X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from outbound-mail02.dca.untd.com ([64.136.47.36] verified) by logan.com (CommuniGate Pro SMTP 6.0c1) with SMTP id 5728474 for flyrotary@lancaironline.net; Sat, 25 Aug 2012 08:24:59 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.136.47.36; envelope-from=alwick@juno.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=juno.com; s=alpha; t=1345897462; bh=47DEQpj8HBSa+/TImW+5JCeuQeRkm5NMpJWZG3hSuFU=; l=0; h=Message-ID:From:To:Subject:Date:Content-Type; b=iD6p7zkATU/HeekafQyGz72RaLcpVu18ruNV/6PXbWe4Tzx9BNuL2dS7RCaG337BD h+IQPlXuCKuDqcetEsV0l3jkHmbRtW5wMCtJpMUMJznmQR4pyD1VytSqZmFlH9Le0/ CPv7eS4vhTENgSa2Z56r2ovANFjSR+3JTahkmwv8= Received: from Penny (50-39-172-134.bvtn.or.frontiernet.net [50.39.172.134]) by smtpout03.dca.untd.com with SMTP id AABJDTS8PAUD4Z8S for (sender ); Sat, 25 Aug 2012 05:23:41 -0700 (PDT) Message-ID: <308E955B0A764CC59F82D8B3B084F63F@Penny> From: "Al Wick" To: "Rotary motors in aircraft" References: In-Reply-To: Subject: Re: [FlyRotary] Re: fuel pump replaced Date: Sat, 25 Aug 2012 05:23:40 -0700 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0310_01CD8281.C9B448C0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Windows Mail 6.0.6002.18197 X-MimeOLE: Produced By Microsoft MimeOLE V6.0.6002.18463 X-UNTD-BodySize: 14385 X-ContentStamp: 32:16:683121492 X-MAIL-INFO:33356d65b4406db454d1f454d121dd1050c97589e42445a951b055b159f949a4858dfd6d2dc93145e5e9c9fdfdfd89319445e95dd4111d15d41185158538451495b55dc1059924308571d5a180f5b5f5a53160040d14c1058444443d4d29d52dcd81e0 X-UNTD-OriginStamp: L941HVjjYzDhN3itp//mkLCYOsk5mmy5kywukE8JlfeOZG2Uhv4wQg== X-UNTD-Peer-Info: 10.171.42.33|smtpout03.dca.untd.com|smtpout03.dca.untd.com|alwick@juno.com This is a multi-part message in MIME format. ------=_NextPart_000_0310_01CD8281.C9B448C0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sorry for not responding earlier, was out of town on 2 back to back = trips.=20
Sorry for not responding earlier, was out of town on 2 back to back = trips.=20
 
<pumps drawing from different levels in the tank, like my = motorcycle=20 does for it reserve
 
Let me clarify. Both of my wet pumps reside at same elevation = inside a 3=20 gallon aluminum tank. When I run one of my wing tanks dry, the = main=20 fuel pump will consume all of the fuel in this sump tank except for appx = 1/2=20 gallon. The engine sputters, I fire up my aux fuel pump, and flow is = immediate=20 to the engine. So I don't have that 9 second delay that others have. = This=20 improves safety.
Pic and more details here:
http://ww= w.ez.org/pages/alwick/index_files/Page467.htm
 
<Yeah, you should be paying attention to fuel management = but this=20 seems like some cheap back up
 
Excellent point! Build system assuming you will experience the same = failures as others have in the past.
My fuel sys addresses all of the most common, high risk failures. = It=20 drives many risks to near zero. For example, fuel clog from debris = is near=20 impossible to occur. Vapor lock near impossible, as the pressure drop at = pump=20 inlet is as low as possible. Running tank dry has the least time delay = to=20 restore fuel. Pump failures less likely, as they are cooled by fuel. It = would be=20 cool if I invented all this, but I just copied the same design = principals used=20 by every single car manufacturer.
 
-al wick
 
 
----- Original Message -----
From:=20 Chris Barber
Sent: Thursday, August 16, 2012 = 9:04=20 AM
Subject: [FlyRotary] Re: fuel = pump=20 replaced

I am using two fuel pumps.  The Aux was always quieter.  = Now they=20 sound about the same.  I guess since, IIRC, the = primary was=20 always louder I "assumed" it was normal and was just limited to the = individual=20 pump.

 

I was just reviewing Al Wick's sight. He hates the rotary (ok, that = may be=20 too strong, but he is not a fan).  He is using a Subaru.  I = was=20 looking at his sump tank.  He is using in the tank pumps, which I = do not=20 wish to do as of right now.  However, something he did which I=20 did kinda like was that he had his pumps drawing = from=20 different levels in the tank, like my motorcycle does for it = reserve. =20 That way, if the primary pumps runs dry, you can switch to the second = pump and=20 have a bit more fuel....hopefully at least enough to pull your head = out and=20 get on the ground.  This seems pretty easy, especially with = inline=20 pumps, to do and like a good idea. Seems as if you would = just have=20 to have one pump out location higher than the other and you have a bit = of a=20 reserve.  Yeah, you should be paying attention to=20 fuel management but this seems like some cheap = back=20 up. However, I could be missing something as = currently I am=20 feeding both pumps from the same outlet. Thoughts?

 

Chris

From: Rotary motors in aircraft=20 [flyrotary@lancaironline.net] on behalf of Bill Bradburry=20 [bbradburry@bellsouth.net]
Sent: Thursday, August 16, 2012 = 10:15=20 AM
To: Rotary motors in aircraft
Subject: = [FlyRotary] Re:=20 fuel pump replaced

Chris,

Is there a = difference=20 in sound between the new pump and the old one you are still = using?  I=20 think that they should both sound the same.  Mine = do.

 

Bill=20 B

 

From: Rotary=20 motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Chris = Barber
Sent: Thursday, August 16, 2012 = 10:43=20 AM
To: Rotary = motors in=20 aircraft
Subject: = [FlyRotary]=20 fuel pump replaced

 

I = replaced my=20 faulty fuel pump.  The new pump is MUCH more quite.  I = suspect the=20 old one was on the way to failure for a while and finally when = belly=20 up.  It was really noisy.  When I took it off I applied = power to=20 both independently and the old one was just plain = dead.

 

I hope I = have=20 addressed the few gremlins that has kept me on the ground the = last few=20 weeks and will get to fly later today.

 

FWIW.

 

Chris=20 Barber

Houston=20 KEFD

Velocity=20 = SE

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