X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from wa-out-1112.google.com ([209.85.146.183] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2137586 for flyrotary@lancaironline.net; Sun, 24 Jun 2007 13:10:07 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.146.183; envelope-from=wdleonard@gmail.com Received: by wa-out-1112.google.com with SMTP id j4so1518878wah for ; Sun, 24 Jun 2007 10:09:30 -0700 (PDT) DKIM-Signature: a=rsa-sha1; c=relaxed/relaxed; d=gmail.com; s=beta; h=domainkey-signature:received:received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; b=K7QN5A+gtLCgcP2Jw7lDJriImlvd4MmeCKx5HE/Dy9Vclc9hCjQssMC28T4R1Vbf5CeuRtahVVYJif0JkC0kz1IWA7FY8JBu2SHaXAd6sg+q69jJVYJ/Yw4X9u3hWpAOVtT5jaAP7waqrQUhR9+F0imAUrKJqkjmWRadX20Ejro= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:to:subject:in-reply-to:mime-version:content-type:references; b=UeIXcp+8oRAI6vkmMEp84ipSsnslrXuzCAooDq2uFT/9AzNOLtifVMT9mrX2/GIydu51yFnHK32NF2DIOWFelSdKBVMmOVExSE5EZmEu9uBhcKc7O5bTZuxp0ikcA1NcoZZxhF7tidKjWIbxJqESTlj/Z34667NMhVsALU0O2m8= Received: by 10.114.170.1 with SMTP id s1mr4716707wae.1182704970092; Sun, 24 Jun 2007 10:09:30 -0700 (PDT) Received: by 10.114.92.17 with HTTP; Sun, 24 Jun 2007 10:09:30 -0700 (PDT) Message-ID: <1c23473f0706241009i7153a0f5h381cb797311100a4@mail.gmail.com> Date: Sun, 24 Jun 2007 10:09:30 -0700 From: "David Leonard" To: "Rotary motors in aircraft" Subject: Re: [FlyRotary] Re: Favored Method 7/8 - Fuel Pump Shut off was [FlyRotary] Re: Method of killing power?? In-Reply-To: MIME-Version: 1.0 Content-Type: multipart/related; boundary="----=_Part_168714_5096317.1182704970032" References: ------=_Part_168714_5096317.1182704970032 Content-Type: multipart/alternative; boundary="----=_Part_168713_19789172.1182704970032" ------=_Part_168713_19789172.1182704970032 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: quoted-printable Content-Disposition: inline Interesting, never thought of the possibility. I have not noted an issue with fuel boiling despite a very high temp heat source from the turbo. There is usually a few psi of pressure left in the system, and I have never seen it climb back up (due to boiling). Perhaps that few psi is enough to prevent loss to vapor. Dave Leonard On 6/24/07, Ben Baltrusaitis wrote: > > Won't shutting down with the fuel pump tend to boil the remaining fuel i= n > the lines because it is at a lower pressure and subjected to high heat > sink? Couldn't that lead to gummed up injectors from the residue left? > Ben > > ----- Original Message ----- > *From:* Ed Anderson > *To:* Rotary motors in aircraft > *Sent:* 06/24/2007 12:27 PM > *Subject:* [FlyRotary] Favored Method 7/8 - Fuel Pump Shut off was > [FlyRotary] Re: Method of killing power?? > > > > > > Ok, heard from a couple more, the count now is out of 8 respondents > (including yours truly), it looks like the methods of engine shut down > are: > > 7 - turn off fuel pumps > 1- Disable injectors > > And the "Winnnaahhh" is Fuel-Pump shut off! > > Well, being "Plugs Up" has already endured me to being a part of a > minority, so I can accept it the rest of you choose to be different {:>). > > Since flooding in my configuration ("Plugs Up") is something of little > consequence (but, leaking injectors have bugged me in the past) - I will > stick with what has worked for me. > > Thanks for participating in our little informal survey > > Ed > > *en=B7dure *(n-dr, -dyr) *v.* *en=B7dured*, *en=B7dur=B7ing*, *en=B7dures= * > *v.**tr.* *1. *To carry on through, despite hardships; undergo: *endure a= n > Arctic winter.* > *2. *To bear with tolerance: *"We seek the truth, and will endure the > consequences"* *Charles Seymour.* See *v.**intr.* > *1. *To continue in existence; last: *buildings that have endured for > centuries.* > *2. *To suffer patiently without yielding. > > ----- Original Message ----- > > *From:* James Maher > *To:* Rotary motors in aircraft > *Sent:* Sunday, June 24, 2007 10:35 AM > *Subject:* [FlyRotary] Re: Method of killing power?? > > > Ed, > I prefer the Fuel Pump shutoff method. > On my airplane the fuel system will remain pressurized for a long time > after shut down. > I don't like the idea of highly pressurized fuel inside a very hot engine > compartment. > So by turning off the fuel pumps with the engine still running it serves > to de-pressurize the fuel system. > This way if you do happen to get a stuck open injector it will not flood > the rotor housing with fuel. > It only takes a second or two for the engine to quit after fuel pump > shutoff. > Jim > > *Ed Anderson * wrote: > > *To everyone running a rotary engine and particularly flying with one - > what is your normal method of killing the engine.* > > 1. Turning off Main Power > 2. Turning off EC2 Power > 3. Turning off ignition > 4. Turning off Fuel Pumps > 5. Turning off injectors > 6. Other > Ed Anderson > Rv-6A N494BW Rotary Powered > Matthews, NC > eanderson@carolina.rr.com > http://members.cox.net/rogersda/rotary/configs.htm#N494BW > http://www.dmack.net/mazda/index.html > > > ------------------------------ > > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.5.472 / Virus Database: 269.9.6/865 - Release Date: 6/24/2007 > 8:33 AM > > --=20 David Leonard Turbo Rotary RV-6 N4VY http://N4VY.RotaryRoster.net http://RotaryRoster.net ------=_Part_168713_19789172.1182704970032 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Content-Disposition: inline
Interesting, never thought of the possibility.  I have not noted = an issue with fuel boiling despite a very high temp heat source&n= bsp;from the turbo.   There is usually a few psi of pressure left= in the system, and I have never seen it climb back up (due to boiling).&nb= sp; Perhaps that few psi is enough to prevent loss to vapor.
 
