X-Virus-Scanned: clean according to Sophos on Logan.com X-SpamCatcher-Score: 42 [XX] Return-Path: Received: from mtiwmhc13.worldnet.att.net ([204.127.131.117] verified) by logan.com (CommuniGate Pro SMTP 5.1.3) with ESMTP id 1696110 for flyrotary@lancaironline.net; Wed, 20 Dec 2006 18:21:36 -0500 Received-SPF: none receiver=logan.com; client-ip=204.127.131.117; envelope-from=keltro@att.net Received: from mwebmail21.att.net ([204.127.135.60]) by worldnet.att.net (mtiwmhc13) with SMTP id <20061220232038113003ffare>; Wed, 20 Dec 2006 23:20:48 +0000 Received: from [64.250.199.83] by mwebmail21.att.net; Wed, 20 Dec 2006 23:20:38 +0000 From: keltro@att.net (Kelly Troyer) To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: aluminum fuel tank in composite structure Date: Wed, 20 Dec 2006 23:20:38 +0000 Message-Id: <122020062320.11830.4589C544000F0FEB00002E362160383116019D9B040A05@att.net> X-Mailer: AT&T Message Center Version 1 (Jul 31 2006) X-Authenticated-Sender: a2VsdHJvQGF0dC5uZXQ= MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="NextPart_Webmail_9m3u9jl4l_11830_1166656838_0" --NextPart_Webmail_9m3u9jl4l_11830_1166656838_0 Content-Type: text/plain Content-Transfer-Encoding: 8bit Ernest, I am not am engineer but in my mind lowering the vertical CG would improve lateral / roll stability.........Plus my saddle tanks get wider as they go to the rear from the main spar effectively moving fuel weight slightly more aft and helping the Delta problem of being more nose heavy as fuel is burned off........IMHO -- Kelly Troyer Dyke Delta/13B/RD1C/EC2/EM2 Mistral Backplate -------------- Original message from Ernest Christley : -------------- > Lehanover@aol.com wrote: > > > In a message dated 12/19/2006 9:41:37 A.M. Eastern Standard Time, > > echristley@nc.rr.com writes: > > > > I'm working on a design for an aluminum fuel tank to go in my Delta. > > It's a modification to the plans, so I'd like to do as much > > copying and > > as little 'designing' as possible. Does anyone know of existing > > examples of aluminum tanks inbedded in composite structures? > > > > I have a set of Delta plans, and was thinking more like a 22 gallon > > racing fuel cell in each stub wing rather than behind my package shelf. > > > > Lynn E. Hanover > > Very good point. I believe that Kelly has a setup like that. I'm not > fond of the idea, because: > > -it will cause a substantial shift in the vertical CG. The result will > possibly be undectable, but not something that I'm comfortable gambling on. > -it will move away from the single-tank fuel management simplicity. > Everything I've heard puts the number of deaths attributed to > mismanagement of available fuel far above those attributed to damaged tanks. > > The plus side of the fuel cell solution would be that there are very > high quality units available commercially that could be easily bolted on. > > -- > ,|"|"|, Ernest Christley | > ----===<{{(oQo)}}>===---- Dyke Delta Builder | > o| d |o http://ernest.isa-geek.org | > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/ --NextPart_Webmail_9m3u9jl4l_11830_1166656838_0 Content-Type: text/html Content-Transfer-Encoding: 8bit

Ernest,

I am not am engineer but in my mind lowering the vertical CG would

improve lateral / roll stability.........Plus my saddle tanks get wider as they

go to the rear from the main spar effectively moving fuel weight slightly

more aft and helping the Delta problem of being more nose heavy as fuel

is burned off........IMHO

--
Kelly Troyer
Dyke Delta/13B/RD1C/EC2/EM2
Mistral Backplate

-------------- Original message from Ernest Christley <echristley@nc.rr.com>: --------------

> Lehanover@aol.com wrote:
>
> > In a message dated 12/19/2006 9:41:37 A.M. Eastern Standard Time,
> > echristley@nc.rr.com writes:
> >
> > I'm working on a design for an aluminum fuel tank to go in my Delta.
> > It's a modification to the plans, so I'd like to do as much
> > copying and
> > as little 'designing' as possible. Does anyone know of existing
> > examples of aluminum tanks inbedded in composite structures?
> >
> > I have a set of Delta plans, and was thinking more like a 22 gallon
> > racing fuel cell in each stub wing rather than behind my package shelf.
> >
> > Lynn E. Hanover
>
> Very good point. I believe that Kelly has a setup like that. I'm not
> fond of the idea, because:
>
> -it will cause a substantial shift in the vertical CG. The result will
> possibly be undectable, but not something that I'm comfortable gambling on.
> -it will move away from the single-tank fuel management simplicity.
> Everything I've heard puts the number of deaths attributed to
> mismanagement of available fuel far above those attributed to damaged tanks.
>
> The plus side of the fuel cell solution would be that there are very
> high quality units available commercially that could be easily bolted on.
>
> --
> ,|"|"|, Ernest Christley |
> ----===<{{(oQo)}}>===---- Dyke Delta Builder |
> o| d |o http://ernest.isa-geek.org |
>
> --
> Homepage: http://www.flyrotary.com/
> Archive and UnSub: http://mail.lancaironline.net/lists/flyrotary/

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