 05:04 AM - Re: Re: Firefly/447 RPM question (John Hauck)
3. 06:01 AM - Re: Re: Firefly/447 RPM question (Jim Baker)
4. 09:20 AM - Re: N58SG Sold (west1m)
5. 05:56 PM - Re: Firefly/447 RPM question (Richard Pike)
6. 07:28 PM - Re: Firefly/447 RPM question (Stuart Harner)
Message 1
INDEX | Back to Main INDEX |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Firefly/447 RPM question |
John Hauck wrote:
> Shouldn't the plug check be done at the power setting that you want to
> check, e.g., cruise, WOT, etc?
>
> If the plugs are checked after landing and taxi back to the hanger, does
> that not give you an indication for low speed, low power settings?
>
> john h
> mkIII
> Titus, Alabama
>
> --
I have always heard that, but years ago when I was building dirt bikes - 2 stroke
- I would check the plugs after a plain "ride," and then do a run at a specific
speed or load to check the jetting, and I couldn't see the difference. Perhaps
an expert with a magnifying glass could, but in my laymans experience, the
plugs sort of were what they were. For instance, putting in brand new plugs,
going out and doing a test, and then pulling them and looking at them, there
was not enough accumulation to tell much of anything.
Maybe I was just doing something wrong, or maybe I am missing something. I would
be glad to hear from somebody who is actually real good at that particular skill.
Since I run at cruise power & 1,000' AGL 95% of the time, and then just pull it
back on final, and then a fast idle downhill to taxi to the hangar, I am thinking
that I am not going to alter the appearance of the plugs all that much from
their normal state by that last 3 minutes of run time. But I could be wrong.
--------
Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0
There are two kinds of people: those who say to God, 'Thy will be done,' and those
to whom God says, 'All right, then, have it your way.'
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=441434#441434
Message 2
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Firefly/447 RPM question |
That's what I'm thinking. I can't see well enough to tell minute
differences.
john h
mkIII
Titus, Alabama
I have always heard that, but years ago when I was building dirt bikes - 2
stroke - I would check the plugs after a plain "ride," and then do a run at
a specific speed or load to check the jetting, and I couldn't see the
difference. Perhaps an expert with a magnifying glass could, but in my
laymans experience, the plugs sort of were what they were. For instance,
putting in brand new plugs, going out and doing a test, and then pulling
them and looking at them, there was not enough accumulation to tell much of
anything.
Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0
There are two kinds of people: those who say to God, 'Thy will be done,' and
those to whom God says, 'All right, then, have it your way.'
Message 3
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Firefly/447 RPM question |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 4
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Lookin' forward to seeing Steve's new MKIII!
--------
West1m
Hastings, MN
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=441457#441457
Message 5
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Firefly/447 RPM question |
OK, had a good flying day today. Temp when we started flying was low 60's. MKIII
Classic, 582, 2 people, 1@200 lbs, 1@185. Full throttle climbout, 6300 rpm,
50 mph, EGT 1000. Water temp constant at 140 in all situations.
Cruise 1075-1100 EGT, stayed very constant, no appreciable variability. RPM varies
5500-5900. (Lots of lift & sink across the low hills) Airspeed averaged 65.
Temp later in the day 70, no change in any of the above numbers, airspeed on final
approach at a couple different strips was 60, EGT 1000 @ 3000-3800 rpm. I
fly cruise airspeed until time to throttle back, dump the flaps, and reset the
trim.
Final numbers, 1.5 hours total, 7 gallons used. Last landing of the day before
I took the pictures had time on final of probably less than a minute at 3-4k rpm,
burst of power on short final. Landing, turning around and taxiing to the
hangar took probably around a minute and a half, was at a low rpm, EGT was at
900. Pulled the plugs and took several pictures, this one is the most accurate
in terms of how they actually looked. Interestingly, the plugs at the PTO end
were lighter and more reddish, the ones at the mag end were a bit darker and
more grey.
Numbering from left to right, #1 is closest to the mag. #2 is also mag end cylinder,
but closer to the PTO end, #3 is the PTO side cylinder, mag end, and #4
is PTO side cylinder, PTO end. Have no idea why the difference.
Based on everything I have seen today, and on the way the plugs look now (IMO slightly
on the rich side of ideal) I think that once summer gets here with much
hotter temperatures, I will raise the needle clip by one notch to lower the
needle and lean it a tad, and in the fall drop it back down to its current position
to richen it a bit in the winter.
Not sure that this establishes any sort of jetting/load/EGT/spark plug doctrine
or proves anything, I just found this whole topic interesting and wanted to pursue
it. Maybe it will be food for thought, and as Beauford says: worth what
ya paid for it.
--------
Richard Pike
Kolb MKIII N420P (420ldPoops)
Kingsport, TN 3TN0
There are two kinds of people: those who say to God, 'Thy will be done,' and those
to whom God says, 'All right, then, have it your way.'
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=441475#441475
Attachments:
http://forums.matronics.com//files/p1040455_medium_124.jpg
Message 6
INDEX | Back to Main INDEX |
PREVIOUS | Skip to PREVIOUS Message |
NEXT | Skip to NEXT Message |
LIST | Reply to LIST Regarding this Message |
SENDER | Reply to SENDER Regarding this Message |
|
Subject: | Re: Firefly/447 RPM question |
Well today the wind was light and variable and it was 60 by noon. Headed to
the airport.
By the time I got launched into the air, it was nearly 2PM. Rough and bumpy!
Just enough thermal action to make it not pleasant. Went up to 1500' AGL
and it only got worse. Dropped back to 800' and it was a little better.
Did some playing around at different RPM's and airspeeds. 5500 was yielding
about 60 to 65 indicated. Nosing over and unloading the engine would spike
the EGT. I have reset the alarm to 1190 Saw it jump to 1220 once. Quick
application of throttle or enricher takes care of it. Flew for about 30
minutes between 5 and 6K. Not much fun so headed back. EGT spike again,
added full enrich to keep it cool. Kept some power on all the way to the
ground and made a nice landing. Back to idle, tail down, engine quit!
WTH???
Turns out I just forgot to take off the enrich and I flooded it. Got it
going again and taxied back to the hangar. Decided to add 1/2 of pitch to
the prop. Messed around with that for a while, had a soft drink, visited
around some. Then could not stand it any longer, had to go back up.
Was able to get 6300+ on takeoff and it still climbs like a scalded cat. Air
was a little smoother, so decided to go for a ride. Flew up to my house ~20
miles away. At 5500 I was getting a consistent 65 MPH indicated, 600o would
get me to 70. In the thermals if I nosed over to keep from climbing, I could
easily see 70-75 MPH. Air was still rough enough it was hard to maintain
speed AND altitude. So I would work on one, then the other. Even at 5000 RPM
I was still seeing 60 MPH or more and the EGT was running in the mid to
upper 1100 range but no alarms going off.
Back to the airport, if I pulled power into the high 4000 range and nosed
over, I would get an alarm. Just as I was struggling to get down for a
landing, I noticed that the wind had shifted and was now on my tail. Go
around time! Circled and got lined up for the opposite end and still had
some trouble getting down, even with some fairly aggressive slips. Backed
down to the3500 range and nosed over, then the ground came up fast.
Airspeed was at 50 so all was well, added some power and rounded out for a
fairly decent landing.
So all in all, the mid-range lean problem is much smaller than it was and
even though I moved the prop a little towards a cruise setting it did not
affect the climb at all. I want to get up in some really smooth air to do
more testing before making any more changes. 1.8 hours on the tach and a
good day!
Thanks for all the advice and input. This is going to be FUN!
Stuart
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|