X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Tue, 02 Sep 2014 09:45:56 -0400 Message-ID: X-Original-Return-Path: Received: from nk11p08mm-asmtp002.mac.com ([17.158.58.247] verified) by logan.com (CommuniGate Pro SMTP 6.0.9e) with ESMTPS id 7124002 for lml@lancaironline.net; Mon, 01 Sep 2014 13:16:34 -0400 Received-SPF: pass receiver=logan.com; client-ip=17.158.58.247; envelope-from=gw5@me.com Received: from [192.168.0.9] ([71.77.249.52]) by nk11p08mm-asmtp002.mac.com (Oracle Communications Messaging Server 7u4-27.10(7.0.4.27.9) 64bit (built Jun 6 2014)) with ESMTPSA id <0NB800KI2FYC1T10@nk11p08mm-asmtp002.mac.com> for lml@lancaironline.net; Mon, 01 Sep 2014 17:15:51 +0000 (GMT) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10432:5.12.52,1.0.27,0.0.0000 definitions=2014-09-01_03:2014-09-01,2014-09-01,1970-01-01 signatures=0 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 suspectscore=0 phishscore=0 adultscore=0 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=7.0.1-1402240000 definitions=main-1409010204 From: George Wehrung Content-type: multipart/alternative; boundary="Apple-Mail=_D7736D30-DA32-40BF-B371-44532FC78E2E" Subject: Engine Oil Temps; May need fuel system setup X-Original-Message-id: <0669AD4F-94A4-42B5-B8BA-A89A93D4E694@me.com> X-Original-Date: Mon, 01 Sep 2014 13:15:48 -0400 X-Original-To: Lancair Mailing List MIME-version: 1.0 (Mac OS X Mail 7.3 \(1878.6\)) X-Mailer: Apple Mail (2.1878.6) --Apple-Mail=_D7736D30-DA32-40BF-B371-44532FC78E2E Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=utf-8 All, I am experiencing higher than normal oil temps. It=E2=80=99s not = unusual to see 210=CB=9AF in the climb. And then the oil temps remain = above 200=CB=9A during cruise. In the last annual, there was nothing done to the fuel system. The = magnetos were spot on. We also checked the temp sensor to ensure its = accuracy against three different thermometers and ran it up and down = using a deep fryer with water. We also pulled the Vernatherm out of the = bottom of the oil cooler to ensure it was working. I also called Rosta = mfg to discuss the vernatherm operation. It cracked open at 150=CB=9A = and was full extended by 185=CB=9A per the manufacturer. In flight, I started playing with the fuel flow to see if I could lower = the temps. What I noticed was that If I put the fuel flow about 250=CB=9A= Rich of Peak I could move the oil temp down below 180=CB=9A. I could = then hold it using about 225=CB=9A ROP. I also cooled the motor by = reducing the RPM to 2300.=20 Anytime I ran the motor below 200=CB=9AROP the oil temp would climb = again. This is counterintuitive according to the Oklahoma guys = recommendations on running the EGT temps. As another point of data, I ran the engine LOP and noticed that I could = stabilize the temp at 184=CB=9A by running about 45-50=CB=9A LOP.=20 After talking to the TCM support staff it would appear that I might need = a fuel system setup but I don=E2=80=99t know of anyone that has a fuel = pressure system, which will necessitate me taking the plane to a repair = station. That system that TCM recommends is about $5,500.=20 Here are some numbers from yesterday=E2=80=99s flight: Date Altitude OAT IAS TAS % HP RPM Peak EGT Deg R/LOP GPH Fuel PSI Oil Temp Oil PSI 8/31/2014 9500 11 129 153 58 2300 1451 206 ROP 16.7 16 179 51 8/31/2014 9500 12 136 162 60 2400 1451 247 ROP 18.9 19 180 51 8/31/2014 9500 13 128 151 58 2300 1461 45 LOP 10.6 12 184 51 8/31/2014 9500 13 130 154 62 2400 1461 42 LOP 11.3 11 183 51 8/31/2014 9500 13 131 155 62 2500 1461 50 LOP 11.5 11 184 51 8/31/2014 9500 13 131 155 62 2490 1461 36 LOP 11.5 11 184 51 =20 Does anyone have any recommendations?=20 --Apple-Mail=_D7736D30-DA32-40BF-B371-44532FC78E2E Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=utf-8 All,

I am experiencing higher = than normal oil temps.  It=E2=80=99s not unusual to see 210=CB=9AF = in the climb.  And then the oil temps remain above 200=CB=9A during = cruise.

In the last annual, there was nothing = done to the fuel system. The magnetos were spot on.  We also = checked the temp sensor to ensure its accuracy against three different = thermometers and ran it up and down using a deep fryer with water. =  We also pulled the Vernatherm out of the bottom of the oil cooler = to ensure it was working.  I also called Rosta mfg to discuss the = vernatherm operation.  It cracked open at 150=CB=9A and was full = extended by 185=CB=9A per the manufacturer.

In = flight, I started playing with the fuel flow to see if I could lower the = temps.  What I noticed was that If I put the fuel flow about 250=CB=9A= Rich of Peak I could move the oil temp down below 180=CB=9A.  I = could then hold it using about 225=CB=9A ROP.  I also cooled the = motor by reducing the RPM to = 2300. 

Anytime I ran the motor below = 200=CB=9AROP the oil temp would climb again. This is counterintuitive = according to the Oklahoma guys recommendations on running the EGT = temps.

As another point of data, I ran the = engine LOP and noticed that I could stabilize the temp at 184=CB=9A by = running about 45-50=CB=9A LOP. 

After = talking to the TCM support staff it would appear that I might need a = fuel system setup but I don=E2=80=99t know of anyone that has a fuel = pressure system, which will necessitate me taking the plane to a repair = station.  That system that TCM recommends is about = $5,500. 

Here are some numbers from = yesterday=E2=80=99s flight:

Date
Altitude
OAT
IAS
TAS
% HP
RPM
Peak EGT
Deg R/LOP
GPH
Fuel PSI
Oil Temp
Oil PSI













8/31/2014
9500
11
129
153
58
2300
1451
206 ROP
16.7
16
179
51
8/31/2014
9500
12
136
162
60
2400
1451
247 ROP
18.9
19
180
51
8/31/2014
9500
13
128
151
58
2300
1461
45 LOP
10.6
12
184
51
8/31/2014
9500
13
130
154
62
2400
1461
42 LOP
11.3
11
183
51
8/31/2014
9500
13
131
155
62
2500
1461
50 LOP
11.5
11
184
51
8/31/2014
9500
13
131
155
62
2490
1461
36 LOP
11.5
11
184
51
 

Does anyone have any = recommendations? 


= --Apple-Mail=_D7736D30-DA32-40BF-B371-44532FC78E2E--