Return-Path: Received: from mtiwmhc13.worldnet.att.net ([204.127.131.117] verified) by logan.com (CommuniGate Pro SMTP 4.2b8) with ESMTP id 321231 for flyrotary@lancaironline.net; Wed, 14 Jul 2004 12:10:34 -0400 Received-SPF: error receiver=logan.com; client-ip=204.127.131.117; envelope-from=keltro@att.net Received: from 204.127.135.29 ([204.127.135.29]) by worldnet.att.net (mtiwmhc13) with SMTP id <20040714160950113009se09e>; Wed, 14 Jul 2004 16:09:51 +0000 Received: from [209.247.222.105] by 204.127.135.29; Wed, 14 Jul 2004 16:10:02 +0000 From: keltro@att.net To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: New Scoop Date: Wed, 14 Jul 2004 16:10:02 +0000 Message-Id: <071420041610.12064.40F55AD9000B67D800002F202160375964019D9B040A05@att.net> X-Mailer: AT&T Message Center Version 1 (Jun 27 2004) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_12064_1089821402_0" --NextPart_Webmail_9m3u9jl4l_12064_1089821402_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Steve, I would be more interested in the coolent temp after the radiator just before entering the engine. FWIW Kelly Troyer -- Dyke Delta/13B/RD1C/EC2 -------------- Original message from "Steve Brooks" : -------------- > John, > > > Before that, the temps would climb up, what I think is too high, > especially the oil. > That's part of the point. Maybe you're expecting temps to be lower than they > need to be. Also - how accurately is you're gauge calibrated? (I calibrated > mine with hot wax, but I'm still not sure I really trust it within 10 > degrees or so.) I'm looking forward to getting my EM2, then I'll know better > whats going on. So far though, I think I'm within acceptible limits - I'm > not loosing any coolant and the engine keeps on running :) > > First let me say that my oil temperature is a digital display from Aerospace > Logic. Its' accuracy is +/- 1/2 degree, but would depend on the sensor. > Sensor is Westach made for aviation. Coolant is a VDO gauge and sensor. I > didn't verify accuracy of either one. > > I went to the airport this morning to fit the new scoop, and since the > visibility was pretty good, I decided to take the plane up since I hadn't > flown it since I put all off the mods back that gave me fairly decent > results. The OAT was 80F, and I took off from GRD elevation 600 MSL - > density alt was already 2200' I climbed to 2200 MSL with 5lbs of boost > (5300 RPM), leveled off, and pulled the throttle back to zero boost (4600 > RPM). Oil 190 and rising, coolant 200 and rising. Oil stabilized at 217F > and coolant went up to 225 after about 2 minutes or so. That's the highest > coolant temperature that I've seen in a long while. Throttled back to -10 > boost (4200 RPM), and temperatures stabilized at 215 Oil and 200 coolant. > > I throttle up a little bit to about -5 boost, and oil temp up to 217 coolant > about the same. Cruised at that throttle setting for about 5 minutes. > Everything pretty steady. Speed only about 120 kts. Didn't retract the > nose gear. > > When I throttled down to descend and land, the oil was 180 and coolant also > about 180. My temperature gauges seem to be tied to the throttle, which > tells me that I've not got sufficient cooling. > > Last time I flew I was getting a stabalized 205/210 in the climb > (coolant/oil). When I leveled off at 5000 it settled down to 185. At 11000 > it was lower until I opened the throttle, then it stabalized at 185. > > I'd be happy with those temps. I don't know what is different between the > tow set ups. My coolant sensor is in the water pump housing, and it has a > pretty long probe on it, so I have no doubt that it's in the coolant stream. > This point is just before the coolant goes to the radiator, so it is at the > hottest point. My oil sensor is in the top of the remote oil filter, mounted > to the PSRU mounting plate. I drilled and tapped a hole directly above the > tube that the filter screws onto. This probe isn't very long, but I tapped > it in as far as possible, and I ASSUME that it's in the oil flow. The oil > filter is after the oil cooler, and just before the oil re-enters the > engine, so it should be at the coolest point. > > Your oil coolers are set up differently. I'm using one of the 2nd gen, > where you are using 2 smaller ones. Your coolers sit in the side of the > plenum, where mine sits end-to-end with the radiator. The oil cooler is > closest to the scoop, so should be getting more air. > > > > I am curious about what your temperatures are running. What do you see in > > climb ? and what do you see in cruise ? > Climb - 205/200, 1400 EGT, 100kts, 1000fpm on a 90F day. > Cruise - 185/190, 1300 EGT, 178kts, 5150 rpm, 38 MAP 11,000 ft. > > Again, these temps looks very good to me. > > I'd be interested in other perspectives on this one. > Me too. > > > Steve Brooks --NextPart_Webmail_9m3u9jl4l_12064_1089821402_0 Content-Type: text/html Content-Transfer-Encoding: 8bit

