X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 19 Dec 2007 01:32:11 -0500 Message-ID: X-Original-Return-Path: Received: from [64.12.137.3] (HELO imo-m22.mail.aol.com) by logan.com (CommuniGate Pro SMTP 5.2c1) with ESMTP id 2604660 for lml@lancaironline.net; Tue, 18 Dec 2007 23:41:05 -0500 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.3; envelope-from=PTACKABURY@aol.com Received: from PTACKABURY@aol.com by imo-m22.mx.aol.com (mail_out_v38_r9.3.) id q.c1f.2688fa29 (32913) for ; Tue, 18 Dec 2007 23:40:22 -0500 (EST) From: PTACKABURY@aol.com X-Original-Message-ID: X-Original-Date: Tue, 18 Dec 2007 23:40:22 EST Subject: Re: [LML] Re: Skoppe lancair 4 pt X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1198039222" X-Mailer: AOL 9.0 VR sub 5006 X-Spam-Flag: NO -------------------------------1198039222 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en =20 In a message dated 12/18/2007 3:11:34 P.M. Pacific Standard Time, =20 VTAILJEFF@aol.com writes: Do you not consider a second independent EFIS with it=E2=80=99s own ADAHRS=20= as=20 sufficient backup =20 Not a simple question--depends on the power distribution design concept. M= y=20 first reaction is to suggest you consider the common elements between the=20 two EFISs--and that would seem to be only the pitot static system since the= =20 Dynon has its own separate battery. When I designed my electrical system I= =20 started with an all electric objective and did all I could to include simpl= icity=20 as well as redundancy to keep the motor running. For a number of reasons=20 that resulted in two Odyssey batteries and one alternator. Then I added a=20 Chelton Pro--a certified EFIS. So I felt comfy I had a good AHARS and two=20= high=20 quality displays with redundancy. To provide a backup for the 2% of the ti= me I=20 am in real IFR I decided a Dynon was the cost effective answer--I just coul= d=20 not imagine a failure mode that would leave the motor running and kill both= =20 EFISs. But maybe your imagine is different than mine. paul--LIV N94PT **************************************See AOL's top rated recipes=20 (http://food.aol.com/top-rated-recipes?NCID=3Daoltop00030000000004) -------------------------------1198039222 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en
In a message dated 12/18/2007 3:11:34 P.M. Pacific Standard Time,=20 VTAILJEFF@aol.com writes:
<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000080 size= =3D2>Do you not cons= ider a=20 second independent EFIS with it=E2=80=99s own ADAHRS as sufficient backup=20
Not a simple question--depends on the power distribution design=20 concept.  My first reaction is to suggest you consider the common eleme= nts=20 between the two EFISs--and that would seem to be only the pitot static syste= m=20 since the Dynon has its own separate battery.  When I designed my=20 electrical system I started with an all electric objective and did all I cou= ld=20 to include simplicity as well as redundancy to keep the motor running. = For=20 a number of reasons that resulted in two Odyssey batteries and one=20 alternator.  Then I added a Chelton Pro--a certified EFIS.  So I f= elt=20 comfy I had a good AHARS and two high quality displays with redundancy. = ; To=20 provide a backup for the 2% of the time I am in real IFR I decided a Dynon w= as=20 the cost effective answer--I just could not imagine a failure mode that woul= d=20 leave the motor running and kill both EFISs.  But maybe your imagine is= =20 different than mine.
paul--LIV N94PT



See A= OL's top rated recipes and easy ways to stay in shape for winter.
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