X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from nm18-vm0.bullet.mail.sp2.yahoo.com ([98.139.91.214] verified) by logan.com (CommuniGate Pro SMTP 5.4.1) with SMTP id 5100051 for flyrotary@lancaironline.net; Mon, 22 Aug 2011 12:35:50 -0400 Received-SPF: none receiver=logan.com; client-ip=98.139.91.214; envelope-from=roundrocktom@yahoo.com Received: from [98.139.91.69] by nm18.bullet.mail.sp2.yahoo.com with NNFMP; 22 Aug 2011 16:35:17 -0000 Received: from [98.139.91.17] by tm9.bullet.mail.sp2.yahoo.com with NNFMP; 22 Aug 2011 16:35:17 -0000 Received: from [127.0.0.1] by omp1017.mail.sp2.yahoo.com with NNFMP; 22 Aug 2011 16:35:17 -0000 X-Yahoo-Newman-Property: ymail-3 X-Yahoo-Newman-Id: 296999.27327.bm@omp1017.mail.sp2.yahoo.com Received: (qmail 61995 invoked by uid 60001); 22 Aug 2011 16:35:16 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1314030916; bh=JareAPiCjA/GiHFCLl27JLucyZriJwlo4FlPBNPt694=; h=X-YMail-OSG:Received:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=gnny2Wj6zgEfJhqwi3zCKyrQPp88dwtfoajYqzyOSifuXULy44IzGzek6EuQZpjLpedq7fF6WySxJ7jaf4Ywgst0GRqH2mXRBors1A6DRx8frqArhN5ASB/HB5za/5IAaqEEHNp5otP3dixWMTVADa724hetxPoEhpZdOelHEuU= DomainKey-Signature:a=rsa-sha1; q=dns; c=nofws; s=s1024; d=yahoo.com; h=X-YMail-OSG:Received:X-Mailer:References:Message-ID:Date:From:Reply-To:Subject:To:In-Reply-To:MIME-Version:Content-Type; b=H+cvo2SwNjhBxIUe3GyWOn55Uh3+or2iAMlBAexuZ0ScNWdHGd3+JdPbqLeQozs0NXpjCZOQS7a0xWmsuLSKO8PNwAwLbmVHP1VrRk17Q16uffENWbs8+t4sFT5Ad6VCy30L4OtHe7N1Hk5qu13hATKDyQ5Zvezwapai0qL/kGo=; X-YMail-OSG: FMPa47sVM1mT8BaudJKLkd5ObJ489eHJSr8p9R5EIw8phn0 sY.psBz_mUPCs8UQY3UYiGREptaeghFO4V5OeqpueQCQWrbVF9srIuiQ5A_S tEB39ayOAdCR5FX6QHq5TbWu56ZT.AqGQWdAxoxMeud996iq4ivpwVgCkfQj RRVCgKnO12oBjjMMrx3pX7jJ84WARaNOY.jH5E9rM5gqgc1YqBvM_JMy1KJm 0jvdrZVCeW9OyEXxJCL1LSIdzJfySnWrqIeZRpWqRZESsxcs64kBfYHT3RyV swbqU73ukwmsDy3VpmmmryDZQYXmC.YGoSyfCRJr_LCZqQu2ksLkS84.cIp4 GQ.ly_.mZ6DoYqWlDPuDW1reKiGEjIwh_W_WQv7sPUv22kgw30DJspYunsFa WQzdH7JwgZXnD6kXVhp6CQKxfag1lHMEWbrnMIDsXOtZZXbzsfPVcp2ebwIJ dog9g_8Z1p9bFxK42bQItIPsDyS9DS9fpIqQMA1F3dWlFS61npfLvHHcgekf xX6vhWBD3ixb4T2DpFDk- Received: from [216.52.185.73] by web111508.mail.gq1.yahoo.com via HTTP; Mon, 22 Aug 2011 09:35:16 PDT X-Mailer: YahooMailWebService/0.8.113.315625 References: Message-ID: <1314030916.45192.YahooMailNeo@web111508.mail.gq1.yahoo.com> Date: Mon, 22 Aug 2011 09:35:16 -0700 (PDT) From: Tom Walter Reply-To: Tom Walter Subject: Re: [FlyRotary] Re: Batteries To: Rotary motors in aircraft In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-1148666064-384219508-1314030916=:45192" ---1148666064-384219508-1314030916=:45192 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable Joe,=0A=0AWhich Bob Knuckles system?=A0 Z19?=0A=0AI realize Ed is happy wit= h one battery, but I like two batteries.=A0 TheTHUNK of relays all popping = open and the realization of "I turned off the alternator,and voltage droppe= d way too low.... followed with LAND NOW!" would have convinced Ed tohave p= ut the second battery back in! It sure got my attention on why two batterie= s is a good thing!(Great Story, but I'll let Ed tell it!)=0A=0A=0ASo two ba= tteries, and a BIG RED LIGHT with "low voltage" will go on my panel.=0AI di= d the spread sheet with 17AH batteries and flying time. Add in Night, and n= oplace to easily land.... two batties seem like a good trade off.=A0 My big= gest shockwas the FORD style contactor needed 1Amp draw to remain closed.= =A0 Shutting down nonessential, but leaving contactors, PDF, ECU and coils.= ...=A0=A0 System draw is around 15 Amps. 17AHimplies you'd have an hour, bu= t at 15Amp draw... more like 30-40 minutes, hence two batteriesas 1 hour fl= ying time makes finding a landing strip a little easier.=A0 =0A=0ATom=0A=0A= =0A=0A________________________________=0AFrom: Ed Anderson =0ATo: Rotary motors in aircraft = =0ASent: Monday, August 22, 2011 11:20 AM=0ASubject: [FlyRotary] Re: Batter= ies=0A=0AJoe, I started out using two Concord 25AH RGB each weighing 22 lbs= for a total of over 44 lbs of battery (some joked I could get home by usin= g the start to crank the prop {:>)) !=A0 I then transition to two Odyssey = PC-680 17AH batteries each weighing 14 lbs for a total of 28 lbs.=A0 Then a= fter 6 years of flying with two batteries and never using the second one - = except to help crank on a cold morning, I removed one of them.=A0 Have now = been flying for over 4-5 years with one Odyssey 14lbs.=A0 I swap it out eve= ry two years.=0A=0AEd=0A=0A------------------------------------------------= --=0AFrom: =0ASent: Monday, August 22, 2011 11:59= AM=0ATo: "Rotary motors in aircraft" =0ASubje= ct: [FlyRotary] Batteries=0A=0A> What size an type of batteries are require= d for the rotary?=A0 I am leaning toward using 2 batteries and use Bob Nuck= ols system.=A0 Thanks for any help.=0A> =0A> Joe Berki=0A> Limo EZ=0A> =0A>= --=0A> Homepage:=A0 http://www.flyrotary.com/=0A> Archive and UnSub: http:= //mail.lancaironline.net:81/lists/flyrotary/List.html =0A=0A=0A--=0AHomepag= e:=A0 http://www.flyrotary.com/=0AArchive and UnSub:=A0 http://mail.lancair= online.net:81/lists/flyrotary/List.html ---1148666064-384219508-1314030916=:45192 Content-Type: text/html; charset=iso-8859-1 Content-Transfer-Encoding: quoted-printable
Joe,

