Today's Message Index:
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1. 03:10 PM - Jaguar cowling pirep (Martin Ringvold)
2. 04:23 PM - Re: Jaguar cowling pirep (BILL9725@AOL.COM)
Message 1
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| Subject: | Jaguar cowling pirep |
Well, I took the leap and ordered the first production AuCountry Jaguar-c
owling.-I've flown the plane about 10 hours since I received it from Gary
about two weeks ago.
-
I use the-79 Tiger-primarily for 150-450 NM cross country trips from-
Norcal to-the Bay Area and Los-Angles for work and pleasure. Besides-
the urge for a fancy upgrade I've-always been bothered by the high EGT an
d oil temperatures in climb and cruise on these frequent trips. I've got th
e EDM-700-and I'm aware of the past discussions whether EDM indicates hig
her temperatures than their EI engine monitor counterpart. Although I disli
ke the "EDM-temps" creeping up well-beyond 400 CHTs under most circumst
ances except cold weather-(mid 30s-40 here in CA)-Gary has always maint
ained that I don't have a CHT heating issue. Still, with the powerflow alre
ady in place (required for the STC) I went for the upgrade.
-
I don't have well documented before-data but I know my plane pretty well af
ter ~350 hours flown, mostly XC. Under conditions seen in the last two week
s with temperatures a bit over standard temperatures I would normally cruis
e between 8-10K at 2600 leaned out with myself, full fuel-and 30 lbs of b
ags. In the past (with standard temperature days)-I would see #3 creep up
to ~425 in climb and hoover around/over 400 in cruise (worse in the summer
time). Now, I see #1 as the hottest cylinder in climb-at ~410- but tak
e into consideration that I've leaned more aggressively these past jaguar-h
ours in-climb due to the better cooling.-At cruising altitude (10K)-2
600 RPM-#1 remains the hottest around 375 while the-2,3 and-4 stays i
n the-high 360s. At full throttle at-10K leaned out (100-75 ROP) I did
not see CHTs-over 400.-The oil temperature on my recent 3 hour-flight
lied-flat-on 180 degrees. I've had problems keeping it below 200-in
the past
but I must admit I pay closer attention to the oil temperatures in the sum
mer months so I can't cough up a good standard-day comparison for oil temps
before we're in the summer days.-
-
I think its too early for me to cement the actual cooling improvement numbe
rs but so far I'm very satisfied too see the EDM CHTs well below 400 and I'
m looking forward to see the numbers once it gets into the 100s here in CA.
-
With the same-few recent data points, I've seen 143-144 TAS at 10K full t
hrottle performance on these recent trips. In the past, with my removed ste
ps, tail strobe mod, Lycon 400 SMOH engine-and 63 prop pitch-I've obser
ved time and again that my plane came out to the original FT "tiger speed"
at 138-139 TAS, all measured with the Garmin 430W TAS computer.
-
The oil check involves cowling pop-screws so the pre-flight takes a bit mor
e time on the ground. Other than that, my wife things the "plane looks new"
and she suggested a new paint job since the cowling came out with white pa
int...I'll try to talk her out of it...
-
Martin
N3752W=0A=0A=0A
Message 2
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| Subject: | Re: Jaguar cowling pirep |
Hi Martin
Thanks so much for the report on Gary`s great creation. I have been in
sic with you on the same issues on my 75 tiger, also located in Northern
Calif. My number 4 cylinder will always hover around 425 on normal cruise
2600 same altitude. I am looking to do the same but do not already have the
power flow already on. The fun part is to think it will be great because
the engine is similar to yours but a Millie um motor with only 150 hours on
it. Very strong though as it will easily climb to over 13,000 and more and
I have yet to see a altitude where I did not have to pull back to keep it
under 2700, same 63 inch prop. So I am looking to go with Gary`s mod and a
65 inch prop. What kind of fuel flows are you seeing? I have the EDM
with fuel flows and am sure you mod also saves here too!
I am going to the meet at Willow on Saturday and hope you can attend also
so we can go over the mod in detail.
Bill
N1540R
In a message dated 3/25/2010 3:11:27 P.M. Pacific Daylight Time,
mringvold@YAHOO.COM writes:
Well, I took the leap and ordered the first production AuCountry Jaguar
cowling. I've flown the plane about 10 hours since I received it from Gary
about two weeks ago.
I use the 79 Tiger primarily for 150-450 NM cross country trips from
Norcal to the Bay Area and Los Angles for work and pleasure. Besides the urge
for a fancy upgrade I've always been bothered by the high EGT and oil
temperatures in climb and cruise on these frequent trips. I've got the EDM-700
and
I'm aware of the past discussions whether EDM indicates higher
temperatures than their EI engine monitor counterpart. Although I dislike the
"EDM
temps" creeping up well beyond 400 CHTs under most circumstances except cold
weather (mid 30s-40 here in CA) Gary has always maintained that I don't
have a CHT heating issue. Still, with the powerflow already in place (required
for the STC) I went for the upgrade.
I don't have well documented before-data but I know my plane pretty well
after ~350 hours flown, mostly XC. Under conditions seen in the last two
weeks with temperatures a bit over standard temperatures I would normally
cruise between 8-10K at 2600 leaned out with myself, full fuel and 30 lbs of
bags. In the past (with standard temperature days) I would see #3 creep up to
~425 in climb and hoover around/over 400 in cruise (worse in the summer
time). Now, I see #1 as the hottest cylinder in climb at ~410 but take into
consideration that I've leaned more aggressively these past jaguar-hours
in climb due to the better cooling. At cruising altitude (10K) 2600 RPM #1
remains the hottest around 375 while the 2,3 and 4 stays in the high 360s.
At full throttle at 10K leaned out (100-75 ROP) I did not see CHTs over
400. The oil temperature on my recent 3 hour flight lied flat on 180 degrees.
I've had problems keeping it below 200 in the past but I must admit I pay
closer attention to the oil temperatures in the summer months so I can't
cough up a good standard-day comparison for oil temps before we're in the
summer days.
I think its too early for me to cement the actual cooling improvement
numbers but so far I'm very satisfied too see the EDM CHTs well below 400 and
I'm looking forward to see the numbers once it gets into the 100s here in
CA.
With the same few recent data points, I've seen 143-144 TAS at 10K full
throttle performance on these recent trips. In the past, with my removed
steps, tail strobe mod, Lycon 400 SMOH engine and 63 prop pitch I've observed
time and again that my plane came out to the original FT "tiger speed" at
138-139 TAS, all measured with the Garmin 430W TAS computer.
The oil check involves cowling pop-screws so the pre-flight takes a bit
more time on the ground. Other than that, my wife things the "plane looks
new" and she suggested a new paint job since the cowling came out with white
paint...I'll try to talk her out of it...
Martin
N3752W
(http://www.matronics.com/Navigator?TeamGrumman-List)
.com/contribution)
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