X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 22 Jun 2011 18:56:20 -0400 Message-ID: X-Original-Return-Path: Received: from qmta14.emeryville.ca.mail.comcast.net ([76.96.27.212] verified) by logan.com (CommuniGate Pro SMTP 5.4.0) with ESMTP id 5029165 for lml@lancaironline.net; Wed, 22 Jun 2011 17:02:58 -0400 Received-SPF: pass receiver=logan.com; client-ip=76.96.27.212; envelope-from=jmorgan1023@comcast.net Received: from omta19.emeryville.ca.mail.comcast.net ([76.96.30.76]) by qmta14.emeryville.ca.mail.comcast.net with comcast id z8rn1g0051eYJf8AE92Ms6; Wed, 22 Jun 2011 21:02:21 +0000 Received: from [192.168.1.108] ([71.238.168.79]) by omta19.emeryville.ca.mail.comcast.net with comcast id z92N1g01K1j7MyX0192Pb1; Wed, 22 Jun 2011 21:02:24 +0000 From: Jack Morgan Content-Type: multipart/alternative; boundary=Apple-Mail-3--243142751 Subject: Re: Stall Speeds, Wing Cuffs, Vortex Generators for Lancair 4p X-Original-Date: Wed, 22 Jun 2011 17:02:18 -0400 References: X-Original-To: Lancair Mailing List X-Original-Message-Id: <33082E02-D65A-481D-868E-2B44E0F10B58@comcast.net> Mime-Version: 1.0 (Apple Message framework v1084) X-Mailer: Apple Mail (2.1084) --Apple-Mail-3--243142751 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii > On Jun 21, 2011, at 6:00 AM, Lancair Mailing List wrote: >=20 >>=20 >> From: John Hafen >> Date: June 20, 2011 8:00:14 AM EDT >> To: lml@lancaironline.net >> Subject: Re: [LML] Fw: [LML] Re: Stall Speeds, Wing Cuffs, Vortex = Generators for Lancair 4p >>=20 >>=20 >> Have you ever wondered why they don't make the IVP's any more? >>=20 >> John Hafen >>=20 >>=20 >=20 > I thought it was time to put a few facts into this dead horse = fest....... >=20 > There are more than 600 IV/IV P kits sold and Lancair is maintaining = the molds and a complete parts inventory so they can support this large = fleet. You can buy a piston IV kit from stock if you like for now. >=20 > The current focus at Lancair is the Evolution for the up market and = the various fixed gear derivates of the IV for the market below the very = high end. The IV remains the best speed/efficiency piston aircraft = available but the market for it is very limited as the new aircraft = buyers in this class are settling on turbine solutions which they can = afford. This leaves the IV with a very small market. Lancair will = continue to build piston IV's for those who want them but the low volume = will soon require a higher price which will further shrink the market. = They are not investing in training for their sales/marketing team on the = IV so there is not much mention of it from the sales types. >=20 > The entire speed envelope of the IV remains among the most impressive = engineering accomplishments to date. Particularly impressive is the = stall speed achieved compared to the high cruise cruise speed. Not = surprising, the sink rate increases rapidly as the speed is bled off as = expected for an aircraft of this speed performance. The high sink sets = in well above stall speed which is not a trait GA pilots are used to. = Once the IV pilot understands this condition the airplane handles very = honestly. This is stock and trade for airline pilots as this high sink = characteristic is inherent in the large airliners they fly..... with an = outstanding safety record. The whole thrust of LOBO and the IV drivers = is to urge everyone who flies a IV to get the training required to = safely fly this excellent airplane. >=20 > Enough facts.... now for opinion. >=20 > Anyone who is not comfortable flying an airplane in the IV's class = should not do it. It is not similar to the many slower production = certified/less efficient aircraft around. Those of us who are willing to = understand the trade offs involved sincerely hope that the low speed = characteristics typical of production aircraft are not imposed upon = aircraft like the IV... or airliners for that matter. >=20 > Flying is only safe for those who invest the time to understand the = entire envelope of the aircraft they fly. Unless one has lots of = altitude AND has many hours of aerobatics, the low speed envelope of the = IV should be limited to the onset of stall. The accident rate for the IV = correlates well with the time in type so if you get one...... get the = training. >=20 > Jack Morgan >=20 >=20 >=20 >=20 --Apple-Mail-3--243142751 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=us-ascii



The entire speed envelope of the IV = remains among the most impressive engineering accomplishments to date. = Particularly impressive is the stall speed achieved compared to the high = cruise cruise speed. Not surprising, the sink rate increases rapidly as = the speed is bled off as expected for an aircraft of this speed = performance. The high sink sets in well above stall speed which is not a = trait GA pilots are used to. Once the IV pilot understands this = condition the airplane handles very honestly. This is stock and trade = for airline pilots as this high sink characteristic is inherent in the = large airliners they fly..... with an outstanding safety record. The = whole thrust of LOBO and the IV drivers is to urge everyone who flies a = IV to get the training required to safely fly this excellent = airplane.









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