Which Bob Knuckle= s system?  Z19?

I r= ealize Ed is happy with one battery, but I like two batteries.  The THUNK of relays all popping open and the realization of "I turne= d off the alternator, and voltage dropped way too low.... foll= owed with LAND NOW!" would have convinced Ed to have put the s= econd battery back in! It sure got my attention on why two batteries is a g= ood thing!(Great Story, but I'll let Ed tell it!)

So two batteries, and a BIG RED = LIGHT with "low voltage" will go on my panel.

I did the spread sheet with 17AH batteries and flying time. Add in Night, and no place to easily land.... two batti= es seem like a good trade off.  My biggest shock was the = FORD style contactor needed 1Amp draw to remain closed.  Shutting down= non essential, but leaving contactors, PDF, ECU and coils....=    System draw is around 15 Amps. 17AH implies you'd= have an hour, but at 15Amp draw... more like 30-40 minutes, hence two batt= eries as 1 hour flying time makes finding a landing strip a li= ttle easier. 

Tom

From: Ed Anderson <eanderson@carolina= .rr.com>
To: Rotary = motors in aircraft <flyrotary@lancaironline.net>
Sent: Monday, August 22, 2011 11:20 AM
Subject: [FlyRotary] Re: Batterie= s

Joe, I started out using two Concord 25AH RGB each weighing= 22 lbs for a total of over 44 lbs of battery (some joked I could get home = by using the start to crank the prop {:>)) !  I then transition to= two Odyssey PC-680 17AH batteries each weighing 14 lbs for a total of 28 l= bs.  Then after 6 years of flying with two batteries and never using t= he second one - except to help crank on a cold morning, I removed one of th= em.  Have now been flying for over 4-5 years with one Odyssey 14lbs.&n= bsp; I swap it out every two years.

Ed

----------------------= ----------------------------
From: <jskmberki@windstream.net><= br>Sent: Monday, August 22, 2011 11:59 AM
To: "Rotary motors in aircraft= " <flyrotary@lancaironline.net>
Subject: [F= lyRotary] Batteries

> What size an type of batteries are required= for the rotary?  I am leaning toward using 2 batteries and use Bob Nu= ckols system.  Thanks for any help.
>
> Joe Berki
>= Limo EZ
>
> --
> Homepage:  http://www.flyrotary.com/
> Arc= hive and UnSub: http://mail.lancaironline.net:81/lists/flyrot= ary/List.html


--
Homepage:  http://www.flyrotary.com/
Archive a= nd UnSub:  http://mail.lancaironline.net:81/lists/flyrota= ry/List.html


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