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Date: Wed, 22 Dec 2004 18:42:19 -0500
From: Joe <jewen@comporium.net>
Subject: Re: [FlyRotary] Re: Fuel pump question.
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
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References: <list-577407@logan.com>

Ed,
Thanks, just after I hit the send button I thought of the reason for both to
be on.
Joe.

----- Original Message ----- 
From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Sent: Wednesday, December 22, 2004 6:36 PM
Subject: [FlyRotary] Re: Fuel pump question.


> Joe, the principal reason for using both pumps on take-off and Landing is
> should one fail, the time it takes to recognize the problem, decided what
> has caused it and take corrective action (turn on the other pump),
precious
> seconds can be lost.   Which if you are close to the ground can made a
> crucial difference in the out come.   I strongly recommend running both
> pumps for such critical phases of flight - you can turn one off when you
> reach a comfortable altitude (or have landed).
>
> Ed Anderson
>
> ----- Original Message -----
> From: "Joe" <jewen@comporium.net>
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Sent: Wednesday, December 22, 2004 6:08 PM
> Subject: [FlyRotary] Re: Fuel pump question.
>
>
> > Dana,
> > I do not know of a reason to use both pumps at the same time.  My
thoughts
> > on this subject are directed to the electrical.  If you use an single
> switch
> > it may have the effect of reducing redundancy.  While redundancy exists
> for
> > the pump the wiring will not be fully redundant.  The CB and wiring to
the
> > common of your switch will serve both pumps and a failure in the CB,
> switch,
> > or lead in wiring will render both pumps inoperative.  My current plans
> call
> > for 2 batteries, each pump, ECU supply, Coil supply etc. from each of
the
> > batteries.
> > Joe
> > ----- Original Message -----
> > From: "Dana Overall" <bo124rs@hotmail.com>
> > To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> > Sent: Tuesday, December 21, 2004 8:39 PM
> > Subject: [FlyRotary] Fuel pump question.
> >
> >
> > > Man am I ever going to expose my serious lack of electrical knowledge
> > > here:-)  I'm planning on using a single pole double throw switch to
> > activate
> > > one or the other fuel pump, but not both.  Is there ever any reason to
> > have
> > > both pumps on at the same time??
> > >
> > >
> > >
> > > Dana Overall
> > > Richmond, KY i39
> > > RV-7 slider, Imron black, "Black Magic"
> > > Finish kit
> > > 13B Rotary. Hangar flying my Dynon.
> > > http://rvflying.tripod.com
> > > http://rvflying.tripod.com/blackrudder.jpg
> > > do not archive
> > >
> > >
> > >
> > > >>  Homepage:  http://www.flyrotary.com/
> > > >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
> > >
> >
> >
> >
> > >>  Homepage:  http://www.flyrotary.com/
> > >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>
>
>
> >>  Homepage:  http://www.flyrotary.com/
> >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html
>