Steve,

  I would be more interested in the coolent temp after the radiator just

before entering the engine. FWIW

 

Kelly Troyer

--
Dyke Delta/13B/RD1C/EC2
-------------- Original message from "Steve Brooks" : --------------
> John,
>
> > Before that, the temps would climb up, what I think is too high,
> especially the oil.
> That's part of the point. Maybe you're expecting temps to be lower than they
> need to be. Also - how accurately is you're gauge calibrated? (I calibrated
> mine with hot wax, but I'm still not sure I really trust it within 10
> degrees or so.) I'm looking forward to getting my EM2, then I'll know better
> whats going on. So far though, I think I'm within acceptible limits - I'm
> not loosing any coolant and the engine keeps on running :)
>
> First let me say that my oil temperature is a digital display from Aerospace
> Logic. Its' accuracy is +/- 1/2 degree, but would depend on the sensor.
> Sensor is Westach made for aviation. Coolant is a VDO gauge and sensor. I
> didn't verify accuracy of either one.
>
> I went to the airport this morning to fit the new scoop, and since the
> visibility was pretty good, I decided to take the plane up since I hadn't
> flown it since I put all off the mods back that gave me fairly decent
> results. The OAT was 80F, and I took off from GRD elevation 600 MSL -
> density alt was already 2200' I climbed to 2200 MSL with 5lbs of boost
> (5300 RPM), leveled off, and pulled the throttle back to zero boost (4600
> RPM). Oil 190 and rising, coolant 200 and rising. Oil stabilized at 217F
> and coolant went up to 225 after about 2 minutes or so. That's the highest
> coolant temperature that I've seen in a long while. Throttled back to -10
> boost (4200 RPM), and temperatures stabilized at 215 Oil and 200 coolant.
>
> I throttle up a little bit to about -5 boost, and oil temp up to 217 coolant
> about the same. Cruised at that throttle setting for about 5 minutes.
> Everything pretty steady. Speed only about 120 kts. Didn't retract the
> nose gear.
>
> When I throttled down to descend and land, the oil was 180 and coolant also
> about 180. My temperature gauges seem to be tied to the throttle, which
> tells me that I've not got sufficient cooling.
>
> Last time I flew I was getting a stabalized 205/210 in the climb
> (coolant/oil). When I leveled off at 5000 it settled down to 185. At 11000
> it was lower until I opened the throttle, then it stabalized at 185.
>
> I'd be happy with those temps. I don't know what is different between the
> tow set ups. My coolant sensor is in the water pump housing, and it has a
> pretty long probe on it, so I have no doubt that it's in the coolant stream.
> This point is just before the coolant goes to the radiator, so it is at the
> hottest point. My oil sensor is in the top of the remote oil filter, mounted
> to the PSRU mounting plate. I drilled and tapped a hole directly above the
> tube that the filter screws onto. This probe isn't very long, but I tapped
> it in as far as possible, and I ASSUME that it's in the oil flow. The oil
> filter is after the oil cooler, and just before the oil re-enters the
> engine, so it should be at the coolest point.
>
> Your oil coolers are set up differently. I'm using one of the 2nd gen,
> where you are using 2 smaller ones. Your coolers sit in the side of the
> plenum, where mine sits end-to-end with the radiator. The oil cooler is
> closest to the scoop, so should be getting more air.
>
>
> > I am curious about what your temperatures are running. What do you see in
> > climb ? and what do you see in cruise ?
> Climb - 205/200, 1400 EGT, 100kts, 1000fpm on a 90F day.
> Cruise - 185/190, 1300 EGT, 178kts, 5150 rpm, 38 MAP 11,000 ft.
>
> Again, these temps looks very good to me.
>
> I'd be interested in other perspectives on this one.
> Me too.
>
>
> Steve Brooks
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