Today's Message Index:
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1. 05:25 AM - Re: EGT concerns resolved (gary)
2. 06:13 AM - Re: EGT concerns resolved (Larry McFarland)
Message 1
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| Subject: | Re: EGT concerns resolved |
--> Stratus-List message posted by: "gary" <FlyinK@Efortress.com>
Larry,
What's your static rpm and how long can you stay at WOT?
Gary
----- Original Message -----
From: "Larry McFarland" <larrymc@qconline.com>
Subject: Stratus-List: EGT concerns resolved
> --> Stratus-List message posted by: "Larry McFarland"
<larrymc@qconline.com>
>
> Hi Stratus guys,
> I ran a rough test this afternoon that shows positive results of
recommendations found in the
> archives and by people of our group. Thank you all for that. I had EGTs
in the area of 1550-degrees F at 5100-rpm. It was recommended standard 162
be replaced with 170 main jets and the circlip be lowered one notch on the
mid-range needle. That seems to have taken care of EGT concerns. This
blustery low-overcast morning run up proved EGTs were stabilized as 2500-rpm
yielded 1225-degrees F and 3000 rpm hit 1260-degrees F. CHT temps did hit
230 after progressively raising the rpm every 3-minutes. Because the prop's
now set to a 14-degree pitch, the test was repeated this afternoon and a
written record was made of the results with the cowl on. N601EZ was started
on the ramp with the clipboard in the right seat and my feet firmly on the
brakes. The preliminary check of engine function was followed by a
progressive warm-up that went like this.
> --------------------------(With an ambient temp of 68-degrees
F.) ---------------------
> ----------------warm-up -----RPM -----CHT ---------EGT -------Coolant ----
--Oil Temp
> ----------------6 minutes -@-
1000 ---123-156 ----846-1080 -------74 ------------89
> ----------------3 minutes -@-
1500 ---185-200 ----1100-1190 -----128 ----------114
> ----------------3 minutes -@-
2000 ---205-210 ----1200-1214 ---171-178 -----128-142
> ----------------3 minutes -@-
2500 ---213-215 ----1215-1235 ---180-181 -----153-155
> ----------------3 minutes -@-
3000 ---225-230 ----1257-1260 ---182-183 -----161-169
> ---------------18 min total running time and was halted before doing 3500
rpm.----------The test data isn't probably as linear as to provide a great
graph, because I was filling in data line by line from the EIS, watching the
clock, and adjusting the throttle, but the issue now moves from EGT back to
Cylinder Head Temps and to find out if adequate cooling will be added by
airflow at the radiator in flight. The test suggested there's probably
enough time to get to pattern altitude and well above the runways to find
out.
> Any other opinions out there?
> Thanks again,
>
> Larry McFarland 601HDS-Stratus w/Ram Heads
>
>
Message 2
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| Subject: | Re: EGT concerns resolved |
--> Stratus-List message posted by: "Larry McFarland" <larrymc@qconline.com>
Subject: Re: Stratus-List: EGT concerns resolved
> --> Stratus-List message posted by: "gary" <FlyinK@Efortress.com>
>
> Larry,
> What's your static rpm and how long can you stay at WOT?
> Gary
> Subject: Stratus-List: EGT concerns resolved
Gary,
Before repitching, I was able to run 4650 tied off and did climb out at 5100
rpm
on the initial flight. Havn't tried a static test per se since repitching
to 14-degrees.
Was reluctant to repeat a full throttle test on the ramp because of low
engine time.
I shouldn't think I'd get more than 4 or 5 minutes, but I'll have to time it
to see.
Larry
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