X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Mon, 12 Aug 2013 18:01:45 -0400 Message-ID: X-Original-Return-Path: Received: from mail-pa0-f50.google.com ([209.85.220.50] verified) by logan.com (CommuniGate Pro SMTP 6.0.5) with ESMTPS id 6414913 for lml@lancaironline.net; Mon, 12 Aug 2013 17:15:13 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.220.50; envelope-from=toddlong1@gmail.com Received: by mail-pa0-f50.google.com with SMTP id fb10so7942533pad.23 for ; Mon, 12 Aug 2013 14:14:37 -0700 (PDT) X-Received: by 10.66.162.195 with SMTP id yc3mr971914pab.64.1376342077096; Mon, 12 Aug 2013 14:14:37 -0700 (PDT) X-Original-Return-Path: Received: from [10.157.29.148] (mobile-166-137-213-153.mycingular.net. [166.137.213.153]) by mx.google.com with ESMTPSA id fk4sm42128860pab.23.2013.08.12.14.14.33 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Mon, 12 Aug 2013 14:14:36 -0700 (PDT) Subject: [LML] Re: Flaps on take-off? References: From: Todd Long Content-Type: multipart/alternative; boundary=Apple-Mail-E8058BDB-F606-4ED2-B8AD-8B4D987380F3 X-Mailer: iPad Mail (10B329) In-Reply-To: X-Original-Message-Id: <54E70021-8454-4FA4-90D9-DE8CECB76553@gmail.com> X-Original-Date: Mon, 12 Aug 2013 16:14:26 -0500 X-Original-To: Lancair Mailing List Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (1.0) --Apple-Mail-E8058BDB-F606-4ED2-B8AD-8B4D987380F3 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Since the subject seems to be safety. Besides having a higher likelihood of b= lowing a tire and increased wear, there is also climb performance. In most a= ll cases the altitude gained during what would be the equivalent of " second= segment" climb will be lower thru the clearway in relation to distance from= the runway threshold if flaps aren't used. Simply said if you have an engin= e failure after takeoff when not using flaps you will be farther away and lo= wer all things the same.=20 Planes like Cessnas and Pipers are designed for normal ops with no flap tak= eoffs. High performance aircraft are not.=20 Sent from my iPad On Aug 12, 2013, at 5:25, "Frederick Moreno" w= rote: >=20 > > On my non-P non-turbo Lancair IV, empty weight 1984 pounds, short wings wi= th no winglets, nearly full fuel, 400 pounds of pork in the front seats, gat= hering data and calibrating the AOA, we established Vs =3D 77 knots and Vso =3D= 69 knots. Using AOA, final approach speeds range from 95 nearly empty to 1= 10 when stuffed full of fuel, pork, and baggage. > =20 > Fred Moreno > =20 > =20 > =20 > =20 > -------Original Message------- > =20 > From: Robert R Pastusek > Date: 12/08/2013 12:01:43 PM > To: Lancair Mailing List > Subject: RE: [LML] Re: Flaps on take-off? > =20 > That is very close to the speeds for N-437RP (my Lancair IV-P), but not ex= actly. A good starting point, but please recall that these airplanes are all= hand-built and no two are alike. I would strongly suggest getting one of th= e experienced test pilots within our community to test fly and determine the= stall speeds for your individual airplane. >=20 > =20 >=20 > Bob P >=20 > =20 >=20 > From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of F. B= arry Knotts >=20 >=20 > L-IV-P > Vs =3D 80 KIAS, Vso =3D 71 KIAS. (Measured by professional test pilot!)= No data on partial flaps. >=20 > Barry Knotts >=20 > On 8/10/2013 12:02 AM, Paul Miller wrote: >=20 > Does anyone have the stall speeds for IV: flaps up versus takeoff flaps? >=20 > =20 >=20 > =20 --Apple-Mail-E8058BDB-F606-4ED2-B8AD-8B4D987380F3 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 7bit
Since the subject seems to be safety. Besides having a higher likelihood of blowing a tire and increased wear, there is also climb performance. In most all cases the altitude gained during what would be the equivalent of " second segment" climb will be lower thru the clearway in relation to distance from the runway threshold if flaps aren't used. Simply said if you have an engine failure after takeoff when not using flaps you will be farther away and lower all things the same. 

Planes like Cessnas  and Pipers are designed for normal ops with no flap takeoffs. High performance aircraft are not. 
Sent from my iPad

On Aug 12, 2013, at 5:25, "Frederick Moreno" <frederickmoreno@bigpond.com> wrote:

<SENDER_EMAILfrederickmoreno@bigpond@@com.png>
On my non-P non-turbo Lancair IV, empty weight 1984 pounds, short wings with no winglets, nearly full fuel, 400 pounds of pork in the front seats, gathering data and calibrating the AOA, we established Vs = 77 knots and Vso = 69 knots.  Using AOA, final approach speeds range from 95 nearly empty to 110 when stuffed full of fuel, pork, and baggage.
 
Fred Moreno
 
 
 
 
-------Original Message-------
 
Date: 12/08/2013 12:01:43 PM
Subject: RE: [LML] Re: Flaps on take-off?
 

That is very close to the speeds for N-437RP (my Lancair IV-P), but not exactly. A good starting point, but please recall that these airplanes are all hand-built and no two are alike. I would strongly suggest getting one of the experienced test pilots within our community to test fly and determine the stall speeds for your individual airplane.

 

Bob P

 

From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of F. Barry Knotts

L-IV-P
  Vs = 80 KIAS, Vso = 71 KIAS.  (Measured by professional test pilot!)  No data on partial flaps.

Barry Knotts

On 8/10/2013 12:02 AM, Paul Miller wrote:

Does anyone have the stall speeds for IV: flaps up versus takeoff flaps?

 

 
--Apple-Mail-E8058BDB-F606-4ED2-B8AD-8B4D987380F3--