X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 20 Jun 2012 19:15:53 -0400 Message-ID: X-Original-Return-Path: Received: from [205.186.160.203] (HELO server.rmcginc.com) by logan.com (CommuniGate Pro SMTP 5.4.5) with ESMTPS id 5610503 for lml@lancaironline.net; Wed, 20 Jun 2012 19:05:39 -0400 Received-SPF: none receiver=logan.com; client-ip=205.186.160.203; envelope-from=r.rickard@rcginc-us.com Received: (qmail 15446 invoked from network); 20 Jun 2012 16:05:04 -0700 Received: from 24-107-105-58.dhcp.stls.mo.charter.com (HELO ?192.168.1.15?) (24.107.105.58) by rmcomserver.com with SMTP; 20 Jun 2012 16:05:04 -0700 From: Bob Rickard Content-Type: multipart/alternative; boundary="Apple-Mail=_2142F2E8-4D60-4E3D-BEB2-5628C5F2771E" Subject: New TSIO 550-X break in - need suggestions X-Original-Date: Wed, 20 Jun 2012 18:05:04 -0500 X-Original-Message-Id: <34741291-CDD7-468A-9707-4076CE6236EF@rcginc-us.com> X-Original-To: lml@lancaironline.net Mime-Version: 1.0 (Apple Message framework v1278) X-Mailer: Apple Mail (2.1278) --Apple-Mail=_2142F2E8-4D60-4E3D-BEB2-5628C5F2771E Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii IV-P non turbine Fellow Pilots: I recently received a rebuilt TSIO-550 from Barrett Precision Aircraft = in Tulsa. Was quoted 9 weeks to overhaul, took 5 1/2 months (but that = is another story). The good news is that the motor is back in the = airplane, and looks and runs fantastic. My problem is, its running hot = inside my airplane. The bottom line is - I am looking for suggestions = on how to solve the problem described below- I have about 600 hours in = my airplane on the previous engine, have taken the GAMI course, and run = LOP cross-country almost exclusively. Motor installed and test run. Every effort to try and install exactly = like it left - only exception is spark plug wires installed below the = air tubes (they were on top before - I don't know why the mechanic put = them underneath). No problems with Cowl off. =20 First flight - one pattern only - Max MAP was set too low, low fuel flow = - fixed. Next flight - 10 minutes - Cylinders 5 and 6 temps run away hot at 38.5 = MAP and 45gph. Must retard throttle to less than 25gph (25ish MAP) to = keep under control. Third flight - after checking baffling for hours and scratching head - = same deal. Fly for 1 hour full rich at low power settings. Motor very = smooth and happy at low settings, but as soon as throttle pushed in, = cyl's 5 and 6 climb at about 1 degree per second - power always retarded = not to exceed 390 and cool down in the 350-360 range before trying to = push up power again. Fourth flight - today - a 2.3. Takeoff WOT and full rich. Can't get = above 3000' agl before having to pull power for cal 5 and 6. Pull power = to 25gph/25 MAP/Full rich and slowly climb to 10.5k MSL. Fly there for = a while, cylinders all look great in the 340-350 range. After an hour, = try full power climb, have to stop within 1500' of climb. So then I = leveled out, and set my typical speed cruise LOP mode to try something = different - 34MAP, 2500 RPM, 18-19 gph. Motor is very happy. All EGT's = normal (actually less than previous engine by almost 100 deg), CHT's all = between 340-365. I climb with this setting to 16.5 and cruise for = another hour, no problem. Return to base, set full rich/2700 rpm, and = land normally. At retarded power settings in the pattern, motor stays = cool and happy. So what to look at? New motor mounts make the engine sit noticeably = lower in the cowl, and we are checking the rear baffling to make sure = there is a good seal, but would that affect the front 2 cylinders (5 and = 6)? Every other indication (including the other 4 cylinder temps) are = totally normal. Any other suggestions out there to look for? =20 Appreciate your experience Bob Rickard --Apple-Mail=_2142F2E8-4D60-4E3D-BEB2-5628C5F2771E Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii IV-P = non turbine Fellow Pilots:

I recently received a = rebuilt TSIO-550 from Barrett Precision Aircraft in Tulsa.  Was = quoted 9 weeks to overhaul, took 5 1/2 months (but that is another = story).  The good news is that the motor is back in the airplane, = and looks and runs fantastic.  My problem is, its running hot = inside my airplane.  The bottom line is - I am looking for = suggestions on how to solve the problem described below- I have about = 600 hours in my airplane on the previous engine, have taken the GAMI = course, and run LOP cross-country almost = exclusively.

Motor installed and test run. =  Every effort to try and install exactly like it left - only = exception is spark plug wires installed below the air tubes (they were = on top before - I don't know why the mechanic put them underneath). No = problems with Cowl off.  
First flight - one pattern only = - Max MAP was set too low, low fuel flow - fixed.
Next flight = - 10 minutes - Cylinders 5 and 6 temps run away hot at 38.5 MAP and = 45gph.  Must retard throttle to less than 25gph (25ish MAP) to keep = under control.
Third flight  - after checking baffling = for hours and scratching head - same deal.  Fly for 1 hour full = rich at low power settings.  Motor very smooth and happy at low = settings, but as soon as throttle pushed in, cyl's 5 and 6 climb at = about 1 degree per second - power always retarded not to exceed 390 and = cool down in the 350-360 range before trying to push up power = again.
Fourth flight - today - a 2.3.  Takeoff WOT and = full rich.  Can't get above 3000' agl before having to pull power = for cal 5 and 6.  Pull power to 25gph/25 MAP/Full rich and slowly = climb to 10.5k MSL.  Fly there for a while, cylinders all look = great in the 340-350 range.  After an hour, try full power climb, = have to stop within 1500' of climb.  So then I leveled out, and set = my typical speed cruise LOP mode to try something different - 34MAP, = 2500 RPM, 18-19 gph.  Motor is very happy.  All EGT's normal = (actually less than previous engine by almost 100 deg), CHT's all = between 340-365.  I climb with this setting to 16.5 and cruise for = another hour, no problem.  Return to base, set full rich/2700 rpm, = and land normally.  At retarded power settings in the pattern, = motor stays cool and happy.

So what to look at? =  New motor mounts make the engine sit noticeably lower in the cowl, = and we are checking the rear baffling to make sure there is a good seal, = but would that affect the front 2 cylinders (5 and 6)?  Every other = indication (including the other 4 cylinder temps) are totally normal. =  Any other suggestions out there to look for? =  

Appreciate your = experience


Bob = Rickard

= --Apple-Mail=_2142F2E8-4D60-4E3D-BEB2-5628C5F2771E--