X-Virus-Scanned: clean according to Sophos on Logan.com X-PolluStop: No license found, only first 5 messages were scanned Return-Path: Sender: To: lml@lancaironline.net Date: Sun, 12 Jun 2005 12:18:38 -0400 Message-ID: X-Original-Return-Path: Received: from imo-m14.mx.aol.com ([64.12.138.204] verified) by logan.com (CommuniGate Pro SMTP 4.3.4) with ESMTP id 992325 for lml@lancaironline.net; Sat, 11 Jun 2005 11:47:16 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.138.204; envelope-from=CustomACProp@aol.com Received: from CustomACProp@aol.com by imo-m14.mx.aol.com (mail_out_v38_r1.7.) id q.1c4.2a287c4a (4418) for ; Sat, 11 Jun 2005 11:46:21 -0400 (EDT) From: CustomACProp@aol.com X-Original-Message-ID: <1c4.2a287c4a.2fdc614c@aol.com> X-Original-Date: Sat, 11 Jun 2005 11:46:20 EDT Subject: Re: [LML] Re: IV-P Prop and De-ice X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1118504780" X-Mailer: 9.0 SE for Windows sub 5011 -------------------------------1118504780 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit The feathering MT Propeller has an internal mechanical stop to limit the blade travel to a mid pitch position during normal engine shutdown. This allows an engine start without the propeller blades being in the feathered position. The only time the mechanical stop operates is in a normal shutdown. It is designed to not function at any other time. On the feathering MT Propeller the governor oil pressure is required to maintain correct blade position. If the governor fails, the propeller feathers. If the governor can't provide oil pressure because the engine oil pressure is too low, the propeller feathers. If the governor can't provide oil pressure because the engine oil is too hot, the propeller feathers. If the propeller feathers, it's time to land, now. With the normal counterweighed MT Propeller, the loss of oil pressure causes the blades to go to a coarse pitch. If there is a little power available from the engine even for a short time, you can have more choices on where you land. Compared to the drag from a standard propeller, the counterweighted blade propeller has a 67% decrease in drag. The feathering propeller has a 88% reduction in drag. MT Propeller in Germany has taken the position that they would prefer to NOT sell the feathering propeller for single engine aircraft. Having said that, I have a local customer that is receiving his feathering propeller shortly. Regards, Jim Ayers Custom Aircraft Propeller _www.lessdrag.com_ (http://www.lessdrag.com) (805) 795-5377 In a message dated 06/10/2005 1:23:59 PM Pacific Daylight Time, VTAILJEFF@aol.com writes: In a message dated 6/10/2005 9:50:01 A.M. Central Standard Time, CustomACProp@aol.com writes: This reduces the propeller drag almost as much as a feathering propeller, without the flight hazard of a feathering propeller. What is the flight hazard of a feathering propeller? Jeff Edwards -------------------------------1118504780 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable
The feathering MT Propeller has an internal mechanical stop to limit th= e=20 blade travel to a mid pitch position during normal engine shutdown.  Th= is=20 allows an engine start without the propeller blades being in the feathered=20 position.
 
The only time the mechanical stop operates is in a normal shutdown.&nbs= p;=20 It is designed to not function at any other time.
 
On the feathering MT Propeller the governor oil pressure is requir= ed=20 to maintain correct blade position.
If the governor fails, the propeller feathers.
If the governor can't provide oil pressure because the engine oil press= ure=20 is too low, the propeller feathers.
If the governor can't provide oil pressure because the engine oil is to= o=20 hot, the propeller feathers.
 
If the propeller feathers, it's time to land, now.
 
With the normal counterweighed MT Propeller, the loss of oil pressure=20 causes the blades to go to a coarse pitch.
If there is a little power available from the engine even for a sh= ort=20 time, you can have more choices on where you land.
 
Compared to the drag from a standard propeller, the counterweighted bla= de=20 propeller has a 67% decrease in drag.  The feathering propeller has a 8= 8%=20 reduction in drag.
 
MT Propeller in Germany has taken the position that they would prefer t= o=20 NOT sell the feathering propeller for single engine aircraft.
Having said that, I have a local customer that is receiving his feather= ing=20 propeller shortly.
 
Regards,
Jim Ayers
Custom Aircraft Propeller
(805) 795-5377
 
In a message dated 06/10/2005 1:23:59 PM Pacific Daylight Time,=20 VTAILJEFF@aol.com writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>
In a message dated 6/10/2005 9:50:01 A.M. Central Standard Time,=20 CustomACProp@aol.com writes:
This=20 reduces the propeller drag almost as much as a feathering propeller, wit= hout=20 the flight hazard of a feathering propeller.
What is the flight hazard of a feathering propeller?
 
Jeff Edwards
 
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