X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Sat, 09 Apr 2005 20:50:41 -0400 Message-ID: X-Original-Return-Path: Received: from imo-d05.mx.aol.com ([205.188.157.37] verified) by logan.com (CommuniGate Pro SMTP 4.3c4) with ESMTP id 863056 for lml@lancaironline.net; Sat, 09 Apr 2005 12:48:54 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.188.157.37; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-d05.mx.aol.com (mail_out_v38.7.) id q.1e1.39fd0700 (4410) for ; Sat, 9 Apr 2005 12:48:04 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: <1e1.39fd0700.2f896144@aol.com> X-Original-Date: Sat, 9 Apr 2005 12:48:04 EDT Subject: Re: [LML] Re: Oil and warming up X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1113065284" X-Mailer: 9.0 Security Edition for Windows sub 5000 -------------------------------1113065284 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit In a message dated 4/8/2005 12:30:50 P.M. Central Standard Time, domcrain@pacific.net.au writes: If the prop fails to coarsen, then at least an attempt has been made to improve the glide ratio. Any coarsening of the prop will do so in the event of total power loss. I note in the Hartzell manual the statement "An operational check of the governor and the propeller should be made during the run up". No limitation on the extent of the check is identified in the manual I have, and I imagine it is up to the individual to choose. Equally, there appears no warning or advice to the effect that full governor checks are detrimental, but I'll check the Textron manual to see if it is mentioned. My checklist for engine failure, or power loss requiring a forced landing, includes the requirement to select full coarse on the prop. The full coarse blade angle is 40.1 degrees, and sure is better than the speed brake angle of 12.0 degrees. Dom, Righto! Remembering various POHs, I use a drop of about 300 rpm (1800 --> 1500) to test the oil, prop, gov'nr and the B-nut that holds the actuating cable. Since this test isn't done until the engine shows some internal warmth (oil at least 85F after the run up mag switch ck), I don't think any undue stress is placed on the engine. Occasionally, when I have nothing better to do, I will slow down to best glide at some idle power setting and pull the prop coarse pitch - again, this should place no special stress on the engine including rapid cooling since the low air speed mediates that. Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) Fair and Balanced Opinions at No Charge! Metaphysical Monologues used at your own Risk. -------------------------------1113065284 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

In a message dated 4/8/2005 12:30:50 P.M. Central Standard Time,=20 domcrain@pacific.net.au writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>If the=20 prop fails to coarsen, then at least an attempt has been made to
improv= e=20 the glide ratio.
Any coarsening of the prop will do so in the event of=20 total power loss.
I note in the Hartzell manual the statement "An=20 operational check of the
governor and the propeller should be made duri= ng=20 the run up".
No limitation on the extent of the check is identified in=20= the=20 manual I
have, and I imagine it is up to the individual to=20 choose.
Equally, there appears no warning or advice to the effect that=20 full
governor checks are detrimental, but I'll check the Textron manual= =20 to
see if it is mentioned.
My checklist for engine failure, or power= =20 loss requiring a forced
landing, includes the requirement to select ful= l=20 coarse on the prop.
The full coarse blade angle is 40.1 degrees, and su= re=20 is better than the
speed brake angle of 12.0 degrees.=20

Dom,

Righto!

Remembering various POHs, I use a drop of about 300 rpm (1800 -->=20 1500) to test the oil, prop, gov'nr and the B-nut that holds the actuat= ing=20 cable. Since this test isn't done until the engine shows some internal= =20 warmth (oil at least 85F after the run up mag switch ck), I don't think= any=20 undue stress is placed on the engine. Occasionally, when I have nothin= g=20 better to do, I will slow down to best glide at some idle power setting and=20= pull=20 the prop coarse pitch - again, this should place no special stress on the en= gine=20 including rapid cooling since the low air speed mediates that.

Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL (KARR)

Fai= r=20 and Balanced Opinions at No Charge!
Metaphysical Monologues used at your=20= own=20 Risk.

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