X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Thu, 09 Sep 2010 07:53:50 -0400 Message-ID: X-Original-Return-Path: Received: from hrndva-omtalb.mail.rr.com ([71.74.56.123] verified) by logan.com (CommuniGate Pro SMTP 5.3.9) with ESMTP id 4459805 for lml@lancaironline.net; Wed, 08 Sep 2010 16:19:02 -0400 Received-SPF: pass receiver=logan.com; client-ip=71.74.56.123; envelope-from=sdfields@austin.rr.com X-Original-Return-Path: X-Authority-Analysis: v=1.1 cv=2UVid5d+x37NY9sg6AthlbJk7luIC5bYp3eyRq7Iv0o= c=1 sm=0 a=neIxlP908dgA:10 a=y1NsIjGapqjWwHRqE61VCQ==:17 a=XMy9Kcj8AAAA:8 a=Ia-xEzejAAAA:8 a=Ma-9e1RPLIvojLuGjW4A:9 a=R-PnFFCPV_Lqlyl0mkAA:7 a=_tsCZ8SdKrl3D6J0y7M_0_uGLkEA:4 a=wPNLvfGTeEIA:10 a=QJIP64lGCh4A:10 a=EzXvWhQp4_cA:10 a=M_U-k_cauhPtrEyc:21 a=Jb_AgEyXJoKaCd4J:21 a=yMhMjlubAAAA:8 a=SSmOFEACAAAA:8 a=yZG0XrTE9brWX7W1YlEA:9 a=dFJMleIu8wZf9ev-hpYA:7 a=njFWkeN8m_QXo9uXzq7tnpIg1KoA:4 a=y1NsIjGapqjWwHRqE61VCQ==:117 X-Cloudmark-Score: 0 X-Originating-IP: 66.68.64.81 Received: from [66.68.64.81] ([66.68.64.81:3613] helo=D6F15391) by hrndva-oedge03.mail.rr.com (envelope-from ) (ecelerity 2.2.2.39 r()) with ESMTP id F1/39-06929-19FE78C4; Wed, 08 Sep 2010 20:18:25 +0000 From: "Stan Fields" X-Original-To: "'Lancair Mailing List'" References: In-Reply-To: Subject: RE: [LML] Dukes fuel pump problem follow-up X-Original-Date: Wed, 8 Sep 2010 15:16:32 -0500 X-Original-Message-ID: <004e01cb4f92$bb1d7300$31585900$@rr.com> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_004F_01CB4F68.D2476B00" X-Mailer: Microsoft Office Outlook 12.0 Thread-Index: ActPbVXRUzcdWnrsQpmRTBO9EP2+4wAJB5zQ Content-Language: en-us This is a multipart message in MIME format. ------=_NextPart_000_004F_01CB4F68.D2476B00 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Thanks Russell, =20 I am just now installing the Dukes pump and noticed the warning about intermittent use. This concerns me because over the last few weeks I=92ve followed the chat strings discussing flight procedures where the Low Boost was left on as a normal procedure. Seems like a potential problem. But then again the tolerance on most of these components is so large that I thought perhaps continuous Low Boost must be OK.=20 =20 Does the Weldon pump have both low and high boost. How does it compare in price to the $960 Duke. I waited over a year for this pump through Lancair and finally bough one from a builder. =20 Regards Stan Fields=20 Legacy #201 www.lancairlegacybuilder.com =20 =20 From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Russell Sent: Wednesday, September 08, 2010 10:49 AM To: lml@lancaironline.net Subject: [LML] Dukes fuel pump problem follow-up =20 Everyone thanks for your response. =20 After lengthy evaluation and communications with Dukes and CJ aviation I have learned the following. =20 The Dukes pump is designed for =93intermittent duty only=94 and is not a se= lf priming pump. It does not have a thermal overload relay. I also found out that the tolerances in the pump are not well controlled. =20 Unfortunately I have been unable to reproduce the failure that I experience= d last week. All electrical connections check out properly. The aircraft only has 140 hours on it. =20 I have decided to replace the Dukes pump with a Weldon pump. =20 The Weldon pump is designed for =93continuous duty=94 and is self priming. = These are two big advantages over the Dukes. Also the tolerances are well controlled. =20 I have ordered the Weldon pump with electronic controller from CJ Aviation. I will have the pump by the beginning of next week. Which is a much better delivery time than getting a Dukes. =20 =20 Regards Russell Steiner N2AA, legacy =20 original posting. Has anybody run into this problem? Yesterday after flying into a field the Dukes of electric fuel pump would not run at all. I was forced to leave the aircraft at the field because I couldn't get the engine started. The field elevation was 1300 feet and it was close to 90=B0. The density altitude was about 3000 feet for the day. Today I returned to the field tools in hand to carry out a rescue. Surprisingly the electric fuel pump worked!? Why? I was able to fly the aircraft home. I concerned about flying the aircraft until this issue is diagnosed and resolved. =20 ------=_NextPart_000_004F_01CB4F68.D2476B00 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Thanks Russell,

 

I am just now installing the Dukes pump and noticed the warn= ing about intermittent use. This concerns me because over the last few weeks I&= #8217;ve followed the chat strings discussing flight procedures where the Low Boost = was left on as a normal procedure. Seems like a potential problem. But then aga= in the tolerance on most of these components is so large that I thought perhap= s continuous Low Boost must be OK.

 

Does the Weldon pump have both low and high boost. How does = it compare in price to the $960 Duke.=A0 I waited over a year for this pump th= rough Lancair and finally bough one from a builder.

 

Regards

Stan Fields

Legacy #201

www.lancairl= egacybuilder.com

 

 

From: Lancair Maili= ng List [mailto:lml@lancaironline.net] On Behalf Of Russell
Sent: Wednesday, September 08, 2010 10:49 AM
To: lml@lancaironline.net
Subject: [LML] Dukes fuel pump problem follow-up

 

Everyone thanks for your response.

 

After lengthy evaluation and communications with Dukes and CJ aviation I have lea= rned the following.

 

The Dukes pump is designed for “intermittent duty only” and is not = a self priming pump. It does not have a thermal overload relay. I also found = out that the tolerances in the pump are not well controlled.<= /p>

 

Unfortunately I have been unable to reproduce the failure that I experienced last week. A= ll electrical connections check out properly. The aircraft only has 140 hours = on it.

 

I have decided to replace the Dukes pump with a Weldon pump.

 

The Weldon pump is designed for “continuous duty” and is self primi= ng. These are two big advantages over the Dukes. Also the tolerances are well controlled.

 

I have ordered the Weldon pump with electronic controller from CJ Aviation. I will have the pump by the beginning of next week. Which is a much better delivery time than getting a Dukes.

 

 

Regards

Russell Steiner

N2AA, legacy

 

original posting.

Has anybody run into this problem?

Yes= terday after flying into a field the Dukes of electric fuel pump would not run at = all. I was forced to leave the aircraft at the field because I couldn't get the engine started.

The= field elevation was 1300 feet and it was close to 90=B0. The density altitude was= about 3000 feet for the day.

Tod= ay I returned to the field tools in hand to carry out a rescue. Surprisingly the electric fuel pump worked!? Why?

I w= as able to fly the aircraft home.

I concerned about flying the aircraft until this issue is diagnosed and resol= ved.

 

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