X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 14 Jun 2007 12:46:13 -0400 Message-ID: X-Original-Return-Path: Received: from imo-m27.mx.aol.com ([64.12.137.8] verified) by logan.com (CommuniGate Pro SMTP 5.1.9) with ESMTP id 2102458 for lml@lancaironline.net; Thu, 14 Jun 2007 11:43:58 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.8; envelope-from=VTAILJEFF@aol.com Received: from VTAILJEFF@aol.com by imo-m27.mx.aol.com (mail_out_v38_r9.2.) id q.be1.1575ce16 (14457) for ; Thu, 14 Jun 2007 11:40:56 -0400 (EDT) From: VTAILJEFF@aol.com X-Original-Message-ID: X-Original-Date: Thu, 14 Jun 2007 11:40:55 EDT Subject: Re: [LML] Re: Boost switch X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1181835655" X-Mailer: AOL 9.0 VR sub 165 X-Spam-Flag: NO -------------------------------1181835655 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 6/14/2007 9:48:48 A.M. Central Daylight Time, rtitsworth@mindspring.com writes: Jeff's test seems to show that the TCM fuel system works well (if setup correctly) and is even tolerant of potentially incorrectly applied high boost, (at least within the range of his test conditions). Jeff, can you pls share your test conditions i.e. density altitude, power settings, etc and re-confirm your normal fuel flow set points. Rick, Excellent points! I tested the "high boost" position yesterday on my return flight from Denver. I was at 5000' MSL arriving at KSUS when I took a few minutes to check this out. Parameters: 5000' MSL ISA+20 degrees MAP 32" Rpm 2550 Fuel Flow 29 GPH (mixture full rich) Turned on boost pump and fuel flow increased 5 GPH. Same parameters from a Lean of Peak Operation at 17.2 GPH (yes, Bob, I know what Lean of Peak is-- I took the course at Ada from the best guys in the business) going to "high boost" increased fuel flow by 4 GPH. As I stated earlier, if your system is set up correctly this should be a non event BUT just in case it is not set up properly and your engine sputters on takeoff then check fuel flow. 50 GPH at WOT is too much for a TSIO 550. Reduce fuel flow with mixture knob. Pretty simple. Jeff Edwards, CFI (simple flight instruction provided) ************************************** See what's free at http://www.aol.com. -------------------------------1181835655 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
In a message dated 6/14/2007 9:48:48 A.M. Central Daylight Time,=20 rtitsworth@mindspring.com writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>Jeff's=20 test seems to show that the TCM fuel system works well (if setup
correc= tly)=20 and is even tolerant of potentially incorrectly applied high
boost, (at= =20 least within the range of his test conditions).  Jeff, can you
pls= =20 share your test conditions i.e. density altitude, power settings, etc
a= nd=20 re-confirm your normal fuel flow set points.
Rick,
 
Excellent points! I tested the "high boost" position yesterday on my re= turn=20 flight from Denver. I was at 5000' MSL arriving at KSUS when I took a few=20 minutes to check this out.
 
Parameters:
5000' MSL
ISA+20 degrees
MAP 32"
Rpm 2550
Fuel Flow 29 GPH (mixture full rich)
 
Turned on boost pump and fuel flow increased 5 GPH.
 
Same parameters from a Lean of Peak Operation at 17.2 GPH (yes, Bo= b, I=20 know what Lean of Peak is-- I took the course at Ada from the best guys in t= he=20 business) going to "high boost" increased fuel flow by 4 GPH.
 
As I stated earlier, if your system is set up correctly this should be=20= a=20 non event BUT just in case it is not set up properly and your engi= ne=20 sputters on takeoff then check fuel flow. 50 GPH at WOT is too much for a TS= IO=20 550. Reduce fuel flow with mixture knob. Pretty simple.
 
Jeff Edwards, CFI
(simple flight instruction provided)



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