X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Fri, 08 Feb 2008 15:13:56 -0500 Message-ID: X-Original-Return-Path: Received: from elasmtp-galgo.atl.sa.earthlink.net ([209.86.89.61] verified) by logan.com (CommuniGate Pro SMTP 5.2.0) with ESMTP id 2720472 for lml@lancaironline.net; Fri, 08 Feb 2008 00:52:37 -0500 Received-SPF: none receiver=logan.com; client-ip=209.86.89.61; envelope-from=douglasbrunner@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=eEAfRQ3itKpOx1LxI3lfBw58NszAeURwmy4ueIx0CsOOTM1rTTZKozcVMxBHN5yq; h=Received:Message-ID:From:To:Subject:Date:MIME-Version:Content-Type:X-Priority:X-MSMail-Priority:X-Mailer:X-MimeOLE:X-ELNK-Trace:X-Originating-IP; Received: from [74.93.196.177] (helo=DFWK3391) by elasmtp-galgo.atl.sa.earthlink.net with asmtp (Exim 4.34) id 1JNM9W-0001vc-Hl for lml@lancaironline.net; Fri, 08 Feb 2008 00:51:58 -0500 X-Original-Message-ID: <000801c86a16$baf65630$1bd0a60a@DFWK3391> From: "Douglas Brunner" X-Original-To: "Mailing List Lancair" Subject: De-Iced Legacy X-Original-Date: Fri, 8 Feb 2008 00:52:03 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0005_01C869EC.D1D191F0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3198 X-ELNK-Trace: ad85a799c4f5de37c2eb1477c196d22294f5150ab1c16ac04d04932202c5b85b2a12b37fc3e56719b384bd59dfec51e0350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 74.93.196.177 This is a multi-part message in MIME format. ------=_NextPart_000_0005_01C869EC.D1D191F0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Recently, the folks at RDD finished installing a Therm-X de-icing system = on N241DB, making it the first de-iced Legacy. =20 The system includes an airframe de-ice system, a prop de-ice system and = windscreen de-ice. The Therm-X system relies on a large alternator (100 = amps at 70 volts), controlled by a solid state controller to heat tapes = on the leading edges of the wing and h. stab. These are cycled = automatically when temperatures drop into the icing range. Prop de-ice = is done by heated boots, windscreen de-ice uses a pump to spray de-ice = fluid. For more info go to: http://www.rddent.com/products.html=20 =20 I had the opportunity to inadvertently test the system today on a trip = from Chattanooga to Tri-Cities TN. There was no ice forecast, but on = our approach to Tri-Cities we had to come down through a thin cloud = layer. Above the clouds we were in the bright sunlight well above = freezing, but coming through the clouds the temperature dropped below = freezing and we started to accumulate some rime ice. We watched as the = system "zapped" the ice off the wing - very impressive. =20 There are a couple of "costs" to the system in addition to the price = (contact RDD for pricing). The system weighs about 40 lbs and because = of the position of the alternator (belt driven off the L front of the = engine) the ram air needs to be reversed. The system also caused a loss = of about 6 knots; 3 from the airframe and 3 from the prop. On the plus = side the heaters protect the wing and h. stab against chipping and rain = erosion. =20 The system is not approved for known ice, but does allow more time to = escape from inadvertent encounters with icing (of which I have had a = number). I think it adds substantially to the cross country capability = of the Legacy. =20 D. Brunner N241DB ------=_NextPart_000_0005_01C869EC.D1D191F0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Recently, the folks at RDD finished installing a Therm-X = de-icing system=20 on N241DB, making it the first de-iced Legacy.

The system includes an airframe de-ice system, a prop de-ice = system and=20 windscreen de-ice. The = Therm-X=20 system relies on a large alternator (100 amps at 70 volts), controlled = by a=20 solid state controller to heat tapes on the leading edges of the wing = and h.=20 stab. These are cycled=20 automatically when temperatures drop into the icing range. Prop de-ice is done by heated = boots,=20 windscreen de-ice uses a pump to spray de-ice fluid. For more info go to: http://www.rddent.com/products.html

I had the opportunity to inadvertently test the system today on = a trip=20 from Chattanooga to Tri-Cities TN. There was no ice forecast, but = on our=20 approach to Tri-Cities we had to come down through a thin cloud = layer. Above the clouds we were in = the bright=20 sunlight well above freezing, but coming through the clouds the = temperature=20 dropped below freezing and we started to accumulate some rime ice. We watched as the system = =93zapped=94 the=20 ice off the wing =96 very impressive.

There are a couple of =93costs=94 to the system in addition to = the price=20 (contact RDD for pricing). = The=20 system weighs about 40 lbs and because of the position of the alternator = (belt=20 driven off the L front of the engine) the ram air needs to be = reversed. The system also caused a loss = of about 6=20 knots; 3 from the airframe and 3 from the prop. On the plus side the heaters = protect the=20 wing and h. stab against chipping and rain erosion.

The system is not approved for known ice, but does allow more = time to=20 escape from inadvertent encounters with icing (of which I have had a=20 number). I think it adds=20 substantially to the cross country capability of the Legacy.

D. Brunner N241DB

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