Dave Leonard

 
On 6/24/07, = Ben Baltrusaitis <ben@pa.met= rocast.net> wrote:
Won't sh= utting down with the fuel pump tend to boil the remaining fuel in the = lines because it is at a lower pressure and subjected to high heat sin= k?  Couldn't that lead to gummed up injectors from the residue lef= t?
Ben
----- Original Message -----
Sent: 06/24/2007 12:27 PM
Subject: [FlyRotary] Favored Method = 7/8 - Fuel Pump Shut off was [FlyRotary] Re: Method of killing power??

 
 

 
Ok, heard from a couple more, the count now = is  out of 8 respondents (including yours truly), it looks like t= he methods of engine shut down
 are:
 
7 - turn off fuel pumps
1- Disable injectors
 
And the "Winnnaahhh" is Fuel-Pump shut = off!
 
Well, being "Plugs Up" has already= endured me to being a part of a minority, so I can accept it the rest of y= ou choose to be different {:>). 
 
Since flooding in my configuration ("Plugs U= p")  is something of little consequence (but, leaking injectors h= ave bugged me in the past) - I will stick with what has worked for me. = ;
 
Thanks for participating in our little informal s= urvey
 
Ed
 
en=B7dure (n-dr , -dyr)=20
v. en=B7dured, en=B7dur=B7ing, en=B7dures =
v.tr.=20
1. To carry on through, despite hardships; undergo: <= font color=3D"#226699">endure an Arctic winter.
2. To bear with tolerance: &q= uot;We seek the truth, and will endure the consequences" Charles Seymour. See  v.intr.
1. To continue in existence; last: buildings that have endured for centuries.
2. To suffer patiently without yielding.
 ----- Original Message -----
Sent: Sunday, June 24, 2007 10:35 AM=
Subject: [FlyRotary] Re: Method of k= illing power??

 
Ed,
I prefer the Fuel Pump shutoff method.
On my airplane the fuel system will remain pressurized for a long time= after shut down.
I don't like the idea of highly pressurized fuel inside a very hot= engine compartment.
So by turning off the fuel pumps with the engine still running it serv= es to de-pressurize the fuel system.
This way if you do happen to get a stuck open injector it will not flo= od the rotor housing with fuel.
It only takes a second or two for the engine to quit after fuel pump s= hutoff.
Jim

Ed Anderson <eanderson@carolina.rr.com> wrote:
To everyone running a rotary engine and particular= ly flying with one - what is your normal method of killing the engine.
 
1.  Turning off Main Power=
2.  Turning off EC2 Power<= /div>
3.  Turning off ignition
4.  Turning off Fuel Pumps=
5.  Turning off injectors<= /div>
6.  Other

No virus found in this incoming message.
Checked by AVG Free Edit= ion.
Version: 7.5.472 / Virus Database: 269.9.6/865 - Release Date: 6/2= 4/2007 8:33 AM




= --
David Leonard

Